摘要
采用座滴法研究了不同Al含量、不同温度和保温时间对Ni-Al/SiC体系界面润湿性的影响,通过SEM、XRD分析了Ni-Al/SiC体系的润湿机理。结果表明,Ni-Al系焊料与SiC陶瓷的润湿过程属化学润湿,在本研究的试验范围之内,随着Al含量增加、温度升高、保温时间延长,润湿角下降。由于界面反应产物Al4C3的生成导致的扩散层体积增大是Ni-Al/SiC体系润湿性得到改善的关键。
By using the sessile drop method , the wettability behavior between Ni-Al powders and SiC ceramics was studied. The mechanism of reactive wetting of metal/ceramics was investigated on the basis of SEM and XRD. The results show that the final contact angle decreases with increasing of the Al content. Also, the contact angle decreases with increasing of the temperature and prolonging of the dwelling time respectively. The types of the resultants at the interface depend on the composition of the original metallic powders and the technological parameters of the test. Al4C3, which causes the interracial reaction layer expanding, is the predominant contribution to the wetting.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2006年第3期163-165,共3页
Powder Metallurgy Technology
基金
中国航空基础科学基金
中国国家自然科学基金(50271003)资助项目
关键词
化学润湿
接触角
动力学
chemical wettability
contact angle
wetting dynamics
