【摘要】 电真空应用中,要求高纯氧化铝与金属钛的连接接头不仅要有较好的强度,还要有高的气密性。用Ag-Cu-Ti钎料钎焊高纯氧化铝陶瓷与金属钛,钎焊温度为825~875℃,保温时间为15~20 min,陶瓷表面为烧结自然表面时,钎焊接头抗剪强度可达到100 MPa以上,连接温度过低或过高,保温时间过短或过长均对接头强度不利。陶瓷表面研磨后,接头强度降低。钎料厚度在60μm或105μm对接头强度的影响不大。接头由Al2O3/反应层(Cu,Al,Ti,O)/Ag+Cu-Ti化合物/α-Ti(Cu)/Ti构成。反应层主要以Cu3Ti3O和Cu4Ti为主。更多还原

【Abstract】 The joints of high purity alumina ceramics and Ti metal with high strength and tightness are needed in electron tube.The joints with shear strength higher than 100 MPa could be achieved by brazing with Ag-Cu-Ti at the temperature of 825-875 ℃ and the holding time of 15-20 min.Lower or higher temperature and shorter or longer holding time are detrimental to joint strength,and the joint strength decreased when the ceramic surface was abraded.The joint consisted of Al₂O₃/reaction layer/Cu-Ti compounds+Ag/α-Ti（Cu）/Ti.The main products in the reaction layer were Cu₃Ti₃O and Cu₄Ti.更多还原