Bibliographies thématiques / Ultra High Temperature Materials

Littérature scientifique sur le sujet « Ultra High Temperature Materials »

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Publié le 25 mai 2024

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Articles de revues sur le sujet "Ultra High Temperature Materials"

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MASUMOTO, Hiroki. « The Activities of Japan Ultra-high Temperature Materials Research Center and Japan Ultra-high Temperature Materials Research Institute. » RESOURCES PROCESSING 46, no 4 (1999) : 219–24. http://dx.doi.org/10.4144/rpsj1986.46.219.

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Zhang, Guo Jun, Wen Wen Wu, Yan Mei Kan et Pei Ling Wang. « Ultra-High Temperature Ceramics (UHTCs) via Reactive Sintering ». Key Engineering Materials 336-338 (avril 2007) : 1159–63. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1159.

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Current high temperature ceramics, such as ZrO2, Si3N4 and SiC, cannot be used at temperatures over 1600°C due to their low melting temperature or dissociation temperature. For ultrahigh temperature applications over 1800°C, materials with high melting points, high phase composition stability, high thermal conductivity, good thermal shock and oxidation resistance are needed. The transition metal diborides, mainly include ZrB2 and HfB2, have melting temperatures of above 3000°C, and can basically meet the above demands. However, the oxidation resistance of diboride monolithic ceramics at ultra-high temperatures need to be improved for the applications in thermal protection systems for future aerospace vehicles and jet engines. On the other hand, processing science for making high performance UHTCs is another hot topic in the UHTC field. Densification of UHTCs at mild temperatures through reactive sintering is an attracting way due to the chemically stable phase composition and microstructure as well as clean grain boundaries in the obtained materials. Moreover, the stability studies of the materials in phase composition and microstructures at ultra high application temperatures is also critical for materials manufactured at relatively low temperature. Furthermore, the oxidation resistance in simulated reentry environments instead of in static or flowing air of ambient pressure should be evaluated. Here we will report the concept, advantages and some recent progress on the reactive sintering of diboride–based composites at mild temperatures.
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Kurokawa, Kazuya. « Metal Disilicides as Ultra-High Temperature Oxidation-Resistant and High-Temperature Corrosion-Resistant Materials ». Materia Japan 52, no 9 (2013) : 428–33. http://dx.doi.org/10.2320/materia.52.428.

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Fang, Daining, Weiguo Li, Tianbao Cheng, Zhaoliang Qu, Yanfei Chen, Ruzhuan Wang et Shigang Ai. « Review on mechanics of ultra-high-temperature materials ». Acta Mechanica Sinica 37, no 9 (septembre 2021) : 1347–70. http://dx.doi.org/10.1007/s10409-021-01146-3.

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Tanaka, Ryohei. « The International Symposium on Ultra-high Temperature Materials ». Materials at High Temperatures 9, no 4 (novembre 1991) : 237–38. http://dx.doi.org/10.1080/09603409.1991.11689665.

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Fahrenholtz, William G., et Greg E. Hilmas. « Ultra-high temperature ceramics : Materials for extreme environments ». Scripta Materialia 129 (mars 2017) : 94–99. http://dx.doi.org/10.1016/j.scriptamat.2016.10.018.

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WANG, RUZHUAN, WEIGUO LI et DAINING FANG. « A THERMO-DAMAGE STRENGTH MODEL FOR THE SiC-DEPLETED LAYER OF ULTRA-HIGH-TEMPERATURE CERAMICS ON HIGH TEMPERATURE OXIDATION ». International Journal of Applied Mechanics 05, no 03 (septembre 2013) : 1350026. http://dx.doi.org/10.1142/s1758825113500269.

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At high temperatures above 1650°C, the SiC -depleted layer of ultra-high-temperature ceramics which has high porosity appears during the oxidation process. In this present paper, based on the studies of the oxidative mechanisms and the fracture mechanisms of ultra-high-temperature ceramics under normal and high temperatures, a thermo-damage strength model for the SiC -depleted layer on high temperature oxidation was proposed. Using the model, the phase transformation, microstructure development and fracture performance in the SiC -depleted layer on high temperature oxidation were studied in detail. The study showed that the porosity is mainly related to the oxidation of SiC . And while the SiC is substantially completely oxidized, only a very small part of matrix is oxidized. The fracture strength of the SiC -depleted layer degrades seriously during the high temperature oxidation process. And the bigger the initial volume fraction of SiC , the lower the fracture strength of the SiC -depleted layer is. This layer may become the origin of failure of material, thus the further researches should be undertaken to improve the oxidation behavior for the ultra-high-temperature ceramics in a wider temperature range.
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Xu, Lin, Jia Cheng, Xingchao Li, Yin Zhang, Zhen Fan, Yongzhong Song et Zhihai Feng. « Preparation of carbon/carbon‐ultra high temperature ceramics composites with ultra high temperature ceramics coating ». Journal of the American Ceramic Society 101, no 9 (3 avril 2018) : 3830–36. http://dx.doi.org/10.1111/jace.15565.

