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℃/10 min的连接条件下得到的接头室温三点抗弯强度平均值为84.6 MPa.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)_5Si_3C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V_2C和Cr_(23)C_6.
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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期1181-1185,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金项目59905022
50475160
武器装备预研基金项目51418050304HK5104资助~~
关键词
SIC
润湿
界面反应
钎料
SiC, wetting, interface reaction, brazing filler
