通过高能球磨与粉末冶金制备出耐高温自润滑材料PM304.PM304的组成成分与PS304相同,但PM304组织致密,3种自润滑成分尺寸细小.研究发现,环境温度与组织结构对PM304的摩擦磨损性能有较大影响.室温时,PM304的磨损率很大,摩擦表面显示严重的微观脆性断裂;随着温度升高至200~600℃,由于BaF2/CaF2与Ag具有较高的热膨胀系数,在压力与摩擦力的作用下,溢出的BaF2/CaF2与Ag发生塑性变形并在摩擦表面形成光亮层,导致 PM304的磨损率减小.
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