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Fuller, Joan, et Michael D. Sacks. « Guest Editorial : Ultra-high temperature ceramics ». Journal of Materials Science 39, no 19 (octobre 2004) : 5885. http://dx.doi.org/10.1023/b:jmsc.0000041685.85043.34.

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TANAKA, Ryohei. « Heat Resisiting Steels, Superalloys, and Ultra-high Temperature Materials ». Tetsu-to-Hagane 79, no 4 (1993) : N282—N289. http://dx.doi.org/10.2355/tetsutohagane1955.79.4_n282.

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Thèses sur le sujet "Ultra High Temperature Materials"

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Petla, Harita. « Computational design of ultra-high temperature ceramic composite materials ». To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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Walker, Luke Sky. « Processing of Ultra High Temperature Ceramics ». Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/228496.

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For hypersonic flight to enable rapid global transport and allow routine space access thermal protection systems must be developed that can survive the extreme aerothermal heating and oxidation for extended periods of time. Ultra high temperature ceramics (UHTCs) are the only potential materials capable of surviving the extreme hypersonic environment however extensive research in processing science and their oxidation properties are required before engineering systems can be developed for flight vehicles. Investigating the role of oxides during processing of ultra high temperature ceramics shows they play a critical role in both synthesis of ceramic powders and during densification. During spark plasma sintering of UHTCs the oxides can result in the formation of vapor filled pores that limit densification. A low temperature heat treatment can remove the oxides responsible for forming the vapor pores and also results in a significant improvement of the densification through a particle surface physical modification. The surface modification breaks up the native continuous surface oxide increasing the surface energy of the powder and removing the oxide as a barrier to diffusion that must be overcome before densification can begin. During synthesis of UHTCs from sol-gel the B₂O₃ phase acts as the main structure of the gel limiting the transition metal oxide network. While heat treating to form diborides the transition metal oxide undergoes preferential reduction forming carbides that reduce B₂O₃ while at high temperature encourage particle growth and localized extreme coarsening. To form phase pure borides B₂O₃ is required in excessive quantities to limit residual carbides, however carbide reduction and grain growth are connected. When the UHTC systems of ZrB₂-SiC are exposed to oxidation, either as dense ceramics or coatings on Carbon-Carbon composites, at high temperatures they undergo a complex oxidation mechanism with simultaneous material transport, precipitation and evaporation of oxide species that forms a glass ceramic protective oxygen barrier on the surface. The composite effect observed between the oxides of ZrB₂-SiC enables them to survive extreme oxidizing environments where traditional SiC oxidation barrier coatings fail.
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Miller-Oana, Melia. « Oxidation Behavior of Carbon and Ultra-High Temperature Ceramics ». Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/605121.

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Hypersonic vehicles require material systems that can withstand the extreme environment they experience during flight. Carbon-based materials and ultra-high temperature ceramics are candidates for materials systems that will protect hypersonic vehicles. In order to study the material response, an oxyacetylene torch facility and thermal gravimetric analysis are used to investigate the gas-solid interactions under conditions that simulate aspects of flight. The oxyacetylene torch facility is characterized as a function of position from the tip for heat flux and oxygen content. By understanding the local heat flux and oxygen conditions, experiments are designed so that graphite ablation rates can be measured as a function of heat flux and partial pressure of oxygen. Further investigation shows that composition of the material influences the temperature response where ultra-high temperature ceramics exhibit the lowest surface temperatures. Using thermal gravimetric analysis, the isothermal oxidation behavior of ultra-high temperature ceramics from 1000-1600°C is investigated using a Dynamic Non- Equilibrium method in order to understand the reaction kinetics of ZrB₂-SiC where parabolic rate constants are determined. Isothermal oxidation behavior is compared to non-isothermal mass gain and oxide scale formation where specimens oxidized isothermally gain 3 times more mass and have oxide scales 4 times as thick. Finally, the effect of SiC content in ZrB₂ on temperature during oxyacetylene torch testing is determined. Increasing the amount of SiC results in lower front face temperatures because more heat is absorbed due to the endothermic reactions of evaporation of SiO₂.
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Pham, David, et David Pham. « Processing High Purity Zirconium Diboride Ultra-High Temperature Ceramics : Small-to-Large Scale Processing ». Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621315.

