摘要
将交变磁场引入自蔓延反应,研究其对陶瓷层的相结构的影响,采用NiO作为添加剂进行对比试验。试验结果表明,交变磁场并不改变陶瓷层的相组成。显微结构分析表明,随着磁感应强度的增加,α-Al2O3的枝晶尺寸减小,形态逐渐向细小的等轴晶形态过渡,在磁感应强度为0.2T时,出现等轴晶组织。NiO的加入增强了交变磁场的影响效果,在NiO加入量为0.4%时可以在0.1T的磁感应强度下得到细小的等轴晶组织。
Effects of alternative magnetic field on phase structure in ceramic layer of ceramic lined compound steel pipes fabricated by SHS were described,and NiO was added as additive to contrast. The results show that change of phase structure in ceramic layer can not be observed in alternative magnetic field. With increasing in magnetic flux intensity,size of α-Al2O3 is decreased,and morphology is gradually transformed into fine equiaxed grain structure. Effects of alternative magnetic field are strengthened by adding NiO,which results in the refinement of grain size at a lower magnetic flux density.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第7期596-598,共3页
Special Casting & Nonferrous Alloys
基金
山东理工大学科研基金资助项目(2006KJM31)
关键词
自蔓延
交变磁场
微观结构
细化晶粒
SHS,Alternative Magnetic Field,Microstructure,Grain Refinement
