Journal
MATERIALS & DESIGN
Volume 45, Issue -, Pages 179-189Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2012.08.060
Keywords
NiAl matrix; Ti3SiC2; Spark plasma sintering; In situ; Tribology
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Funding
- Fundamental Research Funds for the Central Universities [2010-II-020]
- National Natural Science Foundation of China [51275370]
- Project for Science and Technology Plan of Wuhan City
- Program for New Century Excellent Talents in University of Ministry of Education of China
- Nature Science Foundation of Hubei Province
- Academic Leader Program of Wuhan City [201150530146]
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NiAl matrix self-lubricating composites (NMCs) with various contents of Ti3SiC2 were fabricated by in situ technique using spark plasma sintering. The effects of Ti3SiC2 content on tribological properties of NMC were investigated. The results showed that NMC were composed of the matrix phase of NiAl alloy, enhanced phase of TiC and lubricating phases of Ti3SiC2 and C. NMC with 10 wt.% Ti3SiC2 exhibited low friction coefficient of 0.60 and wear rate of 5.45 x 10 (5) mm(3) (N m) (1) at the condition of 10 N-0.234 m/s at room temperature. The optimum content of Ti3SiC2 was 10 wt.%. The excellent tribological performance of NMC could be attributed to the balance between strength and lubricity, as well as synergetic effect of enhanced phase and lubricating phases. The wear mechanisms changed with the increasing of the doped content of Ti3SiC2. (C) 2012 Elsevier Ltd. All rights reserved.
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