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Next generation aerospace vehicles require thermal protection system (TPS) materials that are capable of withstanding the extreme aerothermal environment during hypersonic flight (>Mach 5 [>1700 m/s]). Ultra-high temperature ceramics (UHTC) such as zirconium diboride (ZrB₂) are candidate TPS materials due to their high-temperature thermal and mechanical properties and are often the basis for advanced composites for enhanced oxidation resistance. However, ZrB₂ matrix impurities in the form of boron trioxide (B₂O₃) and zirconium dioxide (ZrO₂) limit the high-temperature capabilities. Electric based sintering techniques, such as spark plasma sintering (SPS), that use joule heating have become the preferred densification method to process advanced ceramics due to its ability to produce high density parts with reduced densification times and limit grain growth. This study focuses on a combined experimental and thermodynamic assisted processing approach to enhance powder purity through a carbo- and borocarbo-thermal reduction of oxides using carbon (C) and boron carbide (B₄C). The amount of oxides on the powder surface are measured, the amount of additive required to remove oxides is calculated, and processing conditions (temperature, pressure, environment) are controlled to promote favorable thermodynamic reactions both during thermal processing in a tube furnace and SPS. Untreated ZrB₂ contains 0.18 wt%O after SPS. Additions of 0.75 wt%C is found to reduce powder surface oxides to 0.12 wt%O. A preliminary Zr-C-O computational thermodynamic model shows limited efficiency of carbon additions to completely remove oxygen due to the solubility of oxygen in zirconium carbide (ZrC) forming a zirconium oxycarbide (ZrCₓOᵧ). Scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) with atomic scale elemental spectroscopy shows reduced oxygen content with amorphous Zr-B oxides and discreet ZrO₂ particle impurities in the microstructure. Processing ZrB₂ with minimal additions of B₄C (0.25 wt%) produces high purity parts after SPS with only 0.06 wt%O. STEM identifies unique “trash collector” oxides composed of manufacturer powder impurities of calcium, silver, and yttrium. A preliminary Zr-B-C-O thermodynamic model is used to show the potential reaction paths using B₄C that promotes oxide removal to produce high-purity ZrB₂ with fine grains (3.3 𝜇m) and superior mechanical properties (flexural strength of 660MPa) than the current state-of-the-art ZrB₂ ceramics. Due to the desirable properties produced using SPS, there is growing interest to advance processing techniques from lab-scale (20 mm discs) to large-scale (>100 mm). The advancement of SPS technologies has been stunted due to the limited power and load delivery of lab-scale furnaces. We use a large scale direct current sintering furnace (DCS) to address the challenges of producing industrially relevant sized parts. However, current-assisted sintering techniques, like SPS and DCS, are highly dependent on tooling resistances and the electrical conductivity of the sample, which influences the part uniformity through localized heating spots that are strongly dependent on the current flow path. We develop a coupled thermal-electrical finite element analysis model to investigate the development and effects of tooling and current density manipulation on an electrical conductor (ZrB₂) and an electrical insulator, silicon nitride (Si₃N₄), at the steady-state where material properties, temperature gradients and current/voltage input are constant. The model is built based on experimentally measured temperature gradients in the tooling for 20 mm discs and validated by producing 30 mm discs with similar temperature gradients and grain size uniformity across the part. The model aids in developing tooling to manipulate localize current density in specific regions to produce uniform 100 mm discs of ZrB₂ and Si₃N₄.
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He, Junjing. « High temperature performance of materials for future power plants ». Doctoral thesis, KTH, Materialvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191547.

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Increasing energy demand leads to two crucial problems for the whole society. One is the economic cost and the other is the pollution of the environment, especially CO2 emissions. Despite efforts to adopt renewable energy sources, fossil fuels will continue to dominate. The temperature and stress are planned to be raised to 700 °C and 35 MPa respectively in the advanced ultra-supercritical (AUSC) power plants to improve the operating efficiency. However, the life of the components is limited by the properties of the materials. The aim of this thesis is to investigate the high temperature properties of materials used for future power plants. This thesis contains two parts. The first part is about developing creep rupture models for austenitic stainless steels. Grain boundary sliding (GBS) models have been proposed that can predict experimental results. Creep cavities are assumed to be generated at intersection of subboundaries with subboundary corners or particles on a sliding grain boundary, the so called double ledge model. For the first time a quantitative prediction of cavity nucleation for different types of commercial austenitic stainless steels has been made. For growth of creep cavities a new model for the interaction between the shape change of cavities and creep deformation has been proposed. In this constrained growth model, the affected zone around the cavities has been calculated with the help of FEM simulation. The new growth model can reproduce experimental cavity growth behavior quantitatively for different kinds of austenitic stainless steels. Based on the cavity nucleation models and the new growth models, the brittle creep rupture of austenitic stainless steels has been determined. By combing the brittle creep rupture with the ductile creep rupture models, the creep rupture strength of austenitic stainless steels has been predicted quantitatively. The accuracy of the creep rupture prediction can be improved significantly with combination of the two models. The second part of the thesis is on the fatigue properties of austenitic stainless steels and nickel based superalloys. Firstly, creep, low cycle fatigue (LCF) and creep-fatigue tests have been conducted for a modified HR3C (25Cr20NiNbN) austenitic stainless steel. The modified HR3C shows good LCF properties, but lower creep and creep-fatigue properties which may due to the low ductility of the material. Secondly, LCF properties of a nickel based superalloy Haynes 282 have been studied. Tests have been performed for a large ingot. The LCF properties of the core and rim positions did not show evident differences. Better LCF properties were observed when compared with two other low γ’ volume fraction nickel based superalloys. Metallography study results demonstrated that the failure mode of the material was transgranular. Both the initiation and growth of the fatigue cracks were transgranular.

