相变对牙科低金含量银钯合金强度的影响  

Effect of phase-transformation on the hardness of dental low-content gold Ag-Pd alloy

作　　者：田保[1] 杨征[2] 孟玉坤[2] 潘小波[3] 彭利辉[3] 钟爱喜[3] 刘光雪[3] 李荣婷[3] 

机构地区：[1]四川省医学科学院.四川省人民医院口腔科,四川成都610072 [2]四川大学华西口腔医院修复科,四川成都610041 [3]广西壮族自治区人民医院口腔科,广西南宁530021

出　　处：《四川医学》2013年第2期149-151,共3页Sichuan Medical Journal

基　　金：广西自治区科技攻关项目(编号:桂科攻0816004-11);四川省卫生厅科研项目(编号:070076)

摘　　要：目的探讨相变对牙科低金含量银钯合金强度的影响。方法经过固溶处理后,合金在600℃分别等温强化处理1min,2min,5min,10min,20min和50min,淬火冷却。采用显微硬度测试,X线衍射,扫描电镜和电子探针了解相变对合金强度的影响。结果提高处理温度后,合金强化速度显著提升,2min时即达到最大硬度,有片状析出相析出,呈簇状分布,原子百分比近似Cu7PdAu2。结论合金硬度提高与相变无关,与相变所致的内应变有关。Objective Discuss the effect of phase-transformation on the hardness of dental low-content gold Ag-Pd alloy.Methods After solution treated,the alloy was iso-thermally age-hardened at 600℃ for 1min,2min,5min,10min,20min and 50min,respectively,followed by ice-water quench.By means of micro-Vicker＇s hardness,X-ray diffraction,SEM and EPMA,the effect of phase-transformation was studied.Results At higher temperature,the hardness rised the maximum with higher speed after iso-thermally age-hardened for 2min.lamellar precipitation with areata distribution was observed.Conclusion The elevation of hardness was related not with phase-transformation,but with inner strain caused by phase-transformation.

关 键 词：银钯合金 牙科合金 时效强化 显微硬度 

分 类 号：R783.1[医药卫生—口腔医学]