Relevant bibliographies by topics / Metal carbide

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Metal carbide'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 June 2025

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Journal articles on the topic "Metal carbide"

1

Penghui, Yang, Hanguang Fu, Lin Jian, Cheng Haiqiang, and Lei Yongping. "Experimental and ab initio study of the influence of a compound modifier on carbidic ductile iron." Metallurgical Research & Technology 116, no. 3 (2019): 306. http://dx.doi.org/10.1051/metal/2018124.

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To improve the morphology of carbides in carbidic ductile iron, a compound modifier consisting of 0.1% Nb + 0.1% Ti + 0.1 wt.% Y was added to the base ductile iron with chemical composition of 3.72% C, 2.77% Si, 0.51% Mn, 0.99% Cr and balance Fe (wt.%). The effect of this compound modifier on the microstructures of carbidic ductile iron was studied. Also, first-principles calculations were carried out to better understand the modification mechanisms. The results showed that the maximum diameter of spheroidal graphite nodules decreased from 58 to 34 µm after the addition of compound modifier, and continuous carbide networks changed into a broken network. The roundness of graphite nodules decreased slightly, and the percent nodularity of the graphite nodules and the number of carbides decreased by 3 and 1.8%, respectively. Compounds with higher melting point are formed thanks to the compound modifier which acts as heterogeneous core, and the remaining Ti and Nb elements can be selectively attracted by (010) surface of Fe8Cr4C4. Furthermore, Cr elements can be easily replaced by Ti and Nb in the carbides to form more stable Fe8Cr3TiC4 and Fe8Cr3NbC4, which can prevent the continuing growth of carbide on the Fe8Cr4C4 (010) crystal surface and break the continuous network M3C. Y atoms cannot be directly adsorbed onto Fe8Cr4C4 (010) surfaces. They combine first with oxygen in the ductile iron to form Y2O3. The work of adhesion of the interface between a Y2O3 (100) and a Fe8Cr4C3 (010) is predicted to be 0.3 J/m2. The addition of Y element is found to have a positive effect on breaking up the continuity of the carbide network.
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De Bonis, Angela, Mariangela Curcio, Antonio Santagata, Agostino Galasso, and Roberto Teghil. "Transition Metal Carbide Core/Shell Nanoparticles by Ultra-Short Laser Ablation in Liquid." Nanomaterials 10, no. 1 (2020): 145. http://dx.doi.org/10.3390/nano10010145.

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Transition metal carbide nanoparticles are a class of technological interesting materials with a wide range of applications. Among metal carbides, tantalum carbides have good compatibility with the biological environment while molybdenum carbides are used as catalyst in electrochemical reactions. Laser ablation of bulk transition metal targets in some liquids is here reported and laser ablation in organic solvents is used as simple synthetic strategy for the production of carbide nanostructures. Herein, the nanoparticles produced by ultra-short laser ablation of tantalum and molybdenum in water, acetone, ethanol and toluene have been characterized by TEM, XRD and XPS analysis. The combined effect of metal and solvent chemical and physical properties on the composition of the nanomaterials obtained has been pointed out. In particular, the different reactivity of Ta and Mo with respect to oxidizing species determines the composition of particles obtained in water, on the other hand the organic solvents decomposition allows to obtain transition metal carbide (TMC) nanoparticles. The observed carbonaceous shell formed on TMC allows to protect the particle’s carbidic core and to improve and tailor the applications of these nanomaterials.
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Chen, Quhao, Wenhong Ding, Hongbing Wang, Shaolin Xiao, and Wenzhi Yang. "Pre-deformation induced precipitation of alloy carbides and its effect on residual stress." Metallurgical Research & Technology 122, no. 1 (2024): 101. https://doi.org/10.1051/metal/2024079.

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The plasticity generated by carbide precipitation during tempering can relax the residual stress. For low-carbon micro alloyed steel 700L. The plastic behavior resulting from carbide precipitation leads to low stress relaxation. And it is prone to plate shape problems such as warping and edge waves. How to enhance carbide precipitation to relax stress has always been the goal pursued by researchers. In this paper, I discussed the effect of carbide precipitation on stress relaxation by applying pre-deformation to intervene the precipitation law of carbides. It is found that pre-deformation can interfere with the precipitation behavior of carbides during tempering, which in turn affects the relaxation degree of residual stress. Applying pre-deformation can inhibit the precipitation of cementite, improve the dispersion degree and precipitation size of alloy carbides, and improve the relaxation degree of residual stress in the tempering process. With the increase of deformation, the precipitation of cementite during tempering is inhibited, the precipitation of cementite decreases, the precipitation of alloy carbides increases and distributes more dispersed, and the size of alloy carbides decreases from 11.4 nm to 8.6 nm. After pre-deformation tempering, the residual stress is greatly relaxed, up to 85.09%.
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He, Bao, Jing Li, Cheng-bin Shi, and Hao Wang. "Effect of Mg addition on carbides in H13 steel during electroslag remelting process." Metallurgical Research & Technology 115, no. 5 (2018): 501. http://dx.doi.org/10.1051/metal/2018071.

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The effect of Mg on carbides precipitation in H13 steel was studied based on the Thermo-Calc thermodynamic calculation. The results showed that the precipitation temperature of MC phase was significantly improved by adding Mg. The Mg addition had no effect on the type of precipitated carbides. The as-cast microstructure and the characteristic of carbides in Mg-containing H13 steel were analyzed by OM and SEM-EDS. The results showed that the segregation of as-cast microstructure was released and the size of carbides was reduced by increasing Mg. The distribution of carbides was more homogeneous. The formed MgO · Al2O3 arising from Mg treatment provided preferred nucleation site for TiN, which was the core of heterogeneous nucleation of carbides, resulted in decreasing the size of carbides. Furthermore, partial Mg would melt into the carbides, which would change the morphology of carbide and induce the formation of leaf-like carbides. The electron probe micro-analysis (EPMA) results showed that the segregation of V and Mo in H13 steel was inhibited by Mg, and the dissolved Mg in carbide promoted the heterogeneous nucleation of carbides.
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Faye, Omar, and Jerzy A. Szpunar. "Effect of Metal Carbides on Hydrogen Embrittlement: A Density Functional Theory Study." Hydrogen 5, no. 1 (2024): 137–48. http://dx.doi.org/10.3390/hydrogen5010009.

