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Gotowa bibliografia na temat „Al SiC MMCs”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Al SiC MMCs"

Huang, Song Jeng, Yo Zhi Dai i Yeau Ren Jeng. "Volume Fraction Effects of Silicon Carbide on the Wear Behavior of SiC_p-Reinforced Magnesium Matrix Composites". Advanced Materials Research 152-153 (październik 2010): 11–18. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.11.

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This paper investigated the volume fraction effect of micro-sized SiC on the tribological behavior of SiCp reinforced AZ91D Mg-based metal-matrix composites (MMCs). The Mg MMCs were prepared by the melt-stirring technique for wear tests. The hardness and coefficient of friction of Mg MMCs increase as increasing volume fraction of SiC particle in MMCs. The SiCp/AZ91D MMCs exhibit superior wear resistance under lower and moderate sliding condition. However, the effects of the SiC particle reinforcements on wear resistance are not as conclusive under severe sliding condition (50N-1500 rpm for all vol.% of MMCs, 50N-1000rpm for 3 vol. % MMCs), since the matrix of MMCs were softened at elevated temperature under such severe condition. However, the incorporation of SiC particles could enhance the wear resistance of AZ91D matrix alloy for most of the sliding conditions.

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Thirugnanam, S., G. Ananth, T. Muthu Krishnan i Tewedaj Tariku Olkeba. "Microstructure and Mechanical Characteristics of Stir-Casted AA6351 Alloy and Reinforced with Nanosilicon Carbide Particles". Journal of Nanomaterials 2023 (20.04.2023): 1–6. http://dx.doi.org/10.1155/2023/7858827.

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The main aim of this research is to analyze the mechanical performances of the influence of silicon carbide (SiC) particles with AA6351 aluminum alloy. The aluminum metal matrix composites were prepared with liquefying stir casting to produce the metal matrix composites (MMCs). The following weight fractions are AA6351-0% SiC, AA6351-2.5% SiC, AA6351-5% SiC, and AA6351-7.5% SiC utilized to compose the MMCs. The mechanical performances like hardness, flexural, impact, compressive, and tensile studies were investigated on the processed MMCs. The scanning electron microscope (SEM) was employed to examine the strengthened particle of SiC. During the SEM examinations, uniformly dispersed SiC-strengthened particles were analyzed. The entire MMCs specimens achieve greater mechanical characteristics; the specimen fabricated with a maximum volume fraction of 7.5 wt% of SiC accumulates higher strength than the other volume fractions samples. The SiC plays a very tedious role in improving mechanical attributes. The fabricated MMCs were highly utilized in the applications of automotive and aerospace usages. This application is fully employed with lesser weight and maximum strength conditions to fulfill the mechanical performances. The stir-casting process was a highly efficient technique to compose better MMCs to achieve greater strength.

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He, Chun Lin, Jian Ming Wang i Qing Kui Cai. "Effect of SiC Particle Size on Microstructure and Tensile Behavior of Aluminum Matrix Composites". Advanced Materials Research 183-185 (styczeń 2011): 2129–33. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.2129.

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The aluminum metal matrix composites (Al MMCs) reinforced by SiC particles with different sizes (25 nm, 150 nm and 3.5 m) were fabricated by powder metallurgy technique, and the microstructure and tensile properties of the Al MMCs were investigated. When the volume fraction of SiC particles is fixed to be 5 %, the Al MMCs reinforced by nanosized and submicron particles exhibit much higher ultimate tensile strength and yield strength, and much lower ductility compared with those of the non-reinforced aluminum. However, for the MMC reinforced by 3.5 m SiC particles, almost no strengthening effect is found. The strengthening effect of the Al MMCs is analyzed in terms of dislocation mechanism. Moreover, the tensile fracture surface shows that the damage mechanism of the Al MMCs can be changed as the size of SiC particles is changed.

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Cui, Yong Yan, Shi Ming Hu i Zhen Xing Yang. "Reserach on Rheology of Biodegradable Soy Protein Materials". Advanced Materials Research 183-185 (styczeń 2011): 2134–38. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.2134.

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The aluminum metal matrix composites (Al MMCs) reinforced by SiC particles with different sizes (25 nm, 150 nm and 3.5 μm) were fabricated by powder metallurgy technique, and the microstructure and tensile properties of the Al MMCs were investigated. When the volume fraction of SiC particles is fixed to be 5 %, the Al MMCs reinforced by nanosized and submicron particles exhibit much higher ultimate tensile strength and yield strength, and much lower ductility compared with those of the non-reinforced aluminum. However, for the MMC reinforced by 3.5 m SiC particles, almost no strengthening effect is found. The strengthening effect of the Al MMCs is analyzed in terms of dislocation mechanism. Moreover, the tensile fracture surface shows that the damage mechanism of the Al MMCs can be changed as the size of SiC particles is changed.

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Noori, Muna, Hazim Faleh, Chisamera Mihai, Gigel Neagu, Florin Ştefănescu i Eduard Marius Stefan. "Properties of Aluminium-SiC_P Composites (Review)". Advanced Materials Research 1143 (luty 2017): 72–78. http://dx.doi.org/10.4028/www.scientific.net/amr.1143.72.

