期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 23, 期 4, 页码 1374-1385出版社
SPRINGER
DOI: 10.1007/s11665-014-0892-0
关键词
electron microscopy; mechanical testing; metal matrix composites; powder metallurgy; tribology
资金
- Nature Science Foundation of Hubei Province [2012FFB05104]
- National Natural Science Foundation of China [51275370]
- Fundamental Research Funds for the Central Universities [2010-II-020]
- Project for Science and Technology Plan of Wuhan City [2013010501010139]
- Academic Leader Program of Wuhan City [201150530146]
- Project for Teaching and Research project of Wuhan University of Technology [2012016]
The self-lubricating composites of Ni3Al-Ti3SiC2-TiC-C (NMC) with varying Ti3SiC2 contents were fabricated by spark plasma sintering technique. Dry sliding pin-on-disc friction and wear tests of NMC against Si3N4 ceramic ball were undertaken at 25, 200, 400, 600, and 800 A degrees C in air, respectively. The results showed that NMC with 15 wt.% Ti3SiC2 lubricant owned the excellent tribological properties over a wide temperature range from 25 to 800 A degrees C, whose friction coefficients and wear rates were about 0.17-0.58 and 0.31-4.2 x 10(-5) mm(3)/N/m, respectively. A possible explanation for these results was that the subsurface microstructure self-refinement and the special stratification morphology of the tribo-layer were beneficial to the reduction of friction coefficient. Meanwhile, the protective action of the tribo-layer for the frictional surface could also decrease the wear rate.
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