QC 20160905

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Lipke, David William. « Novel reaction processing techniques for the fabrication of ultra-high temperature metal/ceramic composites with tailorable microstructures ». Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/43750.

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Ultra-high temperature (i.e., greater than 2500°C) engineering applications present continued materials challenges. Refractory metal/ceramic composites have great potential to satisfy the demands of extreme environments (e.g., the environments found in solid rocket motors upon ignition), though general scalable processing techniques to fabricate complex shaped parts are lacking. The work embodied in this dissertation advances scientific knowledge in the development of processing techniques to form complex, near net-shape, near net-dimension, near fully-dense refractory metal/ceramic composites with controlled phase contents and microstructure. Three research thrusts are detailed in this document. First, the utilization of rapid prototyping techniques, such as computer numerical controlled machining and three dimensional printing, for the fabrication of porous tungsten carbide preforms and their application with the Displacive Compensation of Porosity process is demonstrated. Second, carbon substrates and preforms have been reactively converted to porous tungsten/tungsten carbide replicas via a novel gas-solid displacement reaction. Lastly, non-oxide ceramic solid solutions have been internally reduced to create intragranular metal/ceramic micro/nanocomposites. All three techniques combined have the potential to produce nanostructured refractory metal/ceramic composite materials with tailorable microstructure for ultra-high temperature applications.
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WU, QUANYAN. « MICROSTRUCTURAL EVOLUTION IN ADVANCED BOILER MATERIALS FOR ULTRA-SUPERCRITICAL COAL POWER PLANTS ». University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1154363707.

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Audouard, Lisa. « Conception et caractérisation de matériaux ultra haute température à gradient de propriétés ». Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCA019.