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Aluminium-based Metal matrix composites (MMCs) have become increasingly used for structural applications in various industrial sectors because of their excellent specific stiffness and specific strength. Discontinuously reinforced (DR) Al/SiC metal-matrix composites (MMCs) are modern, lightweight materials which have a very attractive combination of material properties and price. The use of DR Al/SiC MMCs is mostly limited to the military and aerospace, however, these materials are now beginning to penetrate civilian applications. Besides the mechanical behavior, knowledge of the corrosion resistance of DR Al/SiC MMCs is very important, and so the corrosion resistance of Al/SiC composites has been investigated and discussed in comparison with a conventional Al alloy of similar composition.

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He, Chun Lin, Jian Ming Wang i Qing Kui Cai. "Effects of Particle Size and Volume Fraction on Extrusion Texture of SiC_p/Al Metal Matrix Composites". Advanced Materials Research 194-196 (luty 2011): 1437–41. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1437.

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The texture development was investigated in the extruded Al and Al metal matrix composites (MMCs) reinforced with SiC particles of different sizes and volume fractions. During extrusion, both the unreinforced Al and the MMCs develop a strong fiber texture with two components: <111> and <100>. When SiC is introduced into aluminum, the main component of texture is not modified, but the intensity of the component evolves with the volume fraction and average size of SiC particles. For the MMCs reinforced with 3.5μm SiC particles, the texture intensity of the Al matrix tends to decrease as the SiC volume fraction increases, and it is lower than that in the unreinforced Al. However, for the MMCs reinforced with 25 nm and 150 nm SiC particles, the texture intensity of the Al matrix is higher than that in the unreinforced matrix, and it increases with increasing the SiC volume fraction. It is found that superfine particles may introduce some new component into the deformation texture, and the texture intensity increases as the SiC particle size decreases.

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He, Chun Lin, De Yuan Lou, Jian Ming Wang i Qing Kui Cai. "Tensile Properties of Aluminum Matrix Composites Reinforced with Submicron SiC Particles". Advanced Materials Research 150-151 (październik 2010): 538–41. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.538.

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The submicron SiC particulates reinforced aluminum metal matrix composites (Al MMCs) were fabricated by powder metallurgy technique, and their microstructure and tensile properties were investigated. The results show that the Al MMCs obviously exhibit an increase in ultimate tensile strength and yield strength due to both dislocation density strengthening and dispersion strengthening mechanisms, and a decrease in elongation with increasing concentration of SiC particles compared with those of the unreinforced Al due to the agglomeration of SiC superfine particles. The tensile fracture surfaces show that the damage mechanism of the Al MMCs can change with the concentrations of SiC superfine particles and the cracks easily originate from the SiC agglomerations.

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Altinkök, Necat. "Mechanical Properties and Wear Behaviour of Al2O3/SiCp Reinforced Aluminium-Based MMCs Produced by the Stir Casting Technique". Advanced Composites Letters 22, nr 4 (lipiec 2013): 096369351302200. http://dx.doi.org/10.1177/096369351302200402.

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In this study, initially Al2O3/SiC powder mix was prepared by reacting of aqueous solution of aluminium sulphate, ammonium sulphate and water containing SiC particles at 1200°C. 10 wt% of this hybrid ceramic powder with different sized SiC particles was added to a liquid Al matrix alloy during mechanical stirring between solidus and liqudus under inert conditions. Then hybrid Metal Matrix Composites (MMCs) was produced. The effect of reinforced particle size on tensile strength, bending strength, hardness resistance and wear resistance properties of hybrid reinforced MMCs were investigated. The mechanical test results revealed that bending, tensile strength and hardness resistance of the composites increased with decrease in ductility, with decrease size of the reinforcing SiC particulates in the aluminium alloy metal matrix. The wear behaviour of the hybrid ceramic reinforced aluminium matrix composites was investigated using pin-on-disc test at room temperature under dry conditions. Wear tests showed that the wear resistance of MMCs increased with increasing reinforced Al2O3/SiC particle size. Comparing the fine particle size MMCs with the coarse particle size MMCs were easily pulled out whole from the matrix. Microstructural examination showed that as well as coarse SiC particle reinforcement, a fine alumina particle reinforcement phase was observed within the aluminium matrix (A332).

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Ravikumar, M., R. Suresh, H. N. Reddappa, Y. S. Ram Mohan, C. R. Nagaraja i E. R. Babu. "Investigations on tensile fractography and wear characteristics of Al7075-Al2O3-SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques". Frattura ed Integrità Strutturale 15, nr 56 (28.03.2021): 160–70. http://dx.doi.org/10.3221/igf-esis.56.13.

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The Al2O3-SiC reinforced Al7075 Metal Matrix Composite (MMCs) is fabricated through liquid metallurgical technique. Ceramic particulates were amalgamated into aluminium alloy to achieve improved mechanical properties and wear resistance. Al-7075/Al2O3/SiC hybrid MMCs were produced by reinforcing 2%, 3%, 4% and 5% of Al2O3 and 3%, 5% and 7% of SiC particles. Microstructural analysis was carried out to evaluate the uniform dispersal of reinforcing particulates within the base matrix. The output results indicate that the mechanical properties of the hybrid MMCs enhanced by increase the wt. % of ceramic particulates. Tensile fractography results show the internal fracture structure of the tensile test specimens in which the particulates fracture and pullouts were observed. The wear characteristics of developed composites are studied using pin on disc apparatus. The high wear resistance is observed at 5% Al2O3 + 7% SiC reinforced MMCs.