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This study uses plane wave density functional theory (DFT) to investigate the effect of certain metal carbides (Niobium carbide, Vanadium carbide, Titanium carbide, and Manganese sulfide) on hydrogen embrittlement in pipeline steels. Our results predict that the interaction of hydrogen molecules with these metal carbides occurs in the long range with binding energy varying in the energy window [0.043 eV to 0.70 eV].In addition, our study shows the desorption of H2 molecules from these metal carbides in the chemisorptions. Since atomic state hydrogen interacts with NbC, VC, TiC, and MnS to cause embrittlement, we classified the strength of the hydrogen trapping as TiC + H > VC + H > NbC + H> MnS + H. In addition, our study reveals that the carbon site is a more favorable hydrogen-trapping site than the metal one.
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Jiang, Dazhi, Guangjin Wang, Wei Dong, Xiaodong Hong, and Chenguang Guo. "Recent Advance on Metal Carbides Reinforced Laser Cladding Coatings." Molecules 30, no. 8 (2025): 1820. https://doi.org/10.3390/molecules30081820.

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The laser cladding technique can be adapted to fabricate composite coatings on the surface of the metal substrate, which not only effectively improves the surface properties of materials, but also greatly expands their application range. Metal carbides exhibit extremely high hardness, melting point, and outstanding chemical stability. The hardness of carbides is much higher than that of general metal materials. Therefore, various metal carbides serve as reinforcing agents for enhancing the overall performance of metal-based coatings. To date, there is no special review about metal carbide-reinforced laser cladding coatings. In view of the outstanding performance and wide application of metal carbides in laser cladding coatings, herein, recent advances in various metal carbide-reinforced metal coatings are highlighted. According to the type of metal carbides, the whole review is classified into five sections: WC-reinforced coatings, TiC-reinforced coatings, NbC-reinforced coatings, Tin+1AlCn (MAX) reinforced coatings, and Cr3C2, TaC-reinforced coatings. The preparation method, microstructure feature, and application performance of various carbide-reinforced composite coatings are summarized. At last, some prospects are put forward on the current issues and future development directions, aiming to provide comprehensive and in-depth references for the research and application in the field of composite coatings.
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Li, Yutang, Haoran Zhu, Dengping Ji, Bin Luo, and Jianxun Fu. "Investigation on carbide dispersion modified by magnesium and rare earth in high-carbon martensitic stainless steel." Metallurgical Research & Technology 120, no. 5 (2023): 510. http://dx.doi.org/10.1051/metal/2023068.

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Fine and uniform carbides play a beneficial role in the high hardness and wear resistance of martensitic stainless steel. This paper investigates the effect of magnesium and rare earth(RE) on the dispersion of carbides in a high-carbon martensitic stainless steel. The results show that RE-Al-O and RE-Al-O-S inclusions were generated in RE-containing steel, while Mg-Al-O+(Ca, Mn)S and MgO+CaS inclusions were in Mg-containing steel. MC, M7C3, and M23C6 types of carbides were detected in both RE-containing and Mg-containing steels, which is consistent with thermodynamic calculation. The RE-Al-O inclusion can act as heterogeneous nuclei for carbides, while Mg-containing inclusions do not promote carbide precipitation for sulfur enrichment. The three-dimensional etching test suggests that RE-containing steel has more serious network carbides and larger carbide sizes than Mg-containing steel. The carbon segregation ratio presents an “M” shape due to δ→γ phase transformation. Rare earth is easy to combine with S and weaken the inhibiting effect of carbon segregation. Thus, magnesium has a stronger inhibitory effect on carbon segregation than rare earth.
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Guerra, Francisco Vapeani, Arnoldo Bedolla-Jacuinde, Jorge Zuno-Silva, Ignacio Mejia, Edgar Cardoso-Legorreta, and Alberto Arenas-Flores. "Effect of the simultaneous Ti and W addition on the microstructure and wear behavior of a high chromium white cast iron." Metallurgical Research & Technology 116, no. 6 (2019): 602. http://dx.doi.org/10.1051/metal/2019031.

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The present work analyzes the effect of 0.7%Ti and 1.7%W addition to a 17% chromium white iron in as-cast condition and after destabilization heat treatment. These alloys are commonly used in applications where a high abrasive wear resistance is required. For this reason, in addition to the characterization, a complementary wear test was performed. The alloys were characterized by optical and electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. The simultaneous Ti and W addition promoted the (Ti,W)C primary carbides formation which grow in the early stages of solidification. These carbides were found well distributed in the iron matrix with an average hardness value of 2450 HV. Moreover, tungsten was found partially distributed in the different phases increasing the microhardness by solid solution and refining the eutectic carbide. These microstructural modifications resulted in the increase of the bulk hardness and abrasive wear resistance of the alloyed iron. After destabilization heat treatment, the carbide precipitation and the matrix transformation produced a secondary hardening reducing the wear losses. Based in the results of the present study, the simultaneous addition of these elements to promote the (Ti,W)C carbide formation during solidification represents an effective method to increase the hardness and wear resistance of these kind of alloys via small additions.
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Göhl, Daniel, Holger Rueß, Andrea M. Mingers, Karl J. J. Mayrhofer, Jochen M. Schneider, and Marc Ledendecker. "Electrochemical Passivation Properties of Valve Transition Metal Carbides." Journal of The Electrochemical Society 169, no. 1 (2022): 011502. http://dx.doi.org/10.1149/1945-7111/ac47e6.

