摘要
通过Ce的添加以及熔体结构转变两个方面探究其对Sn-3.8Ag-0.7Cu的影响。运用直流四电极法测量Sn-3.8Ag-0.7Cu-XCe(X=0%,0.2%,0.5%,1%)合金在液相线以上电阻率随温度的变化,得出无铅焊料Sn-3.8Ag-0.7CuXCe合金存在温度诱导的熔体结构转变,并且这种转变是可逆的。随着Ce添加量的增加,合金的熔点升高。凝固实验结果显示,熔体结构转变以及稀土元素Ce的添加均可以细化合金微观组织,且当Ce的添加量为0.2%时,微观结构最细小均匀。
The paper explored the effect of Ce addition and liquid-liquid structure transition on Sn-3. SAg-0.7Cu. It compared temperature dependence of Sn-3.8Ag-O. 7Cu-XCe（X =0%, 0.2%, 0.5%, ]%） alloy resistivity above liquidus line using DC four electrode method, it obtained temperature-induced liquid-liquid structure reversible transition in Sn-3. 8Ag-O. 7Cu-XCe alloys. The melting point of alloy increased with the increase of Ce addition. Solidification experiment showed that microstructure of the alloy was refined by Ce addition and liquid-liquid structure transition; extremely fine and uniform microstructure was produced with 0.2% Ce addition.
出处
《有色金属加工》
CAS
2015年第1期13-19,共7页
Nonferrous Metals Processing
关键词
Sn-Ag-Cu-Ce合金
熔体结构转变
电阻率
凝固
Sn-Ag-Cu-Ce alloys
liquid-liquid structure transition
electrical resistivity
solidification