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Afandi, Yusuf, Anne Zulfia, Dedi Priadi i I. Nyoman Jujur. "Formation and Characterization of MMCs Alloy Al-5%Cu-4%Mg/SiC(p) by Thixoforming Process". Advanced Materials Research 789 (wrzesień 2013): 56–59. http://dx.doi.org/10.4028/www.scientific.net/amr.789.56.

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Metal matrix composites (MMCs) are new materials, which are very essential for industry manufacture applications, such as automotive, aerospace and military. So far, an enhancement of the MMCs hardness has been interestingly studied. In this paper, we study the formation of Al-5%Cu-4%Mg matrix with the reinforcement of SiC by thixoforming process. Several important parameters for increasing the MMCs hardness, such as volume fraction of reinforcement, ageing time and temperature, are investigated. It is found from the microstructure analysis that the distribution of SiC particles is homogen for both MMCs with 5 vf.% SiC and 10 vf.% SiC. We also found fine, globular and non-dendritic structures, indicating that an appropriate structure of thixoforming process is obtained. From the hardness measurement, the hardness values are influenced by the reinforcement, thixoprocess and ageing. Our experimental results indicates that such parameters have to be considered in order to obtain the optimum performance of Al-5%Cu-4%Mg matrix.

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Rozprawy doktorskie na temat "Al SiC MMCs"

Sun, Li. "Micro-galvanic corrosion cells associated with SiC/Al MMCs". Thesis, University of Surrey, 1995. http://epubs.surrey.ac.uk/843324/.

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The corrosion of SiCp / 6061 A1 in 3% NaCl solution, at pH values of 3.8, 7.2 and 10.2, has been studied using SEM and combined scanning Auger electron/ X-ray microscopy. The MMC, fabricated by powder metallurgy, contains approximately 15 percent (volume) SiC as < 10 mum particles. Scatter diagrams are applied to analyze elemental maps created by scanning Auger microscopy. The experiments reveal that some impurity elements such as Fe, Ti etc., introduced during fabrication, form intermetallic compounds and that these are the dominant factors causing micro-galvanic corrosion. The Auger maps show, by inspection, that oxygen is enriched after exposure around these intermetallics. This has been confirmed by using scatter diagrams to analyze the data contained within the map. The phenomenon is probably caused by the dissolution of aluminium, resulting in the deposition of porous corrosion products such as Al(OH)3 and AlOOH. Because of a low overpotential for oxygen reduction, the intermetallic compounds are expected to act as cathodes. This is confirmed by the finding of magnesium hydroxide on the surface of the intermetallics after exposure of the specimen in MgCl2 solution. It is shown that the onset of this deposition can be used to estimate the cathodic current density at the cathode. Current density at the SiC particles, estimated by this method is negligible, suggesting that the principal cause of corrosion is found in the interaction between the aluminium alloy and the intermetallics. The same method is used for SiC, / 6061 A1 MMC. Intermetallic particles are found much more likely to be located at a fibre / matrix interface, and they are still a sensitive factor for localized corrosion. There is some Cr in the Fe-containing intermetallics in this matrix, this type of intermetallic is not very susceptible to micro-galvanic corrosion. Another different aspect is that the reinforcing material in SiCf / 6061 A1 MMC is directly associated with the micro-corrosion cell. The reinforcing SiC fibre belongs to the SCS series which consists of three different layers. The SiC is grown on a carbon core by chemical vapour deposition and a protective coating is applied on the outside of the fibre. This coating is mainly composed of carbon which is slightly enriched in silicon at the surface. In this investigation we found that carbon core and carbon coating act as cathodes and form a galvanic cell with surrounding aluminium alloy. This is confirmed by the magnesium decoration method. Electrochemical techniques are also used. Several kinds of SiC fibres and graphite fibres are cathodically polarized in 3% NaCl solution. By comparison with the anodic polarization curve of A1 alloy, the galvanic cells between A1 alloy and carbon core or protective coating are confirmed. There is no galvanic effect between A1 and pure SiC. Al3Fe is extracted from intermetallic enriched A1 alloy, and the electrochemical performance of this intermetallic is investigated.

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Kurimura, Takayuki. "Residual stress effects on crack initiation and growth in Al/Sic MMCs". Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/273053.

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Lemnifi, Ahmed. "Influence of excimer laser surface melting on microstructure and corrosion behaviour of AA6061-T6 alloy and SiCp/AA6061-T6 composite". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/influence-of-excimer-laser-surface-melting-on-microstructure-and-corrosion-behaviour-of-aa6061t6-alloy-and-sicpaa6061t6-composite(5b945607-0479-411b-bb08-61e3c96a606e).html.

