铝硅酸盐微晶玻璃摩擦磨损性能研究

在MRH-5A型环-块摩擦磨损试验机上考察了不同载荷下耐磨微晶玻璃与45#钢对摩时的摩擦磨损性能，用扫描电子显微镜和定点探针观察和分析磨损表面形貌和成分，并探讨了材料的磨损机理。结果表明：磨损率随着载荷的增加出现波动，当载荷低于40N时，磨损率随载荷增加而明显增大；而当载荷超过40N时，磨损率随载荷增加而明显降低；在较低载荷下，耐磨微晶玻璃的磨损失效主要源于轻微点蚀和疲劳剥落；在较高载荷下，其磨损失效主要源于表层晶粒塑性变形及疲劳脆性断裂。

Friction and Wear Behavior of Aluminous Silicate Glass-Ceramics

The friction and wear properties of wear-resistant aluminous silicate glass-ceramics sliding against AISI-1045 steel at various loads and sliding velocities were evaluated on an MRH-5A ring-on-block friction and wear tester. The morphologies of the worn surfaces of the glass-ceramics were observed on a scanning electron microscope, while the elemental distributions on the worn surfaces were determined by means of electron microprobe analysis. As the results, the friction and wear behaviors of the glass-ceramics were greatly dependent on the applied load and sliding velocity. Namely, the wear rate of the glass-ceramics increased with increasing load up to 40 N, then it decreased significantly with further increase of the load and reached the minimum at 60 N. The glass-ceramics sliding against the steel at a relatively smaller load were characterized by mild pitting and fatigue spalling, while they were dominated by superficial plastic deformation and fatigue-induced brittle fracture at a larger normal load.