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Preparation and properties of MoSi2 composites reinforced by TiC, TiCN, and TiB2

✍ Scribed by Junhu Meng; Jinjun Lu; Jingbo Wang; Shengrong Yang

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
798 KB
Volume
396
Category
Article
ISSN
0921-5093

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✦ Synopsis

Molybdenum disilicide (MoSi 2 )-based composites reinforced by TiC, TiCN, and TiB 2 were fabricated by hot-pressing. The microstructures, the mechanical properties at room temperature and the tribological properties of these materials were characterized. MoSi 2 -based composites reinforced by TiC, TiCN, and TiB 2 exhibited higher microhardness (HV) and bending strength than that of monolithic MoSi 2 . The wear behavior of monolithic MoSi 2 and its composites for sliding against Ni-Cr alloy at room temperature have been correlated with their mechanical properties. At 600 β€’ C, the tribo-oxidation together with the transfer of Ni-Cr alloy to the surface of MoSi 2 -based composites is found to be the predominating wear mechanisms. The morphology and chemistry of oxide layer have a role to play in the wear resistance of monolithic MoSi 2 and its composites.

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