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全致密氮化硅具有轴承材料所要求的全部优点,如高温强度好、重量轻、高硬度、低摩擦系数以及疲劳寿命长等。与其它陶瓷材料能够在轴承中压碎的情况不同,这种材料主要是疲劳剥落破坏,这是一种灾难性很少的破坏模式。热压Ti_3N_4具有高的断裂韧性和精细晶粒尺寸,是一种最有希望的滚动轴承元件和座圈用材料。其部件还具有非常好的表面光洁度。 S K F研究开发计划结果表明: (1)处于滚动接触的氮化硅与钢类似,也形成弹性流体薄膜。 (2)氮化硅与自身或者与钢的非润滑态附着摩擦
All-silicon nitride has the bearing material all the required advantages, such as high-temperature strength, light weight, high hardness, low friction coefficient and long fatigue life. Unlike other ceramic materials that can be crushed in bearings, the material is mainly fatigue-spalling, a disastrous mode of failure. Hot pressing Ti_3N_4 has high fracture toughness and fine grain size, is one of the most promising rolling bearing components and seat materials. Its components also have a very good surface finish. The results of the S K F research and development program show that: (1) Silicon nitride in rolling contact is similar to steel and also forms a flexible fluid film. (2) Non-lubricated adhesion friction between silicon nitride and itself or with steel