ISSN   1004-0595

CN  62-1095/O4

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王雪松, 张珍珍, 李小成, 张少锋, 贺林. 齿科二硅酸锂玻璃陶瓷的滑动磨损行为[J]. 摩擦学学报, 2017, 37(2): 212-217. DOI: 10.16078/j.tribology.2017.02.010
引用本文: 王雪松, 张珍珍, 李小成, 张少锋, 贺林. 齿科二硅酸锂玻璃陶瓷的滑动磨损行为[J]. 摩擦学学报, 2017, 37(2): 212-217. DOI: 10.16078/j.tribology.2017.02.010
WANG Xuesong, ZHANG Zhenzhen, LI Xiaocheng, ZHANG Shaofeng, HE Lin. Sliding Wear Behavior of a Lithium Disilicate Glass-ceramic for Dentistry[J]. TRIBOLOGY, 2017, 37(2): 212-217. DOI: 10.16078/j.tribology.2017.02.010
Citation: WANG Xuesong, ZHANG Zhenzhen, LI Xiaocheng, ZHANG Shaofeng, HE Lin. Sliding Wear Behavior of a Lithium Disilicate Glass-ceramic for Dentistry[J]. TRIBOLOGY, 2017, 37(2): 212-217. DOI: 10.16078/j.tribology.2017.02.010

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

  • 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.

     

    Abstract: 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.

     

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