(1.北京轻工业学院机械系,北京100037;
2.济华大学材料系,北京100084)
摘 要: 将工业纯铝(99.7%)用亚包晶成分的Ti(<0.15%)实行变质处理,采用电子衍射等方法研究其结晶核心,证明α-Al核心除丁TiC。TiC为立方晶格,粒子外,还存在Ti2C。TiC为立方晶体,a =0.4380nm;Ti2C为正交晶格,a=1.20nm,b=1.06nm,c=1.5.nm。
关键字: 碳化钛 晶核 亚包晶 铝
(1.Beijing Institute of Light Industry,Beijing 100037;
2.Tsinghua University,Beijing 100084)
Abstract:The crystallization center in commercially pure aluminium ( 99.7%)castings inoculated with hy-poperitectic titanium(<0. 15%) was nvestigated by electron diffraction. It has been found that the particles were composed of stoichiometric TiC, having cubic lattice with a=0. 438 0 nm,and Ti2C, having orthorhombic lattice with a=1. 20 nm,b =1.06 nm and c = 0. 50 nm.
Key words: crystallization aluminium TiC