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Transition metal carbides have the potential to be employed as corrosion protective coating for a variety of applications such as e.g. steel based bipolar plates, porous transport layers or as catalyst support in polymer electrolyte membrane fuel cells and water electrolyzers. Yet, little is known of their fundamental, intrinsic corrosion and passivation properties. Herein, we conducted a detailed electrochemical passivation study of various valve transition metal carbides such as titanium carbide, tantalum carbide or tungsten carbide. Via flow cell measurements coupled to an inductively coupled plasma mass spectrometer, the in situ transition metal dissolution was monitored, and the faradaic dissolution efficiency was calculated. Together with the determination of the grown oxide layer via X-ray photoelectron spectroscopy, a thorough evaluation of the passivation efficiency was conducted. Moreover, it was shown that a beneficial stabilization effect can be achieved through alloying of different carbides which paves the way towards tailor-made coatings or catalyst support materials.
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Zakharov, A., T. Selivyorstova, V. Selivyorstov, V. Balakin, and L. Kamkina. "Features of metal structures digital images containing carbides investigation." System technologies 6, no. 137 (2021): 189–200. http://dx.doi.org/10.34185/1562-9945-6-137-2021-17.

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The analysis of microsections requires the involvement of highly qualified experts in the field of materials science, which, in turn, does not exclude the influence of the "human factor". On the other hand, the issues of increasing the objectivity of identifying the properties of metals and alloys require the use of modern data processing methods, for example, artificial intelligence in solving problems of classification and identification of macro and micro structures.The paper presents an overview of studying macro and micro structures containing carbides process, determining the specific features inherent in these images, and proposing an information model for their processing. The article is devoted to the development of an information model intended for the analysis of metal structures digital images with carbide inclusions. The analysis of literary sources is carried out, it is established that the study of metal structures is an important tool for assessing qualitative characteristics. The presence of carbides in the metal structure has a significant impact on its quality. A review of the methodology for studying the structure of a metal is given, and the importance of metal structures image processing stage is determined. The main methods for obtaining digital images of the alloy structure are described. Samples of metal structures with carbides are presented. A procedure for digital processing of metal structures images with kibide inclusions is proposed, which consists of image conversion to grayscale, contrasting, and threshold binarization. An analysis of the results of metal structures processing images made it possible to identify areas with carbide inclusions, however, additional artifacts that were not carbides were found in some images. Balancing by the binarization threshold in this case does not improve the detection of carbide inclusions network due to the lack of contrast. Histograms demonstrate the presence of information features in a wide range of gray colors, so for this class of images, more sophisticated image processing technologies need to be developed. In the course of digital images features study of metals and alloys metal structures containing carbides, it was: an information model for processing metal structures containing carbide inclusions is proposed; the proposed information model is applied to digital images of metal structures; it was found that some images of metal structures are characterized by low contrast, which leads to the selection of background artifacts, except for areas with carbide inclusions; the development of complex mathematical methods for the detection of carbide inclusions in images of metal structures characterized by low contrast is proposed. Thus, the article shows the results of carbide inclusions of the using the digital image processing procedure. The advantages and disadvantages of the approach are shown, the directions for its improvement are determined.
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Dissertations / Theses on the topic "Metal carbide"

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Tengstrand, Olof. "Transition metal carbide nanocomposite and amorphous thin films." Doctoral thesis, Linköpings universitet, Tunnfilmsfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-104929.