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Le développement d’un nouveau prototype d’ergol vert destiné aux moteurs de repositionnement de satellites implique des conditions thermiques et environnementales plus sévères pour les matériaux de la chambre de combustion, par rapport aux conditions actuelles. De ce fait, des matériaux alternatifs dits Matériaux à Gradient de Propriétés (MGP) sont développés depuis plusieurs années dans le cadre d’une étude ONERA-CNES-ICB. Cette thèse a pour objectif de poursuivre le développement de ce type de matériau à gradient céramique/métal afin d’optimiser sa conception et d’assurer ainsi sa mise en œuvre jusqu’à 2400 °C en présence de vapeur d’eau. Premièrement, différentes configurations de MGP élaborés par projection thermique plasma sous air (APS) ont été testées sous flux thermique laser sous vide jusqu’à 2350 °C. La mise en place d’une modélisation de la fissuration de ces matériaux soumis à un choc thermique a permis de mieux faire le lien entre les dégradations observées et les configurations de MGP. En particulier, il a été montré que l’augmentation de l’épaisseur de la céramique à la surface du MGP est responsable de l’apparition et de la propagation de fissures plus profondes et déviées.Dans un second temps, la possibilité d’utiliser les MGP élaborés dans une ambiance oxydante à ultra haute température a été étudiée au moyen de deux bancs d’essais expérimentaux. Le premier d’entre eux est un banc laser qui a permis de tester les matériaux face à des chocs thermiques répétés jusqu’à 1800 °C et en présence de vapeur d’eau. Les matériaux testés ont présenté une bonne résistance et les mécanismes de dégradation relatifs à l’oxydation du MGP ont pu être identifiés et reliés à aux différentes configurations de MGP et aux conditions d’essai testées. Dans ces conditions, l’augmentation de l’épaisseur de la couche céramique assure une meilleure protection contre l’oxydation. Le second moyen d’essai a permis de qualifier les MGP dans la flamme H2/O2 d’une chambre de combustion. De ce fait, les conditions d’essais étaient relativement proches des conditions réelles visées. Aucune dégradation majeure n’a été relevée à la suite de ces essais en chambre de combustion, ce qui démontre le potentiel de ce type de MGP pour l’application visée.En parallèle, un travail a été mené sur l’amélioration de la partie en céramique du MGP. En effet, le métal utilisé a un coefficient de dilatation thermique deux fois inférieur à celui de la céramique choisie. De ce fait, et malgré la présence du gradient, de fortes contraintes thermomécaniques s’exercent au niveau des interfaces entre les différentes couches du MGP. Ainsi, un point clé de cette étude a consisté à comprendre l’influence de la composition de la céramique et en particulier du taux et de la nature de l’oxyde de terre rare utilisé sur le coefficient de dilatation thermique. De plus, des mesures de conductivité ionique et de conductivité thermique ont permis de rendre compte du rôle de barrière thermique et environnemental de la couche en céramique pure à la surface du MGP. Il a été montré que des compositions à base de forts taux de Lu2O3 étaient les plus prometteuses. Enfin, une dernière partie de cette thèse était consacrée à étudier la possibilité de cicatriser les fissures observées au sein de la couche céramique, apparues à la suite du traitement thermique ou à la suite d’un essai sous flux thermique. Pour cela, un disilicate d’yttrium a été introduit dans la couche en céramique pure du MGP directement au cours de l’élaboration par APS. Son influence sur la résistance des échantillons dans des conditions sévères de température et d’atmosphère a été reportée. En particulier, la présence de ce disilicate est responsable de transformations chimiques au sein du MGP au cours des essais à haute température
The development of a new green ergol prototype for satellite repositioning engines requires more severe thermal and environmental conditions for combustion chamber materials than is currently the case. As a result, alternative materials known as functionally graded materials (FGM) have been developed for several years as part of an ONERA-CNES-ICB study. The aim of this thesis is to pursue the development of this type of ceramic/metal gradient material, in order to optimize its design and ensure that it can be used up to 2400 °C in the presence of water vapor. Firstly, different configurations of FGM developed by air plasma thermal spraying (APS) were tested under vacuum laser heat flux up to 2350 °C. By modelling the cracking of these materials when subjected to thermal shock, the link between the observed degradations and the FGM configurations was better established. In particular, it has been shown that increasing the thickness of the ceramic on the FGM surface is responsible for the appearance and propagation of deeper, deviated cracks.Secondly, the possibility to use such FGM under an oxidising atmosphere at ultra-high temperature was studied through two experimental set ups. The first one is a laser test bench which allowed to assure the resistance of the materials submitted to repeated thermal schocks up to 1800 °C in presence of water vapour. The tested materials presented an appropriate behaviour under the tested conditions. The degradation mechanisms related to FGM oxidation have been identified and compared from one FGM configuration to another and linked to the tested conditions. The second one permits to qualify the behaviour of FGM in the H2/O2 flame of a combustion chamber. Thus, the tested conditions were relatively close to the ones of the intended application. No major degradation was observed after the combustion chamber tests, which demonstrates the potential of this type of FGM for the application.In parallel, a study was carried out about the improvement of the ceramic part of the FGM. Indeed, the thermal expansion coefficient of the chosen metal is twice lower than the one of the chosen ceramic. Thus, and despite the presence of graded layers in-between the metal and the ceramic, high thermomechanical stresses occur at the interfaces between the different layers of the FGM. Thus, a key point of this study consisted in the understanding of the influence of the ceramic composition, and in particular of the amount and nature of the rare earth oxide, on the thermal expansion coefficient. In addition, ionic conductivity and thermal conductivity measurements most accurately reflect the role of thermal and environmental barrier coating of the pure ceramic layer upon the FGM. It has been shown that high content Lu2O3 based compositions are the most promising to be used for the ceramic composition of the FGM. The last part of this thesis was dedicated to study the possibility to heal the cracks observed in the ceramic, which came either from the thermal treatment, either from the thermal tests. Thus, an yttrium disilicate was introduced in the pure ceramic layer of the FGM directly during the elaboration process with APS. Its influence on the resistance of FGM under harsh thermal and environmental conditions was finally reported. In particular, the presence of this disilicate is responsible of chemical transformations in the FGM during high temperature tests
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UHLMANN, FRANZISKA JOHANNA LUISE. « Protective Ultra-High Temperature Coatings/ Ceramics (UHTCs) for Ceramic Matrix Composites in Extreme Environments ». Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2644372.

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This thesis is focused on the development of a protective coating system for Cf/SiC SiCARBONTM (Airbus trademark) materials against very high temperatures in extreme environment. Here, we concentrate on the application of this technology in combustion chambers, for example in orbital thrusters. During combustion, the composite material needs to be protected against oxidation caused by the extreme conditions. With the aim to increase the combustion performance using higher temperatures (up to 1850 °C), this thesis deals with the replacement of the current Environmental Barrier Coating (EBC) solution (CVD-SiC coating, Chemical Vapor Deposition) by an Ultra High Temperature Ceramic (UHTC) based coating system. Different challenges of this approach are, for instance, the CTE mismatch between Cf/SiC and UHTC materials and the feasibility to create a dense, thick and adherent UHTC based coating on the hot gas wall (inner wall) of a small combustion chamber. In this work, a suitable coating process (High Performance Plasma Coating process, HPPC) for inner wall coatings is selected and further developed to create ZrB2 based coatings on Cf/SiC based substrate materials. Based on a parameter study, the coating quality of HPPC based ZrB2 coatings is optimized depending on plasma current, chamber pressure, powder flow rate, preheating and cooling rate. HPPC coatings with different material combinations (ZrB2, ZrB2-SiC, ZrB2-TaC, ZrB2-LaB6) are investigated regarding coating adhesion, voids, composition and thermo-chemical behavior within a combustion chamber-like environment. To decrease the CTE mismatch between Cf/SiC substrate and a ZrB2 based coating and to increase the thermo-chemical resistance of the composite, the SiC matrix material is modified by ZrB2 and Ta additions. Cf/SiC-ZrB2-TaC composites with different SiC/ZrB2-TaC ratios are fabricated and investigated regarding microstructure, chemical composition and material properties (physical, thermo-physical, mechanical and thermo-chemical). The adhesion of HPPC based ZrB2 coatings on Cf/SiC composites is enhanced by a ZrB2 and TaC matrix modification. Based on the results, interactions between process parameters, coating composition and substrate material are analyzed and provide the base for ZrB2 based EBCs of the inner wall coatings on Cf/SiC based components. By means of the obtained findings, the potential of several material systems is derived in order to develop a protective coating for long-term applications in combustion chamber environments.
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Krossa, Alexander. « Material characteristics of new ultra high-strength steels manufactured by Giflo Steels ». Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/236243/1/Alexander%2BKrossa%2BThesis%281%29.pdf.

