The Reduction of Residual Stress Generated in Metal-Ceramic Joining
The Reduction of Residual Stress Generated in Metal-Ceramic Joining
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DOI：
10.1080/10426919808935271
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发表时间：
1998-07
影响因子：
4.8
通讯作者：
N. Tinsley;J. Huddleston;M. Lacey
中科院分区：
文献类型：
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作者：
N. Tinsley;J. Huddleston;M. Lacey
摘要 使用有限元分析来研究改变界面几何形状对轴对称金属陶瓷接头的影响。作者发现，增加界面角度不仅消除了自由边缘和界面边界相交处存在的奇点，而且接头中包含的峰值残余应力也大幅降低。进行了一个实验程序来验证理论结果。利用放电加工在导电的市售塞隆陶瓷上制造具有各种顶点高度的“新颖”凸陶瓷界面。随后使用银-铜-钛焊料将它们连接到配套的不锈钢构件上。随后的拉伸测试表明，与平面界面接头相比，拉伸强度显着增加，从而验证了理论模型并扩大了金属陶瓷接头在工程应用中的潜力。
Abstract Finite element analysis was used to investigate the effect of altering the interface geometry on a axi-symmetrical metal-ceramic joint. The authors found that increasing the interface angle not only eliminated the singularity that existed at the intersection of the free edge and the interface boundary, but also saw a drastic reduction in the peak residual stresses contained in the joint. An experimental program was undertaken to validate the theoretical result. Electrical discharge machining was utilized to fabricate ‘novel’ convex ceramic interfaces with a variety of apex heights on a conductive, commercially available sialon ceramic. They were subsequently joined, using a Ag-Cu-Ti braze, to mating stainless steel members. Subsequent tensile tests showed a dramatic increase in tensile strength compared to planar interface joints, thus validating the theoretical model and expanding the potential for metal-ceramic joints to be used in engineering applications.