%0 Journal Article
%T A new model for calculating critical cooling rates of alloy systems based on viscosity calculation<br>基于成分连续变化计算黏度的合金系临界冷速模型
%A Wang Zhen-Yu
%A Yang Yuan-Sheng
%A Tong Wen-Hui
%A Li Hui-Qiang
%A Hu Zhuang-Qi
%A <br>王珍玉
%A 杨院生
%A 童文辉
%A 李会强
%A 胡壮麒
%J 物理学报
%D 2007
%I 
%X Based on the model for calculating the critical cooling rate of bulk metallic glasses under non-isothermal condition, a new model for calculating the critical cooling rate of alloy systems based on viscosity calculation is put forward in this paper. The critical cooling rates of Zr-Ni-Al-Cu quaternary alloys were calculated and the glass forming range in Zr66.67(NixAlyCuz)33.33 quaternary alloy system is predicted. The results are in good agreement with the experimental values. The calculation results show that there is high glass forming ability in Zr66.67(NixAlyCuz)33.33 quaternary alloy system. The glass forming range is near eutectic point in which critical cooling rates are less than 100 K/s. There is not crystallization in the temperature range higher than 1000K, the fraction of crystals increases rapidly in the temperature range from 980 K to 870 K, and it is not changed in the temperature range below 870 K. In addition, the effects of Al,Cu,Ni mole fraction on the critical cooling rate are analyzed in this paper.
%K bulk metallic glass
%K viscosity
%K critical cooling rate
%K glass forming ability<br>大块非晶
%K 黏度
%K 临界冷却速率
%K 非晶形成能力
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=343ABCEA127B56EE&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=38B194292C032A66&sid=815F249353800F81&eid=C28CDC724DDFD536&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=15