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This thesis has investigated the material characteristics of the new high-strength steel (HSS) produced by Giflo Steels (F-series steel) using detailed experimental studies involving ambient and elevated temperature mechanical property tests, post-fire mechanical property tests and V-Charpy notch tests for hardness. Its findings have shown that the new F-series steel has an advantage over similar HSS as it has superior post-fire mechanical properties, while retaining also the other mechanical properties within the requirements of relevant design standards.
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Livres sur le sujet "Ultra High Temperature Materials"

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Shabalin, Igor L. Ultra-High Temperature Materials IV. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07175-1.

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Shabalin, Igor L. Ultra-High Temperature Materials II. Dordrecht : Springer Netherlands, 2019. http://dx.doi.org/10.1007/978-94-024-1302-1.

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Shabalin, Igor L. Ultra-High Temperature Materials I. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9.

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Shabalin, Igor L. Ultra-High Temperature Materials III. Dordrecht : Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-2039-5.

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M, Steen, et Lohr R. D, dir. Ultra high temperature mechanical testing. Cambridge : Woodhead, 1995.

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MAX phases and ultra-high temperature ceramics for extreme environments. Hershey, PA : Engineering Science Reference, an imprint of IGI Global, 2013.

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Fahrenholtz, William G., Eric J. Wuchina, William E. Lee et Yanchun Zhou, dir. Ultra-High Temperature Ceramics. Hoboken, NJ : John Wiley & Sons, Inc, 2014. http://dx.doi.org/10.1002/9781118700853.

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Cahn, R. W., A. G. Evans et M. McLean, dir. High-temperature Structural Materials. Dordrecht : Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-0589-7.

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Price, David L. High-temperature levitated materials. Cambridge : Cambridge University Press, 2010.

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M, Willander, et Hartnagel Hans 1934-, dir. High temperature electronics. London : Chapman & Hall, 1997.

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Chapitres de livres sur le sujet "Ultra High Temperature Materials"

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Shabalin, Igor L. « Introduction ». Dans Ultra-High Temperature Materials III, 1–10. Dordrecht : Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-2039-5_1.

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Shabalin, Igor L. « Titanium Monocarbide ». Dans Ultra-High Temperature Materials III, 11–514. Dordrecht : Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-2039-5_2.

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Shabalin, Igor L. « Vanadium Monocarbide ». Dans Ultra-High Temperature Materials III, 515–707. Dordrecht : Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-2039-5_3.

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Shabalin, Igor L. « Introduction ». Dans Ultra-High Temperature Materials I, 1–6. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_1.

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Shabalin, Igor L. « Carbon (Graphene/Graphite) ». Dans Ultra-High Temperature Materials I, 7–235. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_2.

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Shabalin, Igor L. « Tungsten ». Dans Ultra-High Temperature Materials I, 237–315. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_3.

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Shabalin, Igor L. « Rhenium ». Dans Ultra-High Temperature Materials I, 317–57. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_4.

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Shabalin, Igor L. « Osmium ». Dans Ultra-High Temperature Materials I, 359–86. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_5.

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Shabalin, Igor L. « Tantalum ». Dans Ultra-High Temperature Materials I, 387–450. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_6.

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Shabalin, Igor L. « Molybdenum ». Dans Ultra-High Temperature Materials I, 451–529. Dordrecht : Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7587-9_7.

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Actes de conférences sur le sujet "Ultra High Temperature Materials"

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Gardi, Roberto, Antonio Del Vecchio et Roberto Scigliano. « In-Flight Test of Ultra High Temperature Ceramic Materials on Scramspace ». Dans 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference. Reston, Virginia : American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-3640.

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Cunzeman, Kara, et Peter Schubert. « Survey of Ultra-High Temperature Materials for Applications Above 2000 K ». Dans AIAA SPACE 2009 Conference & Exposition. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-6508.

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Wu, Xiumei. « Study on the Performance of an Ultra High Temperature Ceramic Material ». Dans 2016 4th International Conference on Mechanical Materials and Manufacturing Engineering. Paris, France : Atlantis Press, 2016. http://dx.doi.org/10.2991/mmme-16.2016.102.

