非平衡凝固时包晶反应滞后现象的研究  

Delayed Phenomenon of Peritectic Reaction Under Non-equilibrium Cooling

作　　者：孙建俊[1,2] 田学雷[1] 夏继梅[2] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室 [2]山东劳动职业技术学院

出　　处：《特种铸造及有色合金》2009年第8期754-756,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50271037;50395101)

摘　　要：利用差示量热扫描分析仪(DSC)测量了Al-Ni系、Sn-Sb系二元合金的包晶反应温度。同样的凝固速度时,Al-Ni合金包晶反应严重滞后,Sn-Sb合金包晶反应则滞后较小。研究表明,先析出相和包晶相晶格结构的异同是造成包晶反应严重滞后的原因,两者结构不同时,包晶反应严重滞后;两者结构相同时,包晶反应滞后较小。Peritectic reaction temperatures of Al-Ni alloys and Sn-Sb alloys were measured by DSC. With a given cooling rate,peritectic reaction temperature of Al-Ni alloys is serious delayed,while that of Sn-Sb alloys is nearly equal with equilibrium reaction temperatures,which is closely related to the structural difference of primary phase and peritectic phase. With different structure between primary phase and peritectic phase,peritectic reaction is seriously delayed,while with the same structure,the reactive temperature is identical with equilibrium temperature.

关 键 词：DSC AL-NI合金 SN-SB合金 包晶反应 晶体结构 

分 类 号：TG111.4[金属学及工艺—物理冶金]