摘要
根据ISO6872牙科陶瓷标准制备KAVO氧化锆陶瓷-VitaVM9饰面瓷的双层瓷复合结构的三点弯曲强度样品,氧化锆与饰面瓷的厚度比为1:1,研究多次烧结对牙科氧化锆陶瓷-饰面瓷双层瓷结构的力学性能的影响,观察样品双层瓷结合界面,分析断裂模式。结果表明:随烧结次数的增加,弯曲强度未明显改变,强度约996～1020MPa。应力位移曲线显示氧化锆和饰面瓷同时发生碎裂。扫描电镜观察发现多次烧结后界面致密结合,无明显缺陷。
Bilayered three-point bending strength specimen of KAVO zirconia-Vita VM9 veneering porcelain were made according to ISO6872 standard, the core to porcelain thickness ratio was 1： 1. Specimen were subjected to multiple dentine porcelain firing cycles. Three-point bending strength were tested, SEM was used to observe the characteristics of the failure mode. Results show that no influence on the bending strength by multiple firing, the three-point bending strength were 996 - 1020 MPa after multiple firing, and no obvious defects was found at the interfaces. In all bilayered specimen, the bulk fracture initiated at the tensile surface of the core material and was consistently accompanied with porcelain crush and delamination at the interface.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2009年第B08期58-61,共4页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金项目(30700961)
关键词
牙科陶瓷
氧化锆
机械性能
多次烧结
dental ceramic
zirconia
mechanical properties
multiple firing
