503 円弧状自由縁を有する異材接合体の引張強度に及ぼす界面端形状の影響(OS8:接合・複合材料の強度と力学(1),学術講演)

概要

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The focus of this study is to clarify an effect of interface edge shape on bonding strength of ceramic to metal joint. Each plate Si_3N_4 to Cu joint with arc free-edge is produced by Electric Discharge machining. The interface edge shape is characterized by edge angle defined as a configuration angle between tangential line at the edge of the interface and the interface of the joint. Each joint is bonded at high temperature by using thin braze metal under vacuum and slowly cooled. A good fit on each bonded face is achieved in this process. The dependence of the bonding strength on the edge angle is experimentally clarified. The result shows that changing the edge angle from the right angle improves the bonding strength since it decreases the residual stress near edge of the interface. The highest bonding strength always appears at the identical interface condition where fracture pattern changes. It appears that the optimum edge angle for obtaining the highest bonding strength depends on bonding temperature. The low obtained in this study provides as a similar model for bonded dissimilar materials with arc interface of convexity and concavity.
社団法人日本機械学会の論文
2005-11-25