反复熔铸对牙科烤瓷合金显微结构的影响  

The effect of recasting on microstructure of dental ceramic alloys

作　　者：王颖卉[1] 邱芬芳 潘宇 吴维青 程辉[1] WANG Ying-hui;QIU Fen-fang;PAN Yu;WU Wei-qing;CHENG Hui(Department of Prosthodontics, School and Hospital of Stomatology, Oral Medicine Research Institute, Oral Medical Aesthetics and Biomechanics Research Center, Fujian Medical University. Fuzhou 350002;Department of Stomatology, Fujian Provincial Governmental Hospital. Fuzhou 350002;Test Center, Fuzhou University. Fuzhou 350002, Fujian Province, China)

机构地区：[1]福建医科大学附属口腔医院修复科,福建医科大学口腔医学研究院,福建医科大学口腔医学美学与生物力学研究中心,福建福州350002 [2]福建省级机关医院口腔科,福建福州350002 [3]福州大学测试中心,福建福州350002

出　　处：《上海口腔医学》2018年第6期585-590,共6页Shanghai Journal of Stomatology

基　　金：福建医科大学附属口腔医院科技创新领军人才项(2015-KQYY-LJ-3).

摘　　要：目的:探讨反复熔铸对钴铬、纯钛、钯铜镓、金铂烤瓷合金显微结构的影响。方法:在真空加氩气保护环境下,将4种烤瓷合金单纯反复熔铸1～3次。每次再熔铸前,烤瓷合金均经过课题组前期研究所得"烤瓷合金再熔铸前最佳处理方法"处理,根据金属显微组织检验方法(GB/T13298-2015),分别对熔铸前、熔铸1～3次后的烤瓷合金进行研磨、抛光、浸蚀,采用金相显微镜或扫描电镜检测金相显微结构。结果:随着熔铸次数增加,钴铬烤瓷合金晶粒粗化、晶粒间基质和晶界间化合物增多。纯钛烤瓷合金随熔铸次数增加,晶粒粗化明显。2次熔铸后,晶粒有等轴化倾向,3次熔铸则出现针刺状β相。钯铜镓烤瓷合金在2、3次熔铸后,晶粒结构略有长大。金铂烤瓷合金晶粒结构未随熔铸次数发生明显改变。结论:反复熔铸显著改变钴铬、纯钛、钯铜镓烤瓷合金的显微结构,建议由厂家回收再利用烤瓷合金废旧料。PURPOSE:To investigate the effects of recasting on metallographic microstructure of cobalt-chromium(Co-Cr),commercially pure titanium(cpTi),palladium-copper-gallium(Pd-Cu-Ga),aurum-platinum(Au-Pt) ceramic alloys.METHODS:Without adding new alloys,Co-Cr,cpTi,Pd-Cu-Ga and Au-Pt ceramic alloys were recasted for 1-3 times under the circumstance of vacuum compressive casting with argon.Before each recasting,these 4 ceramic alloys casted previously were treated by the most appropriate way which has been reported by our previous study.According to GB/T13298-2015 standards,the specimens of 4 ceramic alloys after recasting 1-3 times were grinded,polished,and etched and then the metallographic microstructure of them were determined by a metallographic microscope or scanning electron microscopy(SEM).RESULTS:With the increase of recasting times,the microstructure of Co-Cr ceramic alloy showed grain growth,grain matrix increase,and the intermetallic compound in the grain boundary increase,the microstructure of the cpTi ceramic alloy showed grain growth.The samples of cpTi ceramic alloy recasting twice appeared shaft tendency,and the ones which were recasted 3 times were compound of α-phase and β-phase.The microstructure of the Pd-Cu-Ga ceramic alloy showed grain growth slightly after casting 2-3 times,while no significant change was found on the microstructure of the Au-Pt ceramic alloy.CONCLUSIONS:Recasting changes the microstructure of Co-Cr,cpTi,and Pd-Cu-Ga ceramic alloys,and the ceramic alloys may recycled by the manufacturers.

关 键 词：烤瓷合金 反复熔铸 显微结构 

分 类 号：R783.1[医药卫生—口腔医学]