Journal
TRIBOLOGY LETTERS
Volume 43, Issue 1, Pages 55-63Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-011-9785-7
Keywords
Ni3Al matrix; BaMoO4; BaAl2O4; High temperature; Tribology
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Funding
- National Natural Science Foundation of China [51075383]
- Innovation Group Foundation from NSFC [50721062]
- National 973 Project [2007CB607601]
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The Ni3Al matrix composites with addition of 10, 15, and 20 wt% BaMoO4 were fabricated by powder metallurgy technique, and the tribological behaviors were studied from room temperature to 800 A degrees C. It was found that BaAl2O4 formed during the fabrication process. The Ni3Al composites showed poor tribological property below 400 A degrees C, with high friction coefficients (above 0.6) and wear rates (above 10(-4) mm(3)/Nm). However, the composites exhibited excellent self-lubricating and anti-wear properties at higher temperatures, and the composite with addition of 15 wt% BaMoO4 had the lowest wear rate (1.10 x 10(-5) mm(3)/Nm) and friction coefficient (0.26). In addition, the results also indicated that BaAl2O4 for the Ni3Al composites did not exhibit lubricating property from room temperature to 800 A degrees C.
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