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This thesis presents an investigation of excimer laser surface melting (LSM) on AA6061-T6 alloy and SiCp/AA6061-T6 composite in terms of microstructure and corrosion behaviour. Hardness and wear resistance of the melted layer for both materials were also evaluated and compared with the untreated specimen to understand if the improvement of the corrosion resistance could be achieved without sacrificing the wear resistance. The intermetallic particles within the aluminium matrix are believed to initiate of both galvanic and pitting corrosion for both materials. To effectively dissolve these intermetallic particles, laser fluence from 1 to 8.5 J/cm2 with a number of pulses from 10, 25 to 50 were selected to achieve an optimisation of the LSM condition. It was found that the increase of laser fluence increased the melt depth, but also promoted the formation of defects such as micro-cracks and pores. For AA6061-T6 alloy, under the best laser condition (3 J/cm2 with 50 pulses), the amount of large intermetallic particles (2-10 Âµm), such as AlFeSi, AlFeMnSi and Mg2Si, were significantly reduced resulting in the formation of a relatively homogeneous and defect-free melt layer with only some small randomly distributed of intermetallic precipitates. For the SiCp/AA6061-T6 composite, under the best laser condition (6 J/cm2 with 25 pulses), decomposition of SiC particles was achieved as well as the dissolution of large AlMgSiCr and AlFeSi intermetallic particles in the melt layer. The melt layer had a relatively complex microstructure consisting of three different regions. MgO was found at the bottom of the melted layer which was discontinuous along the interface between the melted region and bulk material or in some places, at the bottom of the melted layer. The corrosion behaviour of both materials before and after LSM was evaluated using electrochemical measurements and immersion test in deaerated 0.6 M NaCl solution. After LSM the AA6061-T6 with and without SiC showed a better corrosion resistance compared with untreated alloys. The pitting potential of the LSM for both materials was shifted to a more positive value with a significant reduction of the passivation current density. In addition, an intergranular corrosion test based on the standard ASTM G110-92 showed that the LSM had significantly improved the corrosion resistance of both materials due to dissolution of intermetallic particles as well as the removal of the SiC particles in the composite material within the melted regions. In addition, the wear resistance of as-received SiCp/AA6061-T6 composites was found to be much higher than that of the LSM specimen. This is attributed to the decomposition of the majority of the SiCp in the melted region since the contribution to the hardness from the SiC particle in the untreated specimen is much greater that the Si-rich region in the melt layer after LSM.

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Shih, Nai-Chien. "The mechanical properties of SiC fibre for high temperature MMC applications". Thesis, Cranfield University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385925.

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Xia, Ji. "TENSION AND FATIGUE BEHAVIOR OF AL-2124/SIC-PARTICULATE METAL-MATRIX COMPOSITES". Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1548169132710822.

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Coelho, Reginaldo Teixeira. "The machinability of aluminium-based SiC reinforced metal matrix composite (MMC) alloy with emphasis on hole production". Thesis, University of Birmingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340966.

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Stone, Ian C. "The characterisation of the spatial distribution of reinforcement in powder metallurgy route Al/SiCp MMCs and its effect on their processing and properties". Thesis, University of Surrey, 1994. http://epubs.surrey.ac.uk/804376/.

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Moretti, Luca. "Caratterizzazione di profili estrusi in lega di magnesio ZM21 caricata con carburo di silicio". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6095/.

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L’attività sperimentale presentata in questo elaborato è volta a conoscere le proprietà meccaniche di una lega di magnesio rinforzata con particelle ceramiche (Carburo di silicio SiC). Scopo del lavoro sarà pertanto il confronto fra le proprietà meccaniche del materiale base ZM21 rispetto al materiale prodotto in Israele con rinforzo di carburo di silicio, con particolare riferimento alle proprietà a trazione, a compressione e alla distribuzione di particelle nella matrice (analisi metallografica).

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Sayama, Rafael Branco Nakatsubata. "Efeitos da soldagem por laser de fibra de Yb na microestrutura do compósito A356/SiCp". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-31052016-143201/.

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Materiais compósitos são projetados e fabricados para várias aplicações de alto desempenho, incluindo componentes para os segmentos automobilístico, aeroespacial, aeronáutico, naval, de defesa, de óleo e gás, energia eólica e até equipamentos esportivos. Porém, a união por soldagem de Compósitos de Matriz Metálica de Alumínio (Al-CMM) ainda é um grande obstáculo para a maior disseminação desta classe de materiais estruturais. As mudanças microestruturais decorrentes do ciclo de soldagem e/ou do tratamento térmico afetam sensivelmente as propriedades mecânicas e físico-químicas finais da junta e do metal base nas proximidades de mesma, daí a importância de se estudar a evolução microestrutural que prospera nestas etapas. O presente trabalho caracterizou a microestrutura do compósito liga-A356/SiCp soldado por laser de fibra de Itérbio, empregando-se nessa tarefa técnicas de microscopia óptica, radiografia e microscopia eletrônica de varredura, assim como difração de raios-X e de elétrons retroespalhados, ensaio instrumentado de dureza e microtomografia computadorizada. O foco das análises realizadas restringiu-se à geometria dos cordões de solda, à expulsão de SiC particulado da zona soldada, à volatilização de elementos químicos da poça de soldagem, à formação de precipitados fragilizantes de Al4SiC4 em formato de agulhas no cordão de solda e à determinação das regiões com concentração de poros, todos estes fenômenos tendo efeitos nocivos, em maior ou menor extensão, no desempenho global da junta do Al-CMM soldada a laser, notadamente em suas propriedades mecânicas e eletroquímicas.
Microstructural materials composites are designed and manufactured for various high performance applications, including components for different industries like automobile, aerospace, aeronautical, naval, defense, oil and gas, wind energy and even sports equipment. However, the junction by welding of Aluminum Metal Matrix Composite (Al-MMC) is still a major obstacle to the further spread of this class of structural materials. The microstructural changes resulting from the welding cycle and / or post-weld heat treatment significantly affect the final mechanical and physicochemical properties of the joint and the base metal near it, hence the importance of studying the microstructural evolution that thrives in these steps. This study aims to characterize the microstructure of the composite alloy-A356 / SiCp welding by Ytterbium fiber laser, using optical microscopy, X-ray, scanning electron microscopy, X-ray diffraction, electron backscatter diffraction, instrumented test hardness and computed microtomography. The focus of the analyzes was restricted to the geometry of the weld bead, the particulate SiC expulsion of the welded zone, volatilization of chemical elements from the welding zone, formation of precipitates embrittlement of Al4SiC4 in needle shape in the weld bead and determining the concentration of regions with pores, all these phenomena have harmful effects to a greater or lesser extent, the overall performance of the joining Al-CMM laser welded, mainly in their mechanical and electrochemical properties.

