华西口腔医学杂志Issue(3)：238-241,4.DOI:10.7518/hxkq.2014.03.007
不同热处理对牙科铸造银钯合金腐蚀行为的影响
Influence of cryogenic treatment and age-hardening heat treatment on the corrosion behavior of a dental casting Ag-Pd alloy
摘要
Abstract
Objective The purpose of this study is to investigate the influence of cryogenic treatment and age-hardening heat treatment on the corrosion behavior of a dental casting Ag-Pd alloy. Methods A low gold content dental casting alloy composed of Ag-Pd-Cu-Au was prepared for this study. Corrosion test was performed according to ISO 10271:2001 dental metalliecorrosion test methods. Experimental specimens were casted according to a standard dental lost-wax casting procedure, treated with solution by heating the specimens to 900 ℃, and immediately quenched in ice water. The specimens were then divided into four groups and subjected to heat treatment, cryogenic treatment, and heat treatment combined with cryogenic treatment. The specimens after the solution treatment were taken as control. The metallographic structures of the specimens were observed. The electrochemical parameters and the quantity of non-precious metallic ions released were evaluated via electrochemical and static immersion tests. Results Metallographic observation revealed that all the treatments resulted in a change in the microstructure of the alloy. The treatments were effective in improving the electrochemical parameters, such as an increase in Eocp and Ecorr and a decrease in Icorr (P<0.05). The amount of non-noble metal ions released showed no difference compared with the control group (P>0.05). Conclusion After different treatments, the antierosion properties of the alloy satisfied the ISO requirements. Age-hardening heat treatment and cryogenic treatment improved the corrosion resistance of the alloy.关键词
牙科银钯铸造合金/热处理/深冷处理/金相结构/腐蚀行为Key words
dental casting Ag-Pd alloy/heat treatment/cryogenic treatment/metallography/corrosion behavior分类
医药卫生引用本文复制引用
赵耀,武斌,孟玉坤..不同热处理对牙科铸造银钯合金腐蚀行为的影响[J].华西口腔医学杂志,2014,(3):238-241,4.基金项目
四川省科技支撑计划基金资助项目（2010fz0086）；深圳市科技计划基金资助项目 （）
