牙科低金含量银钯合金在相变温度下的强化机制研究  

Research on Hardening Mechanism of Dental Low-content Gold Ag-Pd Alloy under Phase Transformation Temperature

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]四川省医学科学院暨四川省人民医院口腔科,成都市610072 [2]四川大学华西口腔医学院修复科,成都市610041 [3]广西壮族自治区人民医院口腔科,南宁市530021

出　　处：《广西医学》2011年第12期1547-1550,共4页Guangxi Medical Journal

基　　金：广西科学研究与技术开发计划资助项目(0816004-11)

摘　　要：目的探讨牙科低金含量银钯合金在相变温度下的强化机制。方法经过固溶处理后,合金在400℃分别等温强化处理1 min、2 min、5 min、10 min、20 min、50 min和100 min,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合金的强化机制。结果强化处理100 min,合金硬度达到最大值,较固溶处理后的硬度提高了105%,处理较长时间后有片状分布的析出相,元素分析为Cu、Pd富集。结论合金在低于相变温度下的硬度升高与相变所致的内应变高度相关。Objective To study the hardening mechanism of dental low-content gold Ag-Pd alloy under phase transformation temperature. Methods The alloy was iso-thermally age-hardened at 400℃ for 1 minute,2 minutes,5 minutes,10 minutes,20 minutes, 50 minutes and 100 minutes respectively after solution, and followed by ice-water quench. By means of microhardness, X-ray diffraction, SEM and EPMA,the hardening mechanism was studied. Results The microhardness of the alloy after iso-thermally for 100 rain got the maximum hardness which rised 105% than that of the hardness by solution treated. There was new phase with abundant Cu, Pd. Conclusion The elevatin of hardness is related with inner strain causing 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：R783.6[医药卫生—口腔医学]