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Boutry, Arthur. "Theoretical and experimental evaluation of the Integrated gate-commutated thyristor (IGCT) as a switch for Modular Multi Level Converters (MMC)". Thesis, Lyon, 2021. http://www.theses.fr/2021LYSEI095.

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Une étude sur la réduction/suppression de l'inductance de limitation di/dt pour IGCTs et du clamp RCD en utilisant des diodes rapides en silicium (Si) et des diodes en carbure de silicium (SiC) dans les convertisseurs multiniveaux modulaires (MMC). Cette thèse contient :- Analyse des sous-modules de MMC HVDC existants.- Évaluation de l'intérêt des IGCTs dans les sous-modules MMC HVDC et comparaison des pertes avec les IGBT, en utilisant des facteurs de mérite spécifiques aux MMC créés dans cette thèse.- Test de double pulse avec diode à récupération rapide dans un module plastique pour tenter de réduire et supprimer l'inductance limitant le di/dt.- Packaging de puces de diodes SiC PiN à haute tension et courant élevé, test avec IGCT dans le même montage, pour tenter de réduire et supprimer l'inductance limite di/dt, et analyser les spécificités de la diode SiC dans ce montage
A study on Integrated gate-commutated thyristors (IGCT) di/dt limiting inductance and RCD-clamp reduction/suppression using plastic module silicon (Si) fast recovery diodes and silicon carbide (SiC) diodes, in Modular Multilevel Converters (MMC). This PhD contains:- Analysis of existing HVDC MMC Submodules.- Assessment of the interest of the IGCT in HVDC MMC Submodules and losses comparison with IGBTs, using MMC-specific figures-of-merit created in this thesis.- Double pulse test with fast recovery diode in plastic module to attempt to reduce and suppress the limiting di/dt inductor.- Packaging of High-Voltage High-Current SiC PiN diode dies, test with IGCT in the same setup to attempt to reduce and suppress the limiting di/dt inductor and analyze the specificities of the SiC diode in this setup

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Książki na temat "Al SiC MMCs"

Coelho, Reginaldo Teixeira. The machinability of aluminium-based SiC reinforced metal matrix composite (MMC) alloy with emphasis on hole production. Birmingham: University of Birmingham, 1995.

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B, Gurganus T., Walker J. A. 1939- i Langley Research Center, red. Development and characterization of powder metallurgy (PM) 2XXX series Al alloy products and metal matrix composite (MMC 2XXX Al/SiC materials for high temperature aircraft structural applications. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1992.

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Mavi, Jagroop, Anne C. Boat i Senthilkumar Sadhasivam. Myelomeningocele Repair. Redaktorzy Erin S. Williams, Olutoyin A. Olutoye, Catherine P. Seipel i Titilopemi A. O. Aina. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190678333.003.0051.

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Myelomeningocele (MMC) is a spinal birth defect associated with significant morbidity directly related to the exposure of meninges and neural structures. Further neurological dysfunction may occur secondary to Chiari II malformation and hydrocephalus. MMC repair is typically performed postnatally within the first 24 to 48 hours of life due to the concern for infection. Prenatal MMC correction is performed in select cases after studies showed improved neurological outcomes. Anesthesia for MMC repairs can be challenging, and appropriate screening should be performed preoperatively. During postnatal repair, care must be taken when positioning the infant to avoid any pressure on the MMC sac. Anesthesia can be maintained with a combination of inhalational agents and intravenous opioids. Prenatal MMC repairs must consider both fetal and maternal safety outcomes. They can be performed through both open and fetoscopic routes, with anesthesia focused on maintaining maternal blood pressure, optimizing uterine relaxation, and adequate pain control.

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Cook, J. Control of Fibre Matrix Interactions in SiC/Ti MMC: Summary Report of a Programme Carried Out by a Consortium of Laboratories. European Communities / Union (EUR-OP/OOPEC/OPOCE), 1991.

