摘要
采用座滴法研究了Ni-Ti粉末在SiC陶瓷界面的润湿行为,结果显示,Ti含量增加、温度升高、保温时间延长,Ni-Ti/SiC陶瓷系统润湿性均得到改善。界面区域的SEM、EDS、XRD分析表明,活性元素Ti在界面富集形成富Ti化合物区域,可能生成的产物相有TiSi2、Ti5Si3、TiC、Ti2Ni和Ni3C,产物类型与金属粉料原始组分及润湿条件有关。当Ti含量为Ni-Ti粉末焊料的50%(质量分数)时,其产物为以TiC、Ti2Ni为主含少量Ni3C的混合物,借助于Ti2Ni的液相传质和TiC与SiC陶瓷良好的晶格匹配关系可以实现界面的良好润湿。
By using the sessile drop method, the wetting behavior between Ni-Ti powders and SiC ceramic was studied, which showed that the wettability of the system was improved by increasing the Ti content, the wetting temperature and the dwelling time. The microstructures of welded area and interracial reaction products were examined by SEM, EDS and XRD. The results showed that Ti-rich compound layer was in the interface of this wetting system. The types of the resultants at the interface depend on the composition of the original metallic powders and the technological parameters of the test, which were likely to be TiSi2 ,Ti5Si3,TiC,Ti2Ni and Ni3C. When the content of Ti was 50%, the reaction products mainly consisted of TiC and Ti2Ni, also included Ni3C at low content. A successful wetting of Ni-Ti/SiC system was realized by the liquid transmitter of Ti2Ni and the match of crystal lattice in TiC and SiC.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2006年第11期32-34,40,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50271003)
中国航空基础科学基金(03H51024)
关键词
金属/陶瓷
界面反应
化学润湿
SIC陶瓷
ceramic/metal
interfacial reaction
chemical wettability
SiC ceramic
