硅酸盐学报2012，Vol.40Issue(11)：1660-1665,6.
Al2O3/TC4 合金钎焊接头中TiB晶须对接头组织结构及力学性能的影响
Effect of TiB Whiskers on Microstructure and Mechanical Properties ofAl2O3/TC4 Alloy Joint
摘要
Abstract
Al2O3 and TC4 were brazed at a brazing temperature of 930 ℃ for 10min with CuTi, CuTi+B and CuTi+TiB2 fillers, re- spectively. The effect of TiB whiskers on the microstructure and mechanical properties of Al2O3/TC4 alloy joints was investigated by using scanning electron microscopy, transmission electron microscopy and shear testing. The TiB whiskers were in-situ synthesized in Al2O3/TC4 alloy joint when B and TiB2 were added. The size of TiB whiskers synthesized from B powder is smaller than that synthe- sized from TiB2 powder. There exist five areas divided in Al2O3/TC4 alloy joints under the influence of TiB whiskers, which presents a ductile-rigid-ductile sandwich stucture. The structure could favor the decrease of the residual stresses of joints and the improvement of the mechanical properties of joints. The maximum shear strength of joint brazed with CuTi+TiB2 filler is 143 MPa, which is 239% of that brazed with CuTi filler.关键词
氧化铝/钛合金/硼化钛晶须/组织结构/抗剪强度Key words
alumia/titanium alloy/titanium boride whiskers/microstructure/shear strength分类
矿业与冶金引用本文复制引用
杨敏旋,林铁松,何鹏,黄玉东,刘凤美,刘师田..Al2O3/TC4 合金钎焊接头中TiB晶须对接头组织结构及力学性能的影响[J].硅酸盐学报,2012,40(11):1660-1665,6.基金项目
国家自然科学基金资助项目 （）
黑龙江省自然科学基金资助项目 （）
中国国家博士后基金资助项目 （）
广东省部产学研结合项目资金资助项目 （）
高等学校博士学科点专项科研基金优先发展领域课题（2011.2302130005）. （）
