發(fā)布時間：2018-02-10 00:16

  本文關(guān)鍵詞： 稀土 無鉛焊料 顯微組織 熔化特性 潤濕性　出處：《廣西大學(xué)學(xué)報(自然科學(xué)版)》2017年02期 　論文類型：期刊論文

【摘要】：針對Sn-Al體系不易混熔的難點,通過粉末壓片與真空電弧熔煉相結(jié)合的方法,成功制備了添加稀土的Sn-Cu-Al無鉛焊料,并研究了添加微量單一稀土Ce、La和混合稀土RE對其顯微組織和可焊性(熔化特性、潤濕性)的影響。實驗結(jié)果表明,不同稀土的添加均能使Sn-0.7Cu-0.075Al合金的組織均勻細(xì)化,單一稀土Ce、La的添加對基體合金的細(xì)化效果優(yōu)于混合稀土RE的。單一稀土Ce、La的添加使基體合金的熔點從229.82℃分別降低到227.06℃和227.38℃,而混合稀土RE的添加對基體合金熔點影響不大,不同微量稀土的添加均略微降低了基體合金的熔程。不同微量稀土的添加均改善了基體合金的潤濕性能。其中,單一稀土Ce的改善作用最明顯,使基體合金鋪展率從68.61%提升至73.88%,潤濕角從34.6°下降到26.6°。
[Abstract]:Aiming at the difficulty of Sn-Al system being difficult to be mixed, Sn-Cu-Al lead-free solder with rare earth elements was successfully prepared by the method of powder pressing and vacuum arc melting. The effects of the addition of trace amount of rare earth cerium La and mixed rare earth RE on the microstructure and weldability (melting property, wettability) of Sn-0.7Cu-0.075Al alloy were studied. The experimental results show that the microstructure of Sn-0.7Cu-0.075Al alloy can be evenly refined by adding different rare earth elements. The addition of single rare earth cerium La has better refining effect than that of mixed rare earth RE alloy, and the melting point of the matrix alloy decreases from 229.82 鈩，

本文編號：1499203