Effect of Loads on the Wear Properties of La₂O₃-MoSi₂ Composite against SiC at Elevated Temperature

Abstract:

Wear behaviours of La₂O₃-MoSi₂ composite against SiC under different loads at 1000°C and 0.126m/s sliding speed in air were investigated by using an XP-5 type high temperature friction and wear tester. The worn surfaces and phase of the sample were observed by scanning election microscopy (SEM) and X-ray diffraction (XRD), respectively. Results showed that friction coefficient and wear rate of La₂O₃-MoSi₂ composite and SiC decreased with the increase of loads. The wear mechanisms of La₂O₃-MoSi₂ composite are oxidation, adhesion abrasion and fatigue pitting.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 2138-2141
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.2138
• Online since: December 2011
• Authors: Si Yong Gu, Hou An Zhang, Chun Shi
• Keywords: MoSi₂, Rare Earth (RE), Silicon Carbide (SiC), Wear Mechanism at Elevated Temperature

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