摘要
将羟基硅酸铝类陶瓷润滑油添加剂长时间（26万公里）作用后的实际发动机缸套解体，通过原子力显微镜、纳米压痕仪、扫描电子显微镜、扫描俄歇微探针以及显微共焦拉曼光谱仪等对其摩擦表面进行分析，探讨了该添加剂的作用机理．结果表明：该陶瓷添加剂表现出明显的磨损自修复功能，可以很好地覆盖和修补缸套表面原有的裂纹，显著降低缸套表面的粗糙度，改善缸套的润滑性能；摩擦表面生成由富C层和过渡层组成、厚度250—450nm左右且分布不均匀的修复改性层，初步推测其中富C层为类金刚石结构；该陶瓷添加剂本身并不参与修复改性层的构建，但能够发挥关键而复杂的催化作用。
A cermet additive in lubricating oil with main composition was Al4 [ Si4O10] （OH）8, as added into all the twelve practical Cr-plated cylinder liners of the locomotive DF7D0062. After a long time （260 000 km） running, the anti-wear and self-repairing effects of the additive were studied by comparing the inner diameter variation of different parts of the cylinder liners before and after the test. The cermet additive exhibited obvious anti-wear and self-repairing function, and it well covered the micro-cracks on the surface, obviously reduced the roughness, and greatly improved the lubricating property. A 250 -450 nm repaired layer with a carbon-rich layer and a transition layer was unevenly distributed on the frictional surface. The carbon-rich layer was supposed as in DLC structure. The additive played a key role in the running process by the complex catalytic action instead of being part of the repaired layer.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2006年第6期574-579,共6页
Tribology
