(華東船舶工業(yè)學(xué)院焊接系，鎮(zhèn)江 212003
浙江大學(xué)材料系，杭州 310027
華南理工大學(xué)機(jī)械系，廣州 510641)
摘 要: 在溫度為1 273～1423 K、時(shí)間為0.9～7.2 ks和0.1 MPa壓應(yīng)力的條件下進(jìn)行了Si3N4 /Ti/Ni/Ti/Si3N4的部分瞬間液相連接，結(jié)合SEM，EDS和XRD測(cè)試結(jié)果，分析了連接溫度和時(shí)間對(duì)接頭常溫四點(diǎn)彎曲強(qiáng)度和斷裂方式的影響。通過(guò)用反應(yīng)層厚度來(lái)表征界面強(qiáng)度，用 σθmaxRes來(lái)評(píng)價(jià)近界面陶瓷斷裂，用σθ=0Res來(lái)評(píng)價(jià)界面斷裂，建立了界面強(qiáng)度、陶瓷強(qiáng)度和殘余應(yīng)力與接頭強(qiáng)度和三種斷裂類型的關(guān)系模型。
關(guān)鍵字: 界面強(qiáng)度 接頭強(qiáng)度 殘余應(yīng)力
（Department of Welding, East China Shipbuilding Institute,Zhenjiang 212003, P. R. China
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
Department of Mechanical, South China University of Science and Technology, Guangzhou 510641, P. R. China）
Abstract:Partial transient liquid-phase bonding was performed using Ti/Ni/Ti multi-interlayers on Si3N4 ceramic under the conditions of temperature 1273～1423 K, time of 0.9～7.2 ks and pressure of 0.1 MPa in a vacuum. The effects of bonding temperature and time on four-point bending strength and fracture type of the joints were investigated, based on the experimental results by SEM, EDS and XRD analyses. By using the thickness of reaction layer to characterize the interfacial strength, using residual stress σθmaxRes to evaluate the fracture in ceramic near the interface, and using residual stress σθ=0Res to evaluate the fracture along the interface, a model has been proposed to describe the relationship between interfacial strength, ceramic strength, residual stress and joint strength, and three fracture types.
Key words: interfacial strength; joint strength; residual stress
