齿科二硅酸锂玻璃陶瓷的滑动磨损行为  

Sliding Wear Behavior of a Lithium Disilicate Glass-ceramic for Dentistry

作　　者：王雪松[1] 张珍珍[1] 李小成[2] 张少锋[1] 贺林[2] 

机构地区：[1]第四军医大学军事口腔医学国家重点实验室口腔疾病国家临床医学研究中心,陕西西安710032 [2]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《摩擦学学报》2017年第2期212-217,共6页Tribology

基　　金：国家自然科学基金项目(81371176和81671018)资助~~

摘　　要：在人工唾液润滑条件下,利用销—盘磨损试验机研究了齿科二硅酸锂玻璃陶瓷的滑动磨损行为.结果表明:二硅酸锂玻璃陶瓷的磨损过程呈现显著的跑合磨损期,且跑合期的磨损率远大于稳定磨损期的磨损率;减小原始表面粗糙度可缩短跑合期,降低跑合期的磨损率.在二硅酸锂玻璃陶瓷的显微组织中,虽然二硅酸锂晶体相比玻璃基体具有更高的硬度,但在跑合磨损期却更容易发生剥落磨损,造成跑合期磨损表面粗糙度的显著变化,这种现象可能与二硅酸锂晶体具有较低的弹性断裂应变能力(H/E比值)有关.Sliding wear behavior of a lithium disilicate glass-ceramic for dentistry was investigated using a pin-on-disk wear tester under the lubricating condition with artificial saliva. It is found that severe running-in wear exhibited because, the wear rate in the running-in region was much higher than that in the steady wear region. Decreasing the initial surface roughness of the wear surface shortened the running-in period and reduced the corresponding wear rate. Although the lithium disilicate crystalline phase in the microstructure of the glass-ceramic has higher hardness than the glass matrix, the crystalline phase was prone to spall predominantly in the running-in process, resulting in remarkable change of the worn surface roughness. The phenomenon was correlated with the lower elastic strain to failure （H/E ratio） of lithium disilicate crystalline phase.

关 键 词：玻璃陶瓷 二硅酸锂 滑动磨损 跑合 稳定磨损 

分 类 号：TH117.1[机械工程—机械设计及理论]