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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Cu--70%Sn包晶合金高温度梯度定向凝固的组织及其尺度
, PP. 411-416
Keywords: 定向凝固,Cu--70%Sn包晶合金,枝晶间距
Abstract:
在凝固速率1－500？m/s的范围内,Cu--70%Sn包晶合金定向凝固组织由？相、包晶？相和共晶体组成,？相为领先相与最高界面生长温度假设的分析一致。理论计算结果显示,当凝固速率大于22.35mm/s时,？相可直接从液相中析出,无需通过包晶反应进行。凝固速率越低,？向？相固相转变系数越大,造成？相尺寸在1－5？m/s范围内变化很小,而包晶？相的体积分数随凝固速率的增加呈现先减后增的变化趋势。
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