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Yuh, Chao-Yi, Ling Chen, Adam Franco et Mohammad Farooque. « Review of High-Temperature Fuel Cell Hardware Materials ». Dans ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33163.

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The high-temperature carbonate fuel cell is an ultra-clean and high-efficiency power generator. Its intermediate operating temperature, ∼600–650°C, is considered optimum to facilitate fast fuel cell reaction kinetics, utilize waste heat efficiently in a combined heat and power or bottoming power cycle, and at the same time allow use of commercial commodity materials for cell hardware and balance-of-plant (BOP) piping/equipment construction. MW size power plants manufactured by FCE are being operated at customer sites throughout the world. The cell hardware and BOP materials selections are founded on many years of focused research. Microstructure and mechanical property evolution, oxidation, hot corrosion and carburization have been extensively investigated. Long-term subscale stack endurance as well as power plant field operation results to date show that the baseline hardware construction materials meet the endurance goals. Material durability is well understood and solutions are available to further extend life. This paper will review durability experience of hardware materials (cell, stack and BOP).
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Tului, M., T. Valente et G. Marino. « Plasma Sprayed Ultra High Temperature Ceramic Materials Tested in Simulated Operative Conditions ». Dans ITSC2005, sous la direction de E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p0641.

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Abstract Thermal protection systems represent the key issue for the successful re-entry of a space vehicle. Future concepts for space launchers foresee sharp aerodynamic profiles as conventional aircrafts, which offers several advantages with respect to current blunt shapes. As a drawback, aerodynamic heat flux increases dramatically and state of art hot structures materials cannot withstand them. UHTC (Ultra High Temperature Ceramics) materials are very promising candidate materials for such applications. An innovative, proprietary methodology was developed to produce, by plasma spraying deposition, a ceramic composite containing SiC particles (25 wt %) dispersed in a ZrB2 matrix. With such a technique both coatings and self standing parts were fabricated. The present paper reports the results of a development activity aiming at testing plasma sprayed real scale components in simulated operative conditions by means of a Plasma Wind Tunnel. The results of the tests showed that plasma sprayed UHTC materials can withstand very high heat flux conditions in an oxidizing environment. Abstract only; no full-text paper available.
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Scatteia, Luigi, A. Riccio, G. Rufolo, Federico De Filippis, A. Vecchio et Giuliano Marino. « PRORA-USV SHS : Ultra High Temperature Ceramic Materials for Sharp Hot Structures ». Dans AIAA/CIRA 13th International Space Planes and Hypersonics Systems and Technologies Conference. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-3266.

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« Microstructural Changes in High and Ultra High Strength Concrete Exposed to High Temperature Environments ». Dans SP-229 : Quality of Concrete Structures and Recent Advances in Concrete Materials and Testing. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14743.

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Ghoshal, Anindya, Michael J. Walock, Andy Nieto, Muthuvel Murugan, Clara Hofmeister-Mock, Marc Pepi, Luis Bravo, Andrew Wright et Jian Luo. « Experimental Analysis and Material Characterization of Ultra High Temperature Composites ». Dans ASME Turbo Expo 2021 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-60384.

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Abstract Ultra high temperature ceramic (UHTC) materials have attracted attention for hypersonic applications. Currently there is significant interest in possible gas turbine engine applications of UHTC composites as well. However, many of these materials, such as hafnium carbide, zirconium carbide, and zirconium diboride, have significant oxidation resistance and toughness limitations. In addition, these materials are very difficult to manufacture because of their high melting points. In many cases, SiC powder is incorporated into UHTCs to aid in processing and to enhance fracture toughness. This can also improve the materials’ oxidation resistance at moderately high temperatures due to a crack-healing borosilicate phase. ZrB2-SiC composites show very good oxidation resistance up to 1700 °C, due to the formation of SiO2 and ZrO2 scales in numerous prior studies. While this may limit its application to hypersonic applications (due to reduced thermal conductivity and oxidation resistance at higher temperatures), these UHTC-SiC composites may find applications in turbomachinery, as either stand-alone parts or as a component in a multi-layer system. The US Army Research Laboratory (ARL), the Naval Postgraduate School (NPS), and the University of California – San Diego (UCSD) are developing tough UHTC composites with high durability and oxidation resistance. For this paper, UHTC-SiC composites and high-entropy fluorite oxides were developed using planetary and high-energy ball milling and consolidated using spark plasma sintering. These materials were evaluated for their oxidation-resistance, ablation-resistance, and thermal cycling behavior under a DoD/OSD-funded Laboratory University Collaborative Initiative (LUCI) Fellowship and DoD Vannevar Bush Fellowship Program. In the present paper experimental results and post-test material characterization of SPS sintered ZrB2, ZrB2+SiC, ZrB2+SiC+HfC, HfC+SiC, and HfC+ZrB2 pellets subjected to ablation test are presented.
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Garino, Gia. « Fracture strength of multi-component ultra-high temperature carbides ». Dans MME Undergraduate Research Symposium. Florida International University, 2022. http://dx.doi.org/10.25148/mmeurs.010564.

