摘要
在钎焊温度高于SiCp/LY12复合材料起始熔融温度的条件下,采用Al 28Cu 5Si 2Mg钎料在真空中仍能实现对SiCp/LY12复合材料的钎焊连接。研究结果表明:SiCp/LY12复合材料的熔化特性、快速的钎焊热循环和钎料中含合金元素Mg是实现对SiCp/LY12复合材料的钎焊连接的主要因素。分析了SiCp/LY12复合材料钎焊连接强度的影响因素和界面特征。提高液态钎料对SiC的润湿性、降低连接区的弱连接比例、减少过渡到钎缝中的SiC颗粒,是改善钎焊连接强度的重要途径。
The vacuum brazing of SiC_p/LY12 by using filler metal of Al-28Cu-5Si-2Mg is feasible, though brazing temperature is higher than the incipient melting temperature of SiC_p/LY12. The effects of joint strength and interface character in SiC_p/LY12 matrix composite bonding were discussed in detail. The results show that viable brazing of SiC_p/LY12 is lain on its melting characteristic, fast braze thermal cycle and action of Mg in the filler metal. The key methods of improving the joint strength are to raise the wettability of filler metal on SiC substrates, to decrease the proportion of feeble bonding in interfacial region and to reduce SiC particulates transited to brazing seam.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2004年第1期74-78,共5页
The Chinese Journal of Nonferrous Metals
基金
江苏省青年科技基金资助项目(BQ98021)
