文献类型：期刊文章

作　　者：尹付成[1] 赵满秀[1] 刘永雄[1] 韩炜[1] 李智[1]

机构地区：[1]湘潭大学机械工程学院,材料设计及制备技术湖南省重点实验室,湘潭411105

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

基　　金：Project (51071135) supported by the National Natural Science Foundation of China;Project (20114301110005) supported by the Ph. D.Programs Foundation of Ministry of Education of China;Project (10XZX15) supported by the Science Foundation of Xiangtan University,China

年　　份：2013

卷　　号：23

期　　号：2

起止页码：556-561

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The effect of Si on the growth kinetics of intermetallic compounds during the reaction of solid iron and molten aluminum was investigated with a scanning electron microscope coupled with an energy dispersive X-ray spectroscope, and hot-dip aluminized experiments. The results show that the intermetallic layer is composed of major Fe2Al5 and minor FeAl3. The Al-Fe-Si ternary phase, rl/rg, is formed in the Fe2Al5 layer. The tongue-like morphology of the Fe2Als layer becomes less distinct and disappears finally as the content of Si in aluminum bath increases. Si in the bath improves the prohibiting ability to the growth of Fe2Als and FeAl3. When the contents of Si are 0, 0.5%, 1.0%, 1.5%, 2.0% and 3.0%, the activation energies of Fe2Al5 are evaluated to be 207, 186, 169, 168, 167 and 172 kJ/mol, respectively. The reduction of the activation energy might result from the lattice distortion caused by Si atom penetrating into the Fe2Al5 phase. When Si atom occupies the vacancy site, it blocks easy diffusion path and results in the disappearance of tongue-like morphology.

关 键 词：intermetallic compound  Fe-Al system  growth kinetics  activation energy  SI hot-dip aluminizing  diffusion reaction  

分 类 号：TG111.6]