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This thesis explores thin films of binary and ternary transition metal carbides, in the Nb-C, Ti-Si-C, Nb-Si-C, Zr-Si-C, and Nb-Ge-C systems. The electrical and mechanical properties of these systems are affected by their structure and here both nanocomposite and amorphous thin films are thus investigated. By appropriate choice of transition metal and composition the films can be designed to be multifunctional with a combination of properties, such as low electric resistivity, low contact resistance and high mechanical strength. Electrical contacts are one example of application that has been of special interest in this thesis. Since some industrially important substrates used in electrical contacts soften at higher temperature, all films were deposited with dc magnetron sputtering at a low substrate temperature (200-350 °C). I show that the electrical resistivity and mechanical properties of composites consisting of nanocrystalline NbC grains (nc-NbC) in a matrix of amorphous C (a-C) depend strongly on the amount of amorphous C. The best combination of hardness (23 GPa) and electrical resistivity (260 μΩ*cm) are found in films with ~15 at.% a-C phase. This is a higher hardness and lower resistivity than measured for the more well studied Ti-C system if deposited under similar conditions. The better results can be explained by a thinner matrix of amorphous C phase in the case of NbC. The nc-NbC/a-C is therefore interesting as a material in electrical contacts. Si can be added to further control the structure and thereby the properties of binary Me-C systems. There are however, different opinions in the literature of whether Si is incorporated on the Ti or C site in the cubic NaCl (B1) structure of TiC. In order to understand how Si is incorporated in a Me-Si-C material I use a model system of epitaxial TiCx (x ~0.7). In this model system a few atomic percent of Si can be incorporated in the cubic TiC structure. The experimental results together with theoretical stability calculations suggest that the Si is positioned at the C sites forming Ti(Si,C)x. The calculation further shows a strong tendency for Si segregation, which is seen at higher Si contents in the experiments, where Si starts segregate out from the TiCx to the grain boundaries causing a loss of epitaxy. If Si is added to an Nb-C nanocomposite, it hinders the grain growth and thus a reduced size of the NbC grains is observed. The Si segregates to the amorphous matrix forming a-SiC. At the same time the resistivity increases and the hardness is reduced. With even higher amounts of Si (>25 at.%) into the Nb-Si-C material, grain growth is no longer possible and the material becomes amorphous. In order to separate between effects from the addition of Si and the choice of transition metal I compare the Nb-Si-C system to already published results for the Zr-Si-C system. I find that the hardness of the material depends on the amount of strong Si-C bonds rather than the type of transition metal. The reduced elastic modulus is, however, dependent on the choice of transition metal. I therefore suggest that it is possible to make Me-Si-C films with high wear resistance by an appropriate choice of transition metal and composition. Electron microscopy was of importance for determining amorphous structures of Nb-Si-C and Zr-Si-C at high Si contents. However, the investigations were obstructed by electron beam induced crystallization. Further investigations show that the energy transferred from the beam electrons to C and Si atoms in the material is enough to cause atomic displacements. The displacements cause volume fluctuations and thereby enhance the mobility of all the atoms in the material. The result is formation of MeC grains, which are stable to further irradiation. Finally, I have studied substitution of Ge for Si in a ternary system looking at Nb-Ge-C thin films. I show that the films consist of nc-NbC/a-C/a-Ge and that Ge in a similar way to Si decreases the size of the crystalline NbC grains. However, a transition to a completely amorphous material is not seen even at high Ge contents (~30 at.%). Another dissimilarity is that while Si bonds to C and forms a matrix of a-SiC, Ge tends to bond to Ge.
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Garg, Aaron R. "Transition metal carbide and nitride nanoparticles with Noble metal shells as enhanced catalysts." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121890.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2018<br>Cataloged from PDF version of thesis. Page 157 blank. Vita.<br>Includes bibliographical references (pages 137-153).<br>Core-shell nanostructures represent a promising and versatile design platform for enhancing the performance of noble metal catalysts while reducing the cost. Early transition metal carbides (TMCs) and nitrides (TMNs) have been identified as ideal core materials for supporting noble metal shells owing to their earth-abundance, thermal and chemical stability, electrical conductivity, and their ability to bind strongly to noble metals while still being immiscible with them. Unfortunately, the formation of surface oxides or carbon on TMCs and TMNs presents a difficult synthetic challenge for the deposition of atomically thin, uniform noble metal layers. Recent advances have enabled the synthesis of TMC core nanoparticles with noble metal shells (denoted as NM/TMC), although applicability toward TMN cores has not been previously demonstrated. Furthermore, the complete properties of these unique materials are still unknown.<br>This thesis conducts a detailed investigation of the synthesis, characterization, and catalytic performance of NM/TMC and NM/TMN core-shell nanoparticles to provide a comprehensive understanding of their material properties and the underlying phenomena. First, in-situ studies yielded insight into the mechanism behind the high temperature self-assembly of NM/TMC particles, indicating the presence of a metallic alloy phase preceding the formation of the core-shell structure upon insertion of carbon into the lattice. Next, the synthesis of NM/TMN nanoparticles was demonstrated via nitridation of a parent NM/TMC, and the structural and electronic properties of both core-shell materials were examined through in-situ X-ray absorption spectroscopy (XAS). The analysis revealed significant alterations to the electronic structure of the noble metal shell due to bonding interactions with the TMC and TMN cores, which led to weakened adsorbate binding energies.<br>Finally, the materials displayed improved performance for the oxygen reduction reaction (ORR), a critical challenge for fuel cell technologies. Notably, particles with complete, uniform shells exhibited unprecedented stability during electrochemical ageing at highly oxidizing conditions, highlighting the great potential of core-shell architectures with earth-abundant TMC and TMN cores for future ORR applications. Overall, this work will provide new opportunities toward the design of enhanced noble metal catalysts and enable further optimization of their performance.<br>by Aaron R. Garg.<br>Ph. D.<br>Ph.D. Massachusetts Institute of Technology, Department of Chemical Engineering
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Tan, Keng Ean. "Quantum mechanical modelling of refractory transition metal carbide films." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294188.

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Lai, Chung-Chuan. "Phase Formation of Nanolaminated Transition Metal Carbide Thin Films." Doctoral thesis, Linköpings universitet, Tunnfilmsfysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137367.

