摘要
Ag-SnO_2是中等负荷开关电器用触头材料,合金内氧化是其制备的主要方法之一。在Ag-SnO_2的制备中,合金粉未完全内氧化是一个难点,添加金属元素促进合金内氧化的研究一直在进行。本文将稀土元素RE(La、Ce、Y)与Ag、Sn合金化,经雾化得到AgSnRE合金粉,在大气中内氧化后经成型-烧结得到合金坯锭;采用XRD、TGA-DAT等分析合金内氧化过程,并测试了Ag-SnO2-RE2O3的物理力学性能。研究表明,添加RE使AgSn内氧化的起始和结束温度最大下降分别为60℃和30℃,合金组织细化,硬度增加,然而导电率稍有降低。该项研究为AgSn合金粉末内氧化提供了新方法。
Ag-SnO2 is a kind of important contact materials for medium duty application, the internal oxidation of the alloy is one of main methods to produce it. In the production of Ag-SnO2, the complete internal oxidation of alloy powders is a hard point, research on the addition of metal elements to promote internal oxidation has been performed. In the present paper, the rare earth elements RE(La,Ce,Y) were alloyed with Ag and Sn, the AgSnRE alloy powders were produced by atomization, the internal oxidation was carried out at atmosphere; XRD,TGA-DAT were used to analyze the internal oxidation process, the properties of Ag-SnO2-RE2O3 were tested. The research result showed that compared with Ag-SnO2 without RE addition, the max. decreases in starting and finishing temperature for internal oxidation of AgSnRE alloy were 60℃ and 30℃, respectively; the grain size of AgSnRE was refined; the hardness was increased, but the conductivity was decreased. This study provides a new method for the internal oxidation of AgSn alloy powders.
出处
《贵金属》
CAS
CSCD
2005年第1期17-20,共4页
Precious Metals
基金
中国科技部科研院所专项基金资助项目(2003EG115031)