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Mehta, Gautam, Bilal Iqbal i Deborah Bowman. Clinical Medicine for the MRCP PACES. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780199557493.001.0001.

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Volume 2 of a two volume MRCP text, this book includes cases which mimic the style and approach of the MRCP PACES exam. Clinical Medicine for MRCP PACES will equip the candidate attempting the MRCP examination with the skills and knowledge necessary for success, and will also provide an overview of evidence-based medicine for competency-based training. Throughout this and Volume 1, the authors explore all aspects of the candidate's performance, from clinical examination, to presentation, communication and medical ethics and up-to-date clinical evidence. Volume 2 includes 75 cases and covers Stations 2 and 4: Station 2 covers history taking skills; Station 4 covers communication skills and ethics. This book follows a structured approach to history taking and communication issues, which not only facilitates learning and understanding, but is also required for other workplace based assessments. This book will continue with the theme of Volume 1, in providing candidates with an accurate, authoritative, evidence-based companion for both the MRCP examination, and postgraduate training in the MMC era. Visit our website for details of our range of titles for MRCP and more in the Oxford Specialty Training series at www.oup.com/uk/medicine/ost http://www.oup.com/uk/medicine/ost Advance praise for Clinical Medicine for MRCP PACES: "The authors have produced two volumes packed with the information needed to pass PACES and to practise high quality medicine. While written specifically for those aspiring to be physicians these volumes deserve to be widely read by all with an interest in clinical medicine. Candidates in particular and patients have good reason to welcome these volumes." Sir Graeme Catto

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Części książek na temat "Al SiC MMCs"

Venugopal, P., i N. Natarajan. "Modeling, Optimization and Corrosion Analysis of FS Welded LM25-SiC MMCs". W Lecture Notes in Mechanical Engineering, 887–901. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9809-8_63.

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Akbulut, H., i M. Durman. "Thermal Expansion and Wear Properties of Centrifugally Produced Al-Si/SiC MMCs". W Functional Gradient Materials and Surface Layers Prepared by Fine Particles Technology, 217–23. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0702-3_22.

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Sun, Fang Hong, X. K. Li, Y. Wang i Ming Chen. "Studies on the Grinding Characteristics of SiC Particle Reinforced Aluminum-Based MMCs". W Advances in Grinding and Abrasive Technology XIII, 261–65. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-986-5.261.

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Salamone, S., B. Givens, K. Kremer i M. Aghajanian. "Effect of Particle Loading on Properties, Damping, and Wear of AL/SIC MMCS". W Mechanical Properties and Performance of Engineering Ceramics and Composites X, 65–72. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119211310.ch8.

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Shi, Qing-Yu, Kai Sun, Wei Wang i Gao-qiang Chen. "Flow behavior of SiC particles as tracer material during the fabrication of MMCs by friction stir processing". W Friction Stir Welding and Processing VII, 29–38. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48108-1_4.

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Shi, Qing-Yu, Kai Sun, Wei Wang i Gao-qiang Chen. "Flow Behavior of SiC Particles as Tracer Material during the Fabrication of MMCs by Friction Stir Processing". W Friction Stir Welding and Processing VII, 29–38. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118658345.ch4.

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Singh, Sarbjit, Inderdeep Singh, Akshay Dvivedi i J. Paulo Davim. "SiCp-Reinforced Al6063 MMCs: Mechanical Behavior and Microstructural Analysis". W Lecture Notes in Mechanical Engineering, 451–64. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1859-3_42.

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Pickard, S., i B. Derby. "Creep Rupture of 1100 Series Al/SiC Particulate MMC’S". W Developments in the Science and Technology of Composite Materials, 199–204. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1123-9_27.

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Kumar, Manish, Alakesh Manna, S. K. Mangal i Anup Malik. "An Experimental Investigation During Wire Electrical Discharge Machining of Al/SiC-MMC". W Lecture Notes in Mechanical Engineering, 261–71. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1859-3_24.

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Coelho, R. T., S. Yamada, T. le Roux, D. K. Aspinwall i M. L. H. Wise. "Conventional Machining of an Aluminium Based SiC Reinforced Metal Matrix Composite (MMC) Alloy". W Proceedings of the Thirtieth International MATADOR Conference, 125–33. London: Macmillan Education UK, 1993. http://dx.doi.org/10.1007/978-1-349-13255-3_17.

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Streszczenia konferencji na temat "Al SiC MMCs"

Li, Xiaoping, i W. K. H. Seah. "Modeling of Tool Wear Acceleration in Relation to the Reinforcement Percentage in Cutting of Metal Matrix Composites". W ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0695.

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Abstract A comprehensive study of the tool wear mechanism in cutting of metal matrix composites (MMCs) and its dependence on the percentage of reinforcement in the MMCs is presented. The results from experimental cutting of Aluminium alloy-Silicon Carbide Metal Matrix Composite (Al-SiC MMC) with tungsten carbide tools show that the main mechanism of tool wear in cutting of Al-SiC MMC includes two-body abrasion and three-body abrasion. The abrasive wear of the tool is accelerated when the percentage of the reinforcement in the MMC exceeds a critical value. The wear acceleration is caused by the interference between the reinforcement particles. The interference is associated with a critical weight percentage of the reinforcement in the MMC. The critical weight percentage of reinforcement is a function of the densities of the reinforcement and the matrix as well as the size of the reinforcement particles and the radius of the tool cutting edge. It does not vary with cutting conditions. An analytical model for the critical reinforcement percentage of MMCs is developed and verified with experimental results. The model is used to develop a map showing the critical reinforcement percentages of MMCs varying with the size of the reinforcement particles and the radius of the tool cutting edge.