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Research on inherently nanolaminated transition metal carbides is inspired by their unique properties combining metals and ceramics, such as higher damage tolerance, better machinability and lower brittleness compared to the binary counterparts, yet retaining the metallic conductivity. The interesting properties are related to their laminated structure, composed of transition-metalcarbide layers interleaved by non-transition-metal (carbide) layers. These materials in thin-film form are particularly interesting for potential applications such as protective coatings and electrical contacts. The goal of this work is to explore nanolaminated transition metal carbides from the aspects of phase formation and crystal growth during thin-film synthesis. This was realized by studying phases in select material systems synthesized from two major approaches, namely, fromdirect-deposition and post-deposition treatment. The first approach was used in studies on the Mo-Ga-C and Zr-Al-C systems. In the former system, intriguing properties have been predicted for the 3D phases and their 2D derivatives (socalled MXenes), while in the latter system, the phases are interesting for nuclear applications. In this work, the discovery of a new Mo-based nanolaminated ternary carbide, Mo2Ga2C, is evidenced from thin-film and bulk processes. Its structure was determined using theoretical and experimental techniques, showing that Mo2Ga2C has Ga double-layers in simple hexagonal stacking between adjacent Mo2C layers, and therefore is structurally very similar to Mo2GaC, except for the additional Ga layers. For the Zr-Al-C system, the optimization of phase composition and structure of Zr2Al3C4 in a thin-film deposition process was studied by evaluating the effect of deposition parameters. I concluded that the formation of Zr2Al3C4 is favored with a plasma flux overstoichiometric in Al, and with a minimum lattice-mismatch to the substrates. Consequently, epitaxial Zr2Al3C4 thin film of high quality were deposited on 4H-SiC(001) substrates at 800 °C. With the approach of post-deposition treatment, the studies were focused on a new method of thermally-induced selective substitution reaction of Au for the non-transition-metal layers in nanolaminated carbides. Here, the reaction mechanism has been explored in Al-containing (Ti2AlC and Ti3AlC2) and Ga-containing (Mo2GaC and Mo2Ga2C) phases. The Al and Ga in these phases were selectively replaced by Au while the carbide layers remained intact, resulting in the formation of new layered phases, Ti2Au2C, Ti3Au2C2, Mo2AuC, and Mo2(Au1-xGax)2C, respectively. The substitution reaction was explained by fast outward diffusion of the Al or Ga being attracted to the surface Au, in combination with back-filling of Au, which is chemically inert to the carbide layers,to the vacancies. The substitution reaction was further applied to Ga-containing nanolaminated carbides, (Cr0.5Mn0.5)2GaC and Mo2GaC, motivated by development of novel magnetic nanolaminates. The former experiment resulted in the formation of (Cr0.5Mn0.5)2AuC, where the retained (Cr0.5Mn0.5)2C layers allowed a comparative study on the magnetic properties under the exchange of Ga for Au. After Au substitution, reduction in the Curie temperature and the saturation magnetization were observed, showing a weakened magnetic exchange interaction of the magnetic (Cr0.5Mn0.5)2 Clayers across the Au. In the Mo2GaC case, an Fe-containing MAX phase, Mo2AC with 50 at.% of Fe on the A site, was synthesized through selective substitution of Au-Fe alloy for the Ga layers, showing the first direct evidence for Fe in the MAX-phase structure. The substitution of Fe did not take place on another Mo2GaC sample tested for Fe exchange only, indicating the essential role of Au in catalyzing the Fe-substitution reaction. The knowledge gained from this thesis work contributes to improved approaches for attaining thin films of nanolaminated transition metal carbides with desired phase composition and crystal quality. The reports on the new nanolaminated phases through exchange interactions are likely to expand the family of nanolaminated carbides and advance their properties, and trigger more studies on related (quasi-) 2D materials.
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Hunt, Sean Thomas. "Engineering carbide nanoparticles coated with noble metal monolayers for catalysis." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104207.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 231-249).<br>The noble metals (NMs) comprise ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), platinum (Pt), and gold (Au). Together, these corrosion-resistant elements serve as nature's universal catalysts by binding reactant molecules neither too strongly nor too weakly. This allows for rapid catalytic transformations of reactants into useful products. Modern society, its current technologies, and its emerging renewable energy technologies are underpinned by precious metal catalysts. However, the noble metals are the least abundant elements in the lithosphere, making them prohibitively scarce and expensive for future global-scale technologies. Furthermore, the traditional catalyst engineering toolkit is ill-equipped to optimize the reactivity, stability, and loading of NM catalysts. The technologies developed in this thesis have two overarching implications. First, a method is developed to engineer non-sintered and metal-terminated transition metal carbide (TMC) nanoparticles. Featuring "noble metal-like" surface reactivity, TMCs are earth-abundant and exhibit many useful catalytic properties, such as carbon monoxide and sulfur tolerance. By designing TMC nanoparticles with controlled surface properties, this thesis offers new avenues for replacing noble metal catalysts with inexpensive alternatives. Second, a method is developed to synthesize TMC nanoparticles coated with atomically-thin noble metal monolayers. This offers new directions for improved catalyst designs by substantially enhancing reactivity and stability while reducing overall noble metal loadings. These synthetic achievements in nanoscale core-shell catalyst engineering were guided by computational quantum chemistry, model thin film studies, and advanced spectroscopic techniques. Examination of the catalytic utility of these new materials was performed in the context of water electrolysis, proton exchange membrane fuel cells, direct methanol fuel cells, and high temperature thermal reforming.<br>by Sean Thomas Hunt.<br>Ph. D.
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Sallom, Zuhair Kamil. "Evolution of particle characteristics in sintered hard metal." Thesis, University of Leeds, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236236.

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Kieschke, Robert Richard. "The interface region in titanium reinforced with silicon carbide monofilaments." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335165.

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Cheong, Kuan Yew, and n/a. "Silicon Carbide as the Nonvolatile-Dynamic-Memory Material." Griffith University. School of Microelectronic Engineering, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050115.101233.

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This thesis consists of three main parts, starting with the use of improved nitridation processes to grow acceptable quality gate oxides on silicon carbide (SiC)[1]–[7], to the comprehensive investigation of basic electron-hole generation process in 4H SiC-based metal–oxide–semiconductor (MOS) capacitors [8], [9], and concluding with the experimental demonstration and analysis of nonvolatile characteristics of 4H SiC-based memory devices [10]–[15]. In the first part of the thesis, two improved versions of nitridation techniques have been introduced to alleviate oxide-growth rate and toxicity problems. Using a combination of nitridation and oxidation processes, a sandwich technique (nitridation–oxidation–nitridation) has been proposed and verified to solve the lengthy and expensive oxide-growing process in direct nitric oxide (NO) gas [1]. The nitrogen source from the toxic-NO gas has been replaced by using a nontoxic nitrous oxide (N2O) gas. The best combination of process parameters in this gas is oxide-growing temperature at 1300oC with 10% N2O [2], [3]. The quality of nitrided gate oxides obtained by this technique is lower than the sandwich technique [6], [13]. Using 4H SiC-based MOS with nitrided gate oxides grown by either of the abovementioned nitridation techniques, the fundamentals of electron-hole generation have been investigated using high-temperature capacitance–transient measurements. The contributions of carrier generation, occurring at room temperature, in the bulk and at the SiC–SiO2 interface are evaluated and compared using a newly developed method [8], [9]. The effective bulk-generation rates are approximately equal for both types of nitrided oxides, whereas the effective surface-generation rates have been shown to exhibit very strong dependencies on the methods of producing the nitrided gate oxide. Based on analysis, the prevailing generation component in a SiC-based MOS capacitor with nitrided gate oxide is at SiC–SiO2 interface located below the gate. Utilizing the understanding of electron-hole generation in SiC, the nonvolatile characteristics of memory device fabricated on SiC have been explored. The potential of developing a SiC-based one-transistor one-capacitor (1T/1C) nonvolatile-dynamic memory (NDM) has been analyzed using SiC-based MOS capacitors as storage elements or test structures. Three possible leakage mechanisms have been evaluated [10]–[16]: (1) leakage via MOS capacitor dielectric, (2) leakage due to electron-hole generation in a depleted MOS capacitor, and (3) junction leakage due to generation current occurred at a reverse-biased pn junction surrounding the drain region of a select metal–oxide– semiconductor field–effect–transistor (MOSFET). Among them, leakage through capacitor oxide remains an important factor that could affect the nonvolatile property in the proposed device, whereas others leakage mechanisms are insignificant. Based on the overall results, the potential of developing a SiC-based 1T/1C NDM is encouraging.
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Cheong, Kuan Yew. "Silicon Carbide as the Nonvolatile-Dynamic-Memory Material." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367177.

