Cu＋B复合钎料配比对Al2O3／TC4合金钎焊接头界面组织的影响  

Effect of Cu+B composite fillers proportion on Al_2O_3/TC4 alloy joint microstructure

作　　者：杨敏旋[1] 林铁松[1,2] 韩春[1] 何鹏[1] 魏红梅[1] 

机构地区：[1]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001 [2]哈尔滨工业大学材料科学与工程学院电子封装技术,哈尔滨150001

出　　处：《焊接学报》2012年第7期33-36,40,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50975062;51105107;51021002);黑龙江省自然科学基金资助项目(QC2011C044);高等学校博士学科点专项科研基金优先发展领域课题(20112302130005);中央高校基本科研业务专项资金资助项目(HIT.BRET1.2010006HIT.NSRIF.2010119HIT.NSRIF.201135)

摘　　要：分别以不同配比的铜和硼混合粉末作为钎料,在钎焊温度930℃,保温时间10 min条件下钎焊连接Al2O3与TC4合金,并结合SEM与EDS观察对钎焊接头的连接状况及组织结构进行分析.结果表明,Al2O3/TC4合金钎焊接头的界面组织为Al2O3/Ti3(Cu,Al)3O/Ti2Cu+Ti2(Cu,Al)/Ti+Ti2(Cu,Al)+Ti(Cu,Al)+AlCu2Ti+Ti2Cu/Ti2Cu+AlCu2Ti+TiB/Ti+Ti2Cu/TC4合金.钎焊过程中,复合钎料中的铜与TC4合金中的钛发生互扩散,在连接层与TC4合金界面形成不同成分的Cu-Ti化合物.硼与液相中的钛反应,在接头中原位生成TiB晶须,且主要分布在Ti2Cu和AlCu2Ti上.随TiB生成量的增加,Ti2(Cu,Al)生成量增加,并逐渐变得连续,同时向Al2O3侧移动.The composite fillers with different proportions of Cu and B powders were used to braze Al2O3 to TC4 alloy at 930 ℃ for 10 min.The joining and microstructure of Al2O3/TC4 alloy joints were observed and analyzed by SEM and EDS.The results show that Al2O3/TC4 alloy joint interfacial microstructure is Al2O3/Ti3(Cu,Al)3O/Ti2Cu+Ti2(Cu,Al)/Ti+Ti2(Cu,Al)+Ti(Cu,Al)+AlCu2Ti+Ti2Cu/Ti2Cu+AlCu2Ti+TiB/Ti+Ti2Cu/TC4 alloy.Mutual diffusion of Cu atoms from composite filler and Ti atoms from TC4 allo[HJ1.3mm]y occurs during brazing process.Cu-Ti compounds with different components were formed in Al2O3/TC4 alloy joints.B reacts with Ti atoms in liquid,and in situ synthesizes TiB whiskers in joint,which mainly distribute into Ti2Cu and AlCu2Ti.With the increasing of TiB content,Ti2(Cu,Al) content increases,and becomes continuous gradually.At the same time,that moves to Al2O3 side.

关 键 词：AL2O3陶瓷 TCA合金 钎焊 界面组织 抗剪强度 

分 类 号：TG454[金属学及工艺—焊接]