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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Sn--3.8Ag--0.7Cu--1.0Er无铅钎料中Sn晶须变截面生长现象
, PP. 199-203
Keywords: 无铅钎料,稀土,Sn晶须,变截面
Abstract:
在Sn--3.8Ag--0.7Cu无铅钎料中添加质量分数为1%的稀土Er会在其内部形成尺寸较大的稀土相ErSn3.暴露于空气中ErSn3将发生氧化,同时在其表面会出现Sn晶须的快速生长现象.室温时效条件下,在氧化的ErSn3表面会生长出少量的杆状Sn晶须,Sn晶须的截面尺寸会发生连续变化;高温时效条件下,在氧化的ErSn3表面会生长出大量的针状Sn晶须,Sn晶须的截面尺寸会发生阶梯式变化.提出了ErSn3氧化过程中体积应变能是一个变量的模型,可以解释观察到的现象.
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