摘要
通过对定向凝固过程中TiAl合金与氧化铝、氧化锆坩埚材料的界面化学反应进行研究,分析了夹杂物的分布规律以及反应机制。结果表明:氧化铝坩埚中的SiO2粘结剂与TiAl合金发生界面化学反应,使坩埚内壁的Al2O3颗粒脱落进入TiAl合金熔体,夹杂物在整个试样中呈弥散分布。TiAl合金与氧化锆坩埚的化学反应仅发生在合金试样表面,反应生成的黑色氧化锆具有较大脆性,并在试样表面形成厚厚的粘结层。
The interfacial chemical reaction of TiAl alloy and alumina, zirconia crucible materials were studied in the process of directional solidification, the distribution and reaction mechanisms of inclusions were analyzed. The results show that the interfacial chemical reaction presents between TiAl alloy and SiO2binder of alumina crucible, which make the Al2O3particles in inner wall of the crucible fall into TiAl alloy melt, and the inclusions are dispersed distribution in the samples. The chemical reaction of TiAl alloy and zirconia crucibles occurs only on the alloy sample surface, the black zirconia is brittle product, and the thick adhesive layer is formed on the surface of the specimen.
出处
《铸造技术》
CAS
北大核心
2014年第4期730-732,共3页
Foundry Technology
基金
四川省科技厅专业实训课程教学方法改革研究课题资助(JTZS200819)
关键词
TIAL合金
定向凝固
界面反应
TiAl alloys
directional solidification
interfacial reaction
