Appraisal of other silicides as structural materials

Shah, D. M.; Berczik, D.; Anton, Donald L.; Hecht, R. J.

doi:10.1016/0921-5093(92)90311-n

Cited by 222 publications

(96 citation statements)

References 3 publications

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“…Tal composto corresponde a uma classe de materiais denominada intermetálicos, a qual nas últimas décadas vem despertando grande interesse dado suas novas aplicações [22]. Além disso, o MoSi 2 é refratário com uma temperatura de fusão de 2030 °C [23,24].…”

Section: Tintas De Alta Emissividade Aplicadas Aos Veículos Espaciaisunclassified

Fundamentos e análise de tintas refratárias de alta emissividade

et al. 2015

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ResumoO presente trabalho buscou analisar patentes produzidas pela NASA e estudos correlatos na área de tintas refratárias de alta emissividade, segundo os princípios que regem as propriedades termo-ópticas dos materiais, as quais compreendem: absorção, refletividade, transmissão e emissão de radiação eletromagnética. Primeiramente, visou-se a compreensão destes fenômenos físicos e as leis que os governam. Posteriormente, buscou-se aplicá-los destacando e explicando a evolução observada na composição das tintas de alta emissividade utilizadas em veículos espaciais. Por fim, compreendeu-se que o índice de absorção dos materiais é decorrente do modo como estes interagem com a energia radiante incidente. Além disso, constatou-se que a emissividade dos materiais utilizados está associada principalmente ao balanço entre o índice de absorção e a refletividade. Tal estudo e acompanhamento do desenvolvimento tecnológico das tintas refratárias de alta emissividade permitem uma compreensão mais profunda sobre o seu mecanismo de atuação e potencial uso em outros sistemas, como por exemplo nos fornos industriais revestidos com material refratário que operam a altas temperaturas. Palavras-chave: tintas refratárias, emissividade. Abstract The objective of the present paper is to analyze the patents produced by NASA and other related studies in the area of high emissivity refractory coatings, according to the fundamentals that rule the thermo-optical materials properties, which include

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Section: Tintas De Alta Emissividade Aplicadas Aos Veículos Espaciaisunclassified

Fundamentos e análise de tintas refratárias de alta emissividade

et al. 2015

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“…This can be further divided into β phase layer and α″/α′ phase layer from outside to inside depending on the Mo concentration in the diffusion layer, as described in our previous paper [15]. Furthermore, it is evident that the addition of Al leads to a marked increase in the width of the Mo diffusion layer, presumably due to that the Al addition imparts more metallic character to the bonds in the silicides, decreasing the diffusional resistance of Mo inward into the substrate [29]. The graded distribution of alloying elements in the transition layer is beneficial for improving the interfacial bonding strength between the coatings and the Ti substrates by lowering stress concentrations at the interface when the coatings are subjected to external stress.…”

Section: Microstructure and Phase Analysismentioning

confidence: 99%

Effect of Al addition upon mechanical robustness and corrosion resistance of Mo5Si3/MoSi2 gradient nanocomposite coatings

Liu

et al. 2013

Surface and Coatings Technology

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A graded Al alloyed MoSi 2 /Mo 5 Si 3 nanocomposite coating was prepared on a commercially pure titanium substrate by double cathode glow discharge. The adhesion strength of the resultant coatings to substrate was enhanced by the graded design and the formation of a wider transitional layer between the coating and substrate. Moreover, corrosion resistance of the coatings increased through the addition of Al. First-principle calculations revealed that Al additions raised the corrosion potential of both MoSi 2 and Mo 5 Si 3 , and at the same time reduced the corrosion potential disparity between these two phases, thereby alleviating the occurrence of preferential corrosion.

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“…Titanium disilicide, TiSi 2 , has found wide applications as thin film in microelectronics [10][11][12] . In Ti-Si system, five silicide compounds: Ti 3 14 . The Mo−Si−Ti system can form a ternary compound like (Mo,Ti)Si 2 11 .…”

Section: ·Kmentioning

confidence: 99%

Formation of Mo−Si−Ti Alloys by Self−propagating Combustion Synthesis

Zhu

Feng

et al. 2015

Mat. Res.

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0.6 )Si 2 were prepared by combustion synthesis. The combustion mode, propagation velocity of combustion wave, combustion temperature and product structure were investigated. Specimens MoSi 2 , (Mo 0.9 Ti 0.1 )Si 2 , (Mo 0.8 Ti 0.2 )Si 2 , (Mo 0.7 Ti 0.3 )Si 2 , underwent spontaneously self−propagating combustion synthesis. However, the (Mo 0.6 Ti 0.4 )Si 2 and (Mo 0.5 Ti 0.5 )Si 2 specimens required a sustainable energy supply to complete the combustion synthesis reaction. There was no combustion synthesis reaction in specimen (Mo 0.4 Ti 0.6 )Si 2 . The combustion wave propagated along a spiral trajectory from top to the bottom of the specimen compacts in a layer by layer mode. The propagation velocity of the combustion wave reduced with the addition of titanium. The X-ray diffraction analysis showed that the Cll b -MoSi 2 and C40-(Mo,Ti)Si 2 type phases were formed during combustion synthesis. The intensity of diffraction peaks of C40-(Mo,Ti)Si 2 phase increased with Ti content.

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Appraisal of other silicides as structural materials

Cited by 222 publications

References 3 publications

Fundamentos e análise de tintas refratárias de alta emissividade

Fundamentos e análise de tintas refratárias de alta emissividade

Effect of Al addition upon mechanical robustness and corrosion resistance of Mo5Si3/MoSi2 gradient nanocomposite coatings

Formation of Mo−Si−Ti Alloys by Self−propagating Combustion Synthesis

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