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Songmene, V., T. F. Stephenson i A. E. M. Warner. "Machinability of Graphitic Silicon Carbide Aluminum Metal Matrix Composite GrA-Ni™". W ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-1152.

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Abstract Metal-Matrix Composites (MMC) are being developed for high wear resistance applications. A new MMC, a graphitic aluminum metal matrix composite consisting of an aluminum matrix reinforced with SiC particles and nickel-coated graphite particles, GrA-Ni™, has been developed by INCO Limited. The addition of nickel-coated graphite to SiC particulate reinforced aluminum plays a similar role to flake graphite in grey cast iron. However, like other MMCs, this composite is demanding in terms of requirements for cutting conditions and cutting tool materials. This paper assesses the machining data for this new composite, in regards to tool life, surface finish and cutting forces. The tests included milling, turning, and drilling conducted with carbide and diamond tools. The test results showed that GrA-Ni™ with 10 vol% SiC – 5 vol% Gr, is easier to machine than existing aluminum composites reinforced with SiC particles, such as 20 vol% SiC reinforced aluminum composite.

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Anandan, Nishita, i Mamidala Ramulu. "Experimental Investigation of Peripheral Milling of Functionally Gradient Al-SiC Metal Matrix Composite". W ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71648.

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Metal matrix composites (MMCs) offer superior mechanical and thermal properties, but the poor machinability of these composites hinders their wide application [1,2]. The machinability of the MMCs are found to be largely dependent on the particle size and volume fraction of the reinforcements used. Experimental investigation on process modeling of MMCs by milling is undertaken. In this study, peripheral milling of functionally gradient concentration of SiC in aluminum matrix using carbide tools is discussed. The process conditions were varied namely, the feed was varied from 0.1 mm/rev to 0.3 mm/rev and the speed from 1000 to 5000 rpm with a constant depth of cut of 1.27mm. The variation of cutting force, surface roughness and cut surface morphology with varying SiC particle distribution, feed and speed are reported. The interaction of the cutting edge with hard SiC particles in Al matrix was also studied using the scanning electron microscopy (SEM). The cutting force and surface roughness were found to increase with increasing volume fraction of SiC particles. Preliminary observation showed that the SiC particles were either removed from the matrix by debonding due to mismatch of thermal coefficients or were fractured by the action of the cutting edge or were pushed into the aluminum matrix.

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Muthukrishnan, N., Ravi Mohan, M. S. Thiagarajan i J. Venugopal. "Modeling Machinability Parameters of Turning Al-SiC (10p) MMC by Artificial Neural Network". W ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72329.

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The paper presents the results of an experimental investigation on the machinability of fabricated Aluminum metal matrix composite (A356/SiC/10p) during continuous turning of composite rods using medium grade Polycrystalline Diamond (PCD 1500) inserts. Metal Matrix Composites (MMC’s) are very difficult to machine and PCD tools are considered by far, the best choice for the machining of these materials. Experiments were conducted at LMW-CNC-LAL-2 production lathe using PCD 1500 grade insert at various cutting conditions and parameters such as surface roughness and specific powers consumed were measured. The present results reaffirm the suitability of PCD for machining MMCs. Though BUE formation was observed at low cutting speeds, at high cutting speeds very good surface finish and low specific power consumption could be achieved. An Artificial Neural Network (ANN) model has been developed for prediction of machinability parameters of MMC using feed forward back propagation algorithm. The various stages in the development of ANN models VIZ. selection of network type, input and output of the network, arriving at a suitable network configuration, training of the network, validation of the resulting network has been taken up. A 2-9-9-2 feed forward neural network has been successfully trained and validated to act as a model for predicting the machining parameters of Al-SiC (10p) -MMC. The ANN models after successful training are able to predict the surface quality; and specific power consumption for a given set of input values of cutting speed and machining time.

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Muthukrishnan, N. "Machinability Studies and Artificial Neural Network Modeling of Turning Al-SiC (10p) Metal Matrix Composites". W ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66145.

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The paper presents the results of an experimental investigation on the machinability of fabricated Aluminum metal matrix composite (A356/SiC/10p) during continuous turning of composite rods using medium grade Polycrystalline Diamond (PCD 1500) inserts. MMC’s are very difficult to machine and PCD tools are considered by far, the best choice for the machining of these materials. Experiments were conducted at LMW-CNC-LAL-2 production lathe using PCD 1500 grade insert at various cutting conditions and parameters such as surface roughness, specific power consumed, and tool wear were measured. Machining was continued till the flank wears land on the tool crossed 0.4 mm. The influences of cutting speed on the insert wear and built-up edges (BUEs) formation were studied. The present results reaffirm the suitability of PCD for machining MMCs. Though BUE formation was observed at low cutting speeds, at high cutting speeds very good surface finish and low specific power consumption could be achieved. An Artificial Neural Network (ANN) model has been developed for prediction of machinability parameters of MMC using feed forward back propagation algorithm. The various stages in the development of ANN models VIZ. selection of network type, input and output of the network, arriving at a suitable network configuration, training of the network, validation of the resulting network has been taken up. A 2-9-3 feed forward neural network has been successfully trained and validated to act as a model for predicting the machining parameters of Al-SiC (10p) -MMC. The ANN models after successful training are able to predict the surface quality; specific power consumption and tool wear for a given set of input values of cutting speed and machining time.

