Sialon陶瓷的冲蚀磨损及磨粒磨损行为

以ＳｉＣ作为磨粒较全面地研究了Ｓｉａｌｏｎ陶瓷的磨损性能：冲蚀磨损和磨粒磨损性能．Ｓｉａｌｏｎ陶瓷在冲蚀磨损实验中表现出了脆性冲蚀的特征，在高角冲蚀下，冲蚀磨损率随着冲蚀角度的增大而迅速增加，并在冲蚀角为９０°附近达到最大．ＳＥＭ分析表明Ｓｉａｌｏｎ陶瓷的冲蚀磨损机理主要是显微切削和表面颗粒拔出脱落．在Ｓｉａｌｏｎ陶瓷的磨粒磨损实验中，较高载荷作用下，磨损量与时间之间有指数变化关系；较低载荷作用下，磨损初期有一个短暂的磨损量基本不变的孕育阶段，随后进入快磨损阶段，本文对该孕育现象进行了探讨．对磨损表面的ＳＥＭ分析发现；Ｓｉａｌｏｎ陶瓷的磨粒磨损机理主要是犁耕和表面断裂脱落．

Erosion and Abrasion Behavior of Sialon Ceramic

The erosion and abrasion of Sialon ceramic was studied using silicon carbide particles as wear media. The erosion of Sialon represents the character of brittle erosion: under the high angle erosion, the erosion wear rate increases rapidly with the increase of the erosion angle, being maximized at 90. The analysis of SEM indicates that the erosion mechanisms of Sialon ceramic mainly are microcutting and surface grain spalling. In the abrasive wear of 奡ialon ceramic, under a higher load, there is an exponential relation between wear loss and wear time; under a lower load, at the beginning of wear there is an incubation during which wear loss is keeping at low level, then wear loss will increase after incubation. The incubation was discussed. By SEM analysis, the dominating wear mechanisms are plough and surface fracture shedding.