牙科修复陶瓷材料微小缺陷的损伤演变  

Investigation of Micro-defects in Dental Ceramics and Damage Evolution

作　　者：邱岩[1] 包亦望[1] 王秀芳[1] 刘亦洪[2] 周华斌[3] 

机构地区：[1]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024 [2]北京大学口腔医学院,北京1000813 [3]上海理工大学医疗器械与食品学院,上海200093

出　　处：《稀有金属材料与工程》2011年第S1期193-195,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50872003;50772103);北京市自然科学基金项目(2082026;2102047);国家"973"计划(2009CB623103);"863"项目(2007AA03Z526)

摘　　要：利用球压痕和维氏压痕对牙科陶瓷样品表面分别进行载荷、接触面积、压痕裂纹尺寸的研究,了解表面缺陷对其的影响。采用球环弯曲试验对圆板样品进行弯曲强度的测试,分别比较了不同材料的球环强度值。利用四个基本材料力学性能参数对材料的损伤容限进行了分析。结果表明玻璃与陶瓷层合后的复合材料比单质材料具有更高的接触损伤容限和可靠性。Sphere and Vickers indentation were carried out to investigate the damage and strength of dental ceramics, the results indicates that different damage evolutions can be formed for the two indents. The indentation damage process was investigated by camera in situ during the indentation loading and unloading. the bending strength was measured by Ball-on-ring test method for three different specimens. The damage tolerance of the dental ceramics was evaluated by using four mechanical properties, i.e., Strength, hardness, toughness and elastic modulus. It is concluded that the damage tolerance and reliability of the laminated ceramics is better than monolithic ceramics.

关 键 词：损伤容限 牙科陶瓷 压痕 可靠性 

分 类 号：R783.1[医药卫生—口腔医学]