%0 Journal Article
%T A simulation study for the effects of cooling rate on evolution of microstructures during solidification of liquid metal Ga<br>冷速对液态金属Ga凝固过程中微观结构演变影响的模拟研究
%A Zhang Hai-Tao
%A Liu Rang-Su
%A Hou Zhao-Yang
%A Zhang Ai-Long
%A Chen Xiao-Ying
%A Du Sheng-Hai
%A <br>张海涛
%A 刘让苏
%A 侯兆阳
%A 张爱龙
%A 陈晓莹
%A 杜生海
%J 物理学报
%D 2006
%I 
%X A simulation tracing study has been performed for the effects of different cooling rates on the evolution of microstructures during solidification process of liquid metal Ga by means of molecular dynamics method. The bond-types and basic cluster structures of metal Ga have been analyzed by using HA bond-type index method and cluster-type index method. It has been found that the cooling rate plays an important role to the microstructures in the solidification processes. At the cooling rates of 1.0×1014 K/s, 1.0×1013 K/s and 1.0×1012 K/s, the amorphous structures would be formed in the system with the rhombohedron related to 1311, 1301 bond-types as the main body, and coexist with the fcc, hcp and other structures; at the cooling rate of 1.0×1011K/s, crystallization would take place in the system, the crystalline transition temperature Tc being about 198K, and the lower the cooling rate, the higher the Tc. The crystal would have the orthorhombic structure related to 1421 bond-type(determined by visualized method) as the main body. This gives us a new way for researching the crystalline transition processes of liquid metals.
%K liquid metal Ga
%K solidification process
%K microstructure transition
%K molecular dynamics simulation<br>液态金属Ga
%K 凝固过程
%K 微结构转变
%K 分子动力学模拟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=75EB67285CDE840E&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=94C357A881DFC066&sid=78DB415DA3204EAF&eid=0DA35393715E494A&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=24