期刊
TRIBOLOGY INTERNATIONAL
卷 122, 期 -, 页码 228-235出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2018.02.037
关键词
Al-graphite composite; Dry sliding; High temperature; Wear mechanism
资金
- National Natural Science Foundation of China [51675510, 51775532]
Tribological behavior of the Al-20SI-5Fe-2NI alloy and its composite containing 30 wt % copper-coated graphite were investigated at 25-500 degrees C. The result indicated that the composite showed a significantly decreased wear rate at all test temperatures as compared to the alloy. Owing to the combined effect of solid lubrication and dispersion strengthening provided by the graphite particles and in situ formed Al2Cu intemietallic, the composite can avoid severe adhesive wear up to 500 degrees C. At 25 degrees C, the predominant wear mechanism of the composite is abrasive wear, and it transforms to abrasive wear and delamination wear at elevated temperatures.
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