Synthesis and properties of MoSi2 alloyed with aluminum

MoSi2 alloyed with aluminum element has been successfully synthesized by mechanical alloying through implementation of a subsequent heat-treating technique. Hardness and fracture toughness values of the hot-pressing disks at room temperature were measured and their responded microstructures were ana...

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Published inInternational journal of refractory metals & hard materials Vol. 21; no. 1-2; pp. 75 - 79
Main Authors Zhang, Houan, Long, Chunguang, Chen, Ping, Tang, Guoning, Liu, Xinyu
Format Journal Article
LanguageEnglish
Published 01.01.2003
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Summary:MoSi2 alloyed with aluminum element has been successfully synthesized by mechanical alloying through implementation of a subsequent heat-treating technique. Hardness and fracture toughness values of the hot-pressing disks at room temperature were measured and their responded microstructures were analyzed by using SEM and X-ray. No Al-Mo interphase and Al2O3 phase appear in mechanical alloying process of Mo-Si-Al system, meanwhile, the addition of Al is found to hold up the phase formation process of mechanical alloying. The appropriate content of Al addition in Mo-Si-Al system is 8.5 at.% and this composite has the highest hardness and toughness values, an improvement about of 34% and 64% more than that of pure MoSi2, respectively, which is attributed to Mo(Si,Al)2 particles strengthening and crack deflection and crack microbridging toughening mechanisms.
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ISSN:0263-4368
DOI:10.1016/S0263-4368(03)00003-9