中文摘要：

采用座滴法研究了PdNi—Cr-V合金钎料对SiC陶瓷的润湿性．设计的PdNi-（16-22）Cr-（7—21）V—Si—B（质量分数）钎料可用于SiC的连接，使用急冷态箔状钎料，在1190℃／10min的连接条件下得到的接头室温三点抗弯强度平均值为84．6MPa．微观分析表明，在靠近SiC的界面反应层中，主要是Pd和Ni优先与SiC反应生成相应的Pd-Si相、Ni—Si相和石墨；离SiC稍远的接头区域，主要是Cr和V与C和Si发生反应，生成Cr（v）-C，Cr（V）-Si，Cr（V）5Si3C等相；钎缝中心区的基体由Pd-Si，Ni-Si和V—Si相组成，其上弥散分布着块状碳化物V2C和Cr23C6．

英文摘要：

Wettability of PdNi-Cr-V alloy on SiC was studied with the sessile drop method. The newly developed PdNi-（16-22）Cr-（7-21）V-Si-B （mass fraction,%） brazing filler could be used for joining SiC. The room temperature three-point bend strength of the SiC/SiC joints brazed with rapidly solidified brazing foils at 1190 ℃ for 10 min is 84.6 MPa. In the interfacial layer near to SiC, elements Pd and Ni preferentially diffused into SiC and resulted in the reaction products of Pd-Si phase, Ni-Si phase and graphite. In the reaction zone further away from the SiC, mainly elements Cr and V in the brazing filler participated in the interface reaction, and formed Cr（V）-C, Cr（V）-Si, Cr（V）sSi3C. In the central part of the joint, the matrix was composed of Pd-Si, Ni-Si and V-Si phases, on which some blocky carbides V2C, Cr23C6 distributed dispersively.