摘要
采用热力学计算技术,研究了凝固过程中Al-Zn稀溶液合金的固/液界面形态线性稳定性及非线性稳定性,讨论了热力学计算技术和采用线性化二元参数在固/液界面线性稳定性和非线性稳定性判断上的差别,分析了固/液界面失稳后的界面形态演化过程,给出了固/液界面亚临界分叉范围。结果表明,采用耦合热力学计算技术能更好的与试验结果吻合,所获得的失稳区域大于采用线性化二元参数所得结果,尤其在线性稳定性判据条件下更为突出。
The morphological linear stability and non-linear stability of solid-liquid interface of Al-Zn dilute binary alloy were investigated by thermodynamics method. Different stable regions between linear-stability and nonlinear stability of solid-liquid interface were approached, which was calculated by the thermo-dynamic method and the linear binary parameter method, respectively. Interface morphology evolution after solid-liquid interface instability was analyzed, and sub-critical bifurcation range of solid-liquid interface was presented. The results reveal that the calculated results by coupling with thermo-dynamics method are more well in agreement with the experimental ones. Instable region calculated by the method is more than that by linear binary parameters, especially under linear-stability.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2011年第3期278-281,195,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51071129)
国家重点基础研究发展计划(973计划)资助项目(2011CB610400)
作者简介
第一作者简介：刘少军，男，1984年出生，硕士研究生，西北工业大学凝固技术国家重点实验室，西安（710072），电话：1512948015l，Email：shaojunliu0403@gmail．com
通讯作者：杨光昱，男，1967年出生，副教授，西北工业大学凝固技术国家重点实验室，西安（710072），电话：13679228998，E-mail：YgY@nwpu．edu．cn
