Microstructures and grain refinement performance of Al-Ti-B-C grain refiner via powder metallurgy  

作　　者：Cong Xu Wen-Long Xiao Shi-Zhen Wen Yue-Jun Zhen Chao-Li Ma 

机构地区：[1]Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education,School of Material Science and Engineering,Beihang University,Beijing 100191,China [2]Lizhong Group,Baoding Lizhong Wheel Manufacturing Co.,Ltd.,Baoding 071000,China

出　　处：《Rare Metals》2022年第7期2357-2362,共6页稀有金属（英文版）

基　　金：financially supported by the National Basic Research Program of China (No. 2012CB619503);the National High Technology Research and Development Program of China (No. 2013AA031001);the International Science & Technology Cooperation Program of China (No. 2012DFA50630)

摘　　要：The Al-5Ti-0.5B-0.5C grain refiner was pre-pared by powder metallurgy(PM).Microstructures of the grain refiner and its grain refinement performance in commercially pure aluminum(Al)were investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),and differential scanning calorimetry(DSC).It is found that the average grain size of commercially pure Al can be reduced from~15,000 to~180μm by the addition of Al-5Ti-0.5B-0.5C grain refiner prepared by PM,based on 0.01 wt%Ti addition.The grain refinement efficiency begins to decrease slightly when the grain refiner is kept in the melt for 60 min.The grain refinement is attributed to high stability,proper size,and high density of Al3Ti,TiB2,and TiC particles.

关 键 词：Al–Ti–B–C Powder metallurgy MICROSTRUCTURE Grain refinement 

分 类 号：TG146.21[一般工业技术—材料科学与工程]