文献类型：期刊文章

作　　者：徐聪[1] 杜柔[1] 王雪姣[1] Shuji HANADA[2] Hiroshi YAMAGATA[3] 王文红[4] 马朝利[1]

机构地区：[1]北京航空航天大学材料科学与工程学院,空天先进材料与服役教育部重点实验室,北京100191 [2]Institute for Materials Research, Tohoku University [3]Center for Advanced Die Engineering and Technology, Gifu University [4]河北四通新型金属材料股份有限公司,保定071105

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2012CB619503)supported by the National Basic Research Program of China;Project(2013AA031001)supported by the National High-tech Research and Development Program of China;Project(2012DFA50630)supported by the International Science and Technology Cooperation Program of China

年　　份：2014

卷　　号：24

期　　号：7

起止页码：2420-2426

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000340841700062)、SCI-EXPANDED(收录号：WOS:000340841700062)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：Al-1.0%Sc-1.0%Zr （mass fraction） master alloy was prepared at different cooling rates. The morphology and thermodynamics data of the primary particles of the master alloy were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and differential scanning calorimetry （DSC）. It shows that the primary particles are dendrite-shaped particles comprised of several attached small cubic, cusped-cubic or crucifer shape particles at slow cooling rate. However, the primary particles are separated with crucifer shape at intermediate cooling rate, and they are cubic with cusped-cubic shape at high cooling rate. Meanwhile, the separated and attached particles present AlaSc/AlaZr1-xScx core-shell structure. The formation mechanism of the structure was systematically investigated by a mathematical model.

关 键 词：Al-Sc-Zr master alloy  MORPHOLOGY core-shell structure  cooling rate  formation mechanism  

分 类 号：TG146.21[材料类]