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Bains, Preetkanwal Singh, H. S. Payal i Sarabjeet Singh Sidhu. "Analysis of Coefficient of Thermal Expansion and Thermal Conductivity of Bi-Modal SiC/A356 Composites Fabricated via Powder Metallurgy Route". W ASME 2017 Heat Transfer Summer Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/ht2017-5122.

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The present study investigates the thermal conductivity and coefficient of thermal expansion of bimodal SiCp reinforced Aluminum matrix composites formed via powder metallurgy method. The after-effects of proportion of particulate reinforcement as size distribution and sintering parameters on the thermal properties have been explored. The Box-Behnken design for response surface methodology was adopted to recognize the significance of chosen variables on the thermal conductivity and coefficient of thermal expansion of the composite. It is witnessed that the thermal conductivity and coefficient of thermal expansion enhanced due to increase in fine SiC particulates volume fraction. It has been exhibited that the fine SiC particulates (37μm) doped Al-matrix occupied interstitial positions and developed continuous SiC-matrix network. SEMs were conducted to evaluate the microstructure architecture for MMCs.

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Yandouzi, M., P. Richer i B. Jodoin. "MMCs Coatings with High SiC Volume Fraction Retention by Pulsed-Gas Dynamic Spraying". W ITSC2009, redaktorzy B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima i G. Montavon. ASM International, 2009. http://dx.doi.org/10.31399/asm.cp.itsc2009p1128.

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Abstract Aluminum-based composite coatings reinforced with different volume fractions of SiC particles were deposited on aluminum substrates by means of pulsed gas dynamic spraying using a mechanically mixed composite feedstock powder. Microstructural features of the coatings are examined and their hardness is reported. The results show that the high fraction of SiC particles in the feedstock powder are retained in the coatings and that increasing SiC content in the aluminum matrix significantly improves coating hardness. The highest hardness value was obtained for a coating with 28 vol% SiC. Beyond that, coating hardness decreased, which is attributed to increasing porosity and decreasing cohesion between deposited aluminum-based particles.

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Liu, Jian, Juan Li, Yingfeng Ji i Chengying Xu. "Investigation on the Effect of SiC Nanoparticles on Cutting Forces for Micro-Milling Magnesium Matrix Composites". W ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50170.

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Magnesium Metal Matrix Composites (Mg-MMCs) with nano-sized reinforcements exhibit better mechanical properties comparing to pure Magnesium (Mg) and its alloys. However, it is challenging to improve the machinability of this kind of composites. An analytical cutting force model for the micro-milling process was developed and validated to analyze the micro-machinability of the SiC nanoparticles reinforced Mg-MMCs. This model is different from the previous ones because it encompasses the behaviors of the reinforcement nanoparticles in the three cutting regimes, i.e., shearing, ploughing and elastic recovery. The volume fraction of particles and particle size are considered as two significant factors affecting the cutting forces in this model. The effects of the reinforcement nanoparticles on cutting forces were studied through modeling and experimental validation. The simulated cutting forces show a good agreement with the experimental data. Moreover, it is indicated that the amplitude and profile of cutting forces vary with the reinforcement particle’s volume fraction. This mainly arises from the strengthening effect of SiC nanoparticles.

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Li, Juan, Jian Liu i Chengying Xu. "Machinability Study of SiC Nano-Particles Reinforced Magnesium Nanocomposites During Micro-Milling Processes". W ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34294.

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This paper experimentally investigates the machinability of Magnesium Metal Matrix Composites (Mg-MMCs) with high volume fractions of SiC nano-particles. Samples of Mg-MMCs with 5 Vol.%, 10 Vol.% and 15 Vol.% reinforcements of SiC nano-particles were studied and compared with pure Magnesium. Different feedrates and spindle speeds were chosen as varied cutting parameters. Cutting forces, surface morphology and roughness were measured to understand the machinability of the four different materials during the micro-milling process. Based on the experimental results, it is observed that the cutting force increases with the increase of the spindle speed, the feedrate and/or the volume fraction. A drastic increasing rate is observed when the nano-particles’ volume fraction is increased from 5 to 10 Vol.%. The effect of the volume fraction is also studied in frequency domain, combined with the effect of the spindle speed and feedrate. More detailed theoretical analysis will be further studied to better understand the effect of the volume fraction on the machined surface quality and machining productivity.

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Khalifa, Tarek A., Tamer S. Mahmoud i Alexander M. Korsunsky. "Tensile and Creep Behavior of Extruded AA6063∕SiC[sub p] Al MMCs". W CURRENT THEMES IN ENGINEERING SCIENCE 2009: Selected Presentations at the World Congress on Engineering-2009. AIP, 2010. http://dx.doi.org/10.1063/1.3366502.

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