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Characteristics of bending strength and residual stress distribution on high thermal cycle of ceramic and metal joint
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 Title & Authors
Characteristics of bending strength and residual stress distribution on high thermal cycle of ceramic and metal joint
Park, Young-Chul; Hue, Sun-Chul; Boo, Myoung-Hwan; Kim, Hyun-Su; Kang, Jae-Wook;
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 Abstract
Since the ceramic/metal joint material is made at a high temperature, the residual stress develops when it is cooled from bonding temperature to room temperature due to remarkable difference of thermal expansion coefficient between ceramic and metal. As residual stress at ceramic/metal joints influences the strength of joints, it is important to estimate residual stress quantitatively. In this study, it is attempted to estimