Study on Appearance of Blebs of Au-Pt Dental Alloy after Porcelain Firing
Au-Pt alloy was widely used for metal-porcelain restorations. This research is focusing on the appearance of belbs and weakening of metal-porcelain bonding strength after the sintering of opaque porcelain because of the gold-platinum (Au86.1％-Pt11. 5％ (wt)) ceramic alloy itself. The micro structure and micro-area chemical composition of the alloy were analyzed by using SEM and EDS. The results show that the exist of AI2O3 impurity particulates in the alloy is the main reason of the appear ance of blebs and weakening of metal-porcelain bonding strength after porcelain firing. The reason is that the thermal expansion coefficient of AI2O3 impurity particulates in the crown is inconsistency with the porcelain powder. The Al2O3 impurity particulates mainly come from the cracked alumina crucible detritals during melting.
Au-Pt ceramic alloy Porcelain Bleb Metal-porcelain bonding strength Al2O3 impurity par ticulate
Zhang Hengjin Miao Weidong Feng Jingsu Yang Yuhui Hu Yuling Liu Kefu
GRIKIN Advanced Materials Co.,LTd,General Research Institute for Nonferrous Matals,Beijing 100088,China
国际会议
第三届国际贵金属会议(The Third International Conference on Precious Metals)
西安
英文
233-237
2008-06-01（万方平台首次上网日期，不代表论文的发表时间）