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This thesis consists of three main parts, starting with the use of improved nitridation processes to grow acceptable quality gate oxides on silicon carbide (SiC)[1]–[7], to the comprehensive investigation of basic electron-hole generation process in 4H SiC-based metal–oxide–semiconductor (MOS) capacitors [8], [9], and concluding with the experimental demonstration and analysis of nonvolatile characteristics of 4H SiC-based memory devices [10]–[15]. In the first part of the thesis, two improved versions of nitridation techniques have been introduced to alleviate oxide-growth rate and toxicity problems. Using a combination of nitridation and oxidation processes, a sandwich technique (nitridation–oxidation–nitridation) has been proposed and verified to solve the lengthy and expensive oxide-growing process in direct nitric oxide (NO) gas [1]. The nitrogen source from the toxic-NO gas has been replaced by using a nontoxic nitrous oxide (N2O) gas. The best combination of process parameters in this gas is oxide-growing temperature at 1300oC with 10% N2O [2], [3]. The quality of nitrided gate oxides obtained by this technique is lower than the sandwich technique [6], [13]. Using 4H SiC-based MOS with nitrided gate oxides grown by either of the abovementioned nitridation techniques, the fundamentals of electron-hole generation have been investigated using high-temperature capacitance–transient measurements. The contributions of carrier generation, occurring at room temperature, in the bulk and at the SiC–SiO2 interface are evaluated and compared using a newly developed method [8], [9]. The effective bulk-generation rates are approximately equal for both types of nitrided oxides, whereas the effective surface-generation rates have been shown to exhibit very strong dependencies on the methods of producing the nitrided gate oxide. Based on analysis, the prevailing generation component in a SiC-based MOS capacitor with nitrided gate oxide is at SiC–SiO2 interface located below the gate. Utilizing the understanding of electron-hole generation in SiC, the nonvolatile characteristics of memory device fabricated on SiC have been explored. The potential of developing a SiC-based one-transistor one-capacitor (1T/1C) nonvolatile-dynamic memory (NDM) has been analyzed using SiC-based MOS capacitors as storage elements or test structures. Three possible leakage mechanisms have been evaluated [10]–[16]: (1) leakage via MOS capacitor dielectric, (2) leakage due to electron-hole generation in a depleted MOS capacitor, and (3) junction leakage due to generation current occurred at a reverse-biased pn junction surrounding the drain region of a select metal–oxide– semiconductor field–effect–transistor (MOSFET). Among them, leakage through capacitor oxide remains an important factor that could affect the nonvolatile property in the proposed device, whereas others leakage mechanisms are insignificant. Based on the overall results, the potential of developing a SiC-based 1T/1C NDM is encouraging.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy (PhD)<br>School of Microelectronic Engineering<br>Faculty of Engineering and Information Technology<br>Full Text
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Brungs, A. J. A. "Transition metal carbides as catalysts for methane reforming." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365881.

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Books on the topic "Metal carbide"

1

Upadhyaya, G. S., and Gopal S. Upadhyaya. Cemented tungsten carbides: Production, properties, and testing. Noyes Publications, 1998.

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J, Birt Michael, and Langley Research Center, eds. Evaluation of several micromechanics models for discontinuously reinforced metal matrix composites. National Aeronautics and Space Administration, Langley Research Center, 1990.

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Wan, Weiming. Reactions of biomass derived oxygenates on metal and carbide surfaces. [publisher not identified], 2018.

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Buarzaiga, Mohamed M. Corrosion behavior of as-cast silicon carbide particulate/aluminum alloy metal-matrix composites. National Library of Canada, 1994.

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Lin, Zhexi. Catalytic Transformation of Biomass-Derived Oxygenates Using Transition Metal Carbide, Nitride, and Oxide Surfaces. [publisher not identified], 2021.

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Tackett, Brian M. Development of Transition Metal Carbide and Nitride Electrocatalysts for Chemical Energy Storage and CO2 Conversion. [publisher not identified], 2019.

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Fisher, G. T. Effects of composition and processing variables on transverse rupture strength and hardness of nickel-alloy-bonded titanium carbide. U.S. Dept. of the Interior, Bureau of Mines, 1987.

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S, El-Genk Mohamed, and United States. National Aeronautics and Space Administration., eds. A review of nuclear thermal propulsion carbide fuel corrosion and key issues, final report. National Aeronautics and Space Administration, 1994.

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S, El-Genk Mohamed, and United States. National Aeronautics and Space Administration., eds. A review of nuclear thermal propulsion carbide fuel corrosion and key issues, final report. National Aeronautics and Space Administration, 1994.

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Gubanov, V. A. Electronic structure of refractory carbides and nitrides. Cambridge University Press, 1994.

