Ni基高温钎料对Cf/SiC陶瓷基复合材料的润湿性研究

Wettability Research of Nickel-based High Temperature Filler Metal on C_f/SiC Ceramic Matrix Composite

研究了温度和活性元素Cr对Ni基高温钎料在3D-Cf/SiC陶瓷基复合材料上润湿的影响。采用扫描电镜与能谱仪检查界面微观结构与元素分布,通过X射线衍射仪检测界面产物。实验结果表明:升高温度,Ni基钎料在Cf/SiC上的润湿角减小;并且随钎料中的Cr的质量分数增加,润湿角减小。润湿过程属于反应润湿,润湿界面生成多种碳化物和硅化物。

The influence of temperature and active element chromium to wettability of several nickel-based high temperature filler metals on three-dimension carbon fiber reinforced silicon carbide compos- ite （3D-Cf/SiC） was studied in this paper. Additionally, the interfaces between filler metals and Cf/ SiC were inspected using scanning electron microscopy （SEM）, energy dispersive spectroscopic （EDS） analyses and X-ray diffractometry （XRD）. It was found that the contact angle decreased with the temperature rising, also the mass fraction of element chromium has much influence on the wettability, the content of chromium increases, so the contact angle decreases. The wetting procedure is reactive wetting, and several carbides and silicides were made at interface.