摘要
以单晶α-Al2O3陶瓷（蓝宝石）和单晶Cu为母材，采用真空扩散焊接获得具有两种不同的界面晶体位向关系的Cu/Al2O3扩散焊接头以及带Nb膜中间层的Cu/Nb/Al2O3扩散焊接头，研究了界面晶体位向关系对接头断裂能量的影响．结果表明，陶瓷-金属界面的晶体位向关系影响界面粘合功（Wad）和断裂过程中金属例所消耗的塑性变形功（Wp），从而影响接头的断裂能量．界面位向关系为Cu（100）[o11]Al2O3（0001[1120]的Cu／Al2O3接头断裂能量值最低，而具有相同位向关系的带Nb膜中间层的Cu/Nb/Al2O3。接头的断裂能量值则最高．
Single crystalline Cu and α-Al2O3(sapphire) with different crystallographic orientation relationships at the interface were diffusion-welded in vacuum with and without a thin film Nb intelayer Effects of the orientation relationship at the interface on the fracture energy of Cu/Al2O3, and Cu/Nb/Al2O3, diffusion-bonded joints were studied. Results show that the orientation refationship between Cu and α-Al2O3, single-crystals at the interface remarkably influences the fracture energy of the metal/ceramic Joint by changin both the werk of. adhesion of the metal-ceramic interface and the dissipated energy caused by plastic deformation of the metal side of the join. The Cu/Al2O3, joints with the orientation relationship Cu(100)[O11] Al2O3 (0001)[1120] have the lowest fracture energy values, while the Cu/Nb/Al2O3, joints with the are orientation relationship between Cu and Al2O3are the toughest among the theted joints.
出处
《大连铁道学院学报》
1999年第3期74-78,共5页
Journal of Dalian Railway Institute
基金
大连市青年科技基金
关键词
晶体位向
断裂性能
扩散焊接
高性能陶瓷
Al_2O_3/Cu interface
orientation relationship
fracture behaviour
diffusion welding