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Ultra-high temperature ceramics (UHTCs) have emerged as a promising material for next generation re-entry hypersonic vehicles due to high melting point (>3000 °C), and high mechanical properties and oxidation resistance. Yet none of the unary UHTCs can satisfy the whole gamut of demanding requirements for aerospace applications. Recently, the single-phase solid-solution formation in a multi-component ultra-high temperature ceramic (MC-UHTC) materials have gained interest due to their superior thermo-mechanical properties compared to conventional UHTCs. Herein, a systematic approach was used to fabricate binary (Ta, Nb)C, ternary (Ta, Nb, Hf)C, and quaternary (Ta, Nb, Hf, Ti)C UHTCs by gradual addition of UHTC components via spark plasma sintering (SPS). Fracture strength of the samples was measured using 4-point bend testing to understand the effect of UHTC components on the failure behavior of MC-UHTCs. A high-speed camera was also used to visualize and record the failure in each sample. The results showed that the quaternary UHTC has a fracture strength of ~351 MPa, which is ~227% and 10% higher than binary and ternary samples, respectively. Enhancement in the fracture strength has been attributed to increase in the entropy of a MC-UHTC with gradual addition of UHTC component. The present findings promote MC-UHTCs as a candidate damage tolerant structural material for aerospace applications.
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Ren, Yuxing, et David CC Lam. « Low Temperature Processable Ultra-Low Dielectric Porous Polyimide for High Frequency Applications ». Dans 2006 International Conference on Electronic Materials and Packaging. IEEE, 2006. http://dx.doi.org/10.1109/emap.2006.4430666.

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Rapports d'organisations sur le sujet "Ultra High Temperature Materials"

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Perepezko, John H. New Oxide Materials for an Ultra High Temperature Environment. Office of Scientific and Technical Information (OSTI), novembre 2017. http://dx.doi.org/10.2172/1408528.

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Hyers, Robert W. Non-contact Measurement of Creep in Ultra-High-Temperature Materials. Fort Belvoir, VA : Defense Technical Information Center, novembre 2009. http://dx.doi.org/10.21236/ada524249.

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Marschall, Jochen. Testing and Modeling Ultra-High Temperature Ceramic (UHTC) Materials for Hypersonic Flight. Fort Belvoir, VA : Defense Technical Information Center, novembre 2011. http://dx.doi.org/10.21236/ada553782.

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

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Gupta, Mool C., Chen-Nan Sun et Tyson Baldridge. Preparation of Oxidation-Resistant Ultra High Melting Temperature Materials and Structures Using Laser Method. Fort Belvoir, VA : Defense Technical Information Center, juin 2009. http://dx.doi.org/10.21236/ada583075.

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Ogale, Amod A. Surface Anchoring of Nematic Phase on Carbon Nanotubes : Nanostructure of Ultra-High Temperature Materials. Office of Scientific and Technical Information (OSTI), avril 2012. http://dx.doi.org/10.2172/1039158.

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Charit, Indrajit, Darryl Butt, Megan Frary et Mark Carroll. Fabrication of Tungsten-Rhenium Cladding materials via Spark Plasma Sintering for Ultra High Temperature Reactor Applications. Office of Scientific and Technical Information (OSTI), novembre 2012. http://dx.doi.org/10.2172/1054226.

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Howard, Isaac, Thomas Allard, Ashley Carey, Matthew Priddy, Alta Knizley et Jameson Shannon. Development of CORPS-STIF 1.0 with application to ultra-high performance concrete (UHPC). Engineer Research and Development Center (U.S.), avril 2021. http://dx.doi.org/10.21079/11681/40440.

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This report introduces the first release of CORPS-STIF (Concrete Observations Repository and Predictive Software – Structural and Thermodynamical Integrated Framework). CORPS-STIF is envisioned to be used as a tool to optimize material constituents and geometries of mass concrete placements specifically for ultra-high performance concretes (UHPCs). An observations repository (OR) containing results of 649 mechanical property tests and 10 thermodynamical tests were recorded to be used as inputs for current and future releases. A thermodynamical integrated framework (TIF) was developed where the heat transfer coefficient was a function of temperature and determined at each time step. A structural integrated framework (SIF) modeled strength development in cylinders that underwent isothermal curing. CORPS-STIF represents a step toward understanding and predicting strength gain of UHPC for full-scale structures and specifically in mass concrete.
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Lyding, Joseph. Ultra High Speed High Temperature Motor. Office of Scientific and Technical Information (OSTI), avril 2022. http://dx.doi.org/10.2172/1876185.

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Lee, G. Materials for ultra-high vacuum. Office of Scientific and Technical Information (OSTI), août 1989. http://dx.doi.org/10.2172/6985168.

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