采用粉末冶金工艺制备一种Ni-Co-A1系高温合金,研究了该合金的室温力学性能和高温(800℃)摩擦学性能与热压温度的关系.结果表明:合金的密度、硬度、抗压强度随着热压温度的提高而提高,但是热压温度高于1200℃后提高不大;随着热压温度的提高合金的高温摩擦学性能有所改善,磨痕表面形成了保护性的氧化物“釉质层”,“釉质层”与基体的结合强度影响了合金的高温摩擦性能,而结合强度又可能与热压烧结试样的致密度有关.磨痕表面犁沟的深浅与热压温度有很大关系.
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