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Book chapters on the topic "Metal carbide"

1

Tachikawa, Mamoru, and E. L. Muetterties. "Metal Carbide Clusters." In Progress in Inorganic Chemistry. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470166291.ch3.

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Cottrell, Alan. "Titanium Carbide." In Chemical Bonding in Transition Metal Carbides. CRC Press, 2025. https://doi.org/10.1201/9781003575894-5.

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Tilak, Vinayak. "Inversion Layer Electron Transport in 4H-SiC Metal-Oxide-Semiconductor Field-Effect Transistors." In Silicon Carbide. Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527629077.ch11.

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Reshanov, Sergey A., Konstantin V. Emtsev, Florian Speck, et al. "Effect of an Intermediate Graphite Layer on the Electronic Properties of Metal/SiC Contacts." In Silicon Carbide. Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527629077.ch3.

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Mellinger, Zachary J., and Jingguang G. Chen. "Metal-Modified Carbide Anode Electrocatalysts." In Lecture Notes in Energy. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4911-8_2.

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Hargreaves, J. S. J. "Chapter 4. Metal Carbide Catalysts." In Alternative Catalytic Materials. Royal Society of Chemistry, 2018. http://dx.doi.org/10.1039/9781788013222-00071.

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Gribkov, A. N. "Composites of the aluminium—silicon carbide system." In Metal Matrix Composites. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1266-6_8.

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Ochoa, R., X. X. Bi, A. M. Rao, and P. C. Eklund. "Transition metal nitride and carbide nanoparticles." In The Chemistry of Transition Metal Carbides and Nitrides. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1565-7_27.

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Leclercq, L., A. Almazouari, M. Dufour, and G. Leclercq. "Carbide-oxide interactions in bulk and supported tungsten carbide catalysts for alcohol synthesis." In The Chemistry of Transition Metal Carbides and Nitrides. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1565-7_18.

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Liu, L. M., Song Quang Wang, and Heng Qiang Ye. "Segregation Effects on the Metal-Carbide Interface." In Materials Science Forum. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.4251.

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Conference papers on the topic "Metal carbide"

1

Levy, Alan V., and Nancy Jee. "Elevated Temperature Sliding Wear of Ceramic and Hard Metal Coatings." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86112.

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Abstract The unlubricated sliding wear behavior of several coating materials pairs that are candidates for the piston ring-cylinder wall application in adiabatic diesel engines was determined in air at 25°, 425° and 730°C. Plasma sprayed metal bonded carbide composites on a washer component were worn in a 90° reversing oscillatory mode against a slurry deposited and impregnated mixed oxide on a wider surface disc at contact pressures from 0.17 to l4MPa. It was determined that the morphology of the coatings was more important than the composition in establishing wear rates. The ductile binder metal of the carbides was the dominant constituent on the wear interface of both the washer and the disc. Wear rates generally increased with temperature. A pre-test wear-in at 25°C and a low contact pressure enhanced the wear resistance of the plasma sprayed carbide materials both at higher pressures and higher temperatures.
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Lunn, Kentaro, and Vilupanur Ravi. "Corrosion Behavior of Metal-Ceramic Composites." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16931.

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Abstract Zirconium carbide/zirconium boride ceramic composites were melt processed in an inert atmosphere using a combination of zirconium alloys and boron carbide particulates. UNS R60702 (commercially pure zirconium, CP Zr) and UNS R60705 (Zr-2.5Nb) were utilized in this study. Corrosion test coupons were cross sectioned from the as-fabricated materials. Microstructural and phase characterization of the composites were accomplished by optical and scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The corrosion behavior of these composite materials was evaluated in accordance with ASTM G59-97 and ASTM B117-18. The erosion characteristics were determined in accordance with ASTM G75-15.
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Pelayo, Lisbeth, Chase C. Hargrove, David S. Calderon, Harrison B. Porter, and Vilupanur Ravi. "Abrasion of Novel Aluminum Metal Matrix Composites." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16936.

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Abstract Ceramic-reinforced aluminum alloys offer distinct advantages over the base alloy. In this project, aluminum-based composites containing silicon carbide particle reinforcements were fabricated using an infiltration technique. Silicon carbide particles were incorporated into molten Al-10% Mg-5% Si (wt%). The resulting materials were characterized using optical and scanning electron microscopy to understand their microstructure. Phase analysis was conducted using X-ray diffraction. Vickers microhardness measurements were also obtained. The abrasion behavior of these composites was studied and compared to the matrix aluminum alloy as well as gray cast iron.
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Quets, J., and J. R. Alford. "Corrosion and Wear Resistance of Tungsten Carbide - Cobalt and Tungsten Carbide - Cobalt - Chromium Thermal Spray Coatings." In CORROSION 1999. NACE International, 1999. https://doi.org/10.5006/c1999-99047.

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Abstract Tungsten Carbide Thermal Spray coatings provide wear surfaces to new and overhauled components for various industries. Their wear resistance is obtained by incorporating small tungsten carbide particles into a metal matrix. This presentation will show what parameters influence their corrosion resistance in the ASTM B-117 Salt Spray Corrosion Test.
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Totsuka, Nobuo, Takumi Terachi, Takuyo Yamada, Masayoshi Ozawa, and Kiyotomo Nakata. "Effect of Metallurgical Factors on PWSCC Growth Rate of Ni-based Alloys." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08591.

