微米级镍-银双金属粉镀层结构及其抗氧化性  

Coating Structure and Antioxygenation of Micron Ni-Ag Bimetallic Powder

作　　者：李树栋[1] 袁颖[1] 赵康[1] 

机构地区：[1]西安理工大学,陕西西安710048

出　　处：《稀有金属材料与工程》2006年第5期817-819,共3页Rare Metal Materials and Engineering

基　　金：陕西省自然科学基金(2000C32);教育厅产业化培育项目(02JC35)资助

摘　　要：采用化学镀法在镍粉表面包覆一层金属银,然后将这种包覆粉进行真空热处理,即可制得具有抗氧化作用的微米级镍-银双金属粉末。用SEM、XRD、粒度分析和热重分析表征不同包覆厚度的双金属粉和原始镍粉的表面形貌、包覆结构及其抗氧化性。结果表明:镍粉表面包覆的银越多,双金属粉形状越规则,表面包覆层越致密,双金属粉的抗氧化温度也就越高,颗粒表面银含量为76%(质量分数,下同)时,其抗氧化温度可以达到850℃。The micro Ni-Ag bimetallic powder with high temperature antioxygenic property was prepared by an electroless deposition technique. The surface morphology, microstructure and oxidation resistance were characterized by SEM, XRD, TG and other methods for the coated powder. It is found that the more the content of silver, the better the oxidation resistance of Ni-Ag bimetallic powder, and the oxidation resistance temperature is 850℃ when the content of silver in Ni-Ag bimetallic powder is 76%.

关 键 词：镍-银双金属粉 表面结构 抗氧化性 

分 类 号：TQ153[化学工程—电化学工业]