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Abstract It is known that Ni based alloy suffered SCC in primary water of PWR. It has been clarified that the SCC crack growth rate of weld metal is faster than that of base metal of alloy 600(UNS N06600) and the SCC cracks hardly propagate in both weld and base metal of alloy 690(UNS N06690). In this study, four base metals and two weld metals of alloy 600 and one base metal and two weld metals of alloy 690 have been examined to clarify the metallurgical factors which affect on the SCC propagation behavior. The followings are clarified the metallurgical factors which possibly affect on the SCC propagation behavior of Ni based alloys. 1) There is not clear difference between 690 and 600 on grain boundary character distributions and hardness, however these factors of base metal are different from weld metal. 2) The most important difference between 690 and 600 is on the intergranular carbides. Coherent Cr23C6 which is coherent to one side of base lattice is dominant in both weld and base metal of alloy 690, however incoherent M7C3. is dominant in base metal and incoherent NbC is dominant in weld metal of alloy 600. According to these results, it is considered that the effect of intergranular carbide on PWSCC is stronger than the other metallurgical factors such as grain boundary character distributions and hardness, then coherent Cr23C6 has the strongest effect on inhibiting PWSCC propagation.
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LeClair, M. J., J. T. Orr, M. C. Burrell, P. C. Sander, and R. A. Morris. "Corrosion and Corrosion Product Release Behavior of Co-Cr-W-C Weld Deposit." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05439.

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Abstract The corrosion behavior of Co-Cr-W-C weld deposit (UNS R30006) was tested in deaerated, pH adjusted water at 500 °F for up to 10,000 hours, and subsequently analyzed by X-Ray Diffraction, Auger Electron Spectroscopy, and Electron Spectroscopy for Chemical Analysis to determine oxide composition, and Scanning Electron Microscopy and Focused Ion Beam excavation to measure oxide thickness. The resultant weld deposit corrosion rate was three times higher than that of the analogous wrought material. The primary oxide phase composition of all surfaces was CoCr2O4; some corrosion films had a high-Co phase, likely CoFe2O4 or CoO, on their outermost surface. Thin corrosion films were found at the specimen surfaces, thinner over the Cr-rich carbide phase than the Co-Cr-W metal matrix, except where the carbide boundaries intersect the surface. Where this occurs, corrosion penetrates down and around the carbides, where the adjacent metal matrix regions are likely depleted in Cr and more susceptible to attack. These sub-surface corroded areas may have been excluded in other evaluations at shorter exposures, thus understating this material’s long-term corrosion rate. As a post-weld stress relief heat treatment applied to some specimens resulted in more carbides, it also resulted in higher corrosion rates.
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Hermse, Chrétien, Antoine Kempen, and Hans van Wortel. "Metal Dusting: What Determines Aggressivity?" In CORROSION 2007. NACE International, 2007. https://doi.org/10.5006/c2007-07416.

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Abstract The degradation mechanism metal dusting occurs in low and high pressure syngas environments between 500 and 700 C. Metal dusting is a combination of both oxidation and carburization effects, in which a (ferritic or austenitic) alloy matrix is supersaturated with interstitial carbon, usually originating from gaseous carbon monoxide. At sufficiently high temperatures, the alloy matrix will decompose into graphite, metal, metal oxide and metal carbide particles, leading to loss of containment. A previous joint industry project (JIP) established a general ranking of the resistance of materials. As yet, it is not known –but vitally important- which material can be used in a certain given gas atmosphere. The ongoing research programme aims to predict the aggressivity of any given syngas atmosphere, thus coupling it to a range of appropriate construction alloys or coatings.
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LAPIN, Juraj. "Cast in-situ TiAl-based matrix composites reinforced with carbide particles." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.747.

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Dyer, P. N., D. Garg, M. A. Pellman, and J. J. Sheridan. "CVD Tungsten Carbide and Titaniutm Carbide Coatings for Aerospace Components." In Annual Aerospace/Airline Plating and Metal Finishing Forum and Exposition. SAE International, 1989. http://dx.doi.org/10.4271/890933.

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WORASAEN, Kaweewat, Suttipong WANNAPAIBOON, Karuna TUCHINDA, and and Piyada SUWANPINIJ. "Characterization of Secondary Carbide in Martensitic Stainless Steel after Deep-Cryogenic Treatment Processes." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.715.

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Reports on the topic "Metal carbide"

1

Rabin, B. A review of silicon carbide/metal interactions with relevance to silicon carbide joining. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5886805.

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Root, Harrison, Jacob Boissiere, and Matthew Christian. Development of Metal Boride/Carbide Precursors for MOCVD Applications. Office of Scientific and Technical Information (OSTI), 2024. https://doi.org/10.2172/2516871.

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Speyer, Robert F. Synthesis and Processing of Ultra-High Temperature Metal Carbide and Metal Diboride Nanocomposite Materials. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada483547.

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Root, Harrison, Jacob Boissiere, and Matthew Christian. Development of Metal Boride/Carbide Precursors for Metal Organic Chemical Vapor Deposition (MOCVD) Applications. Office of Scientific and Technical Information (OSTI), 2024. https://doi.org/10.2172/2480095.

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Lambrecht, Walter R. First-Principles Theory of Transition Metal Impurities in Silicon Carbide. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada389332.

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Way, J. Douglas, and Colin A. Wolden. Nanoporous, Metal Carbide, Surface Diffusion Membranes for High Temperature Hydrogen Separations. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1121750.

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Chen, Tianju, Bipul Barua, Tianchen Hu, Mark Messner, and Tahany El-Wardany. An ICME Modeling Framework for Titanium/Tungsten-Carbide Metal Matrix Composites. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/1985051.

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Howell, Paul R. Microstructural Development in a Spray Formed Aluminum-Silicon Carbide Based Metal Matrix Composite. Defense Technical Information Center, 1992. http://dx.doi.org/10.21236/ada251425.

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Davis, Paul R., and William A. Mackie. Development of Transition Metal Carbide Field Emitters for Use in FEA Display Systems. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada389243.

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Kang, S., J. H. Selverian, H. Kim, D. O'Niel, and K. Kim. Analytical and experimental evaluation of joining silicon nitride to metal and silicon carbide to metal for advanced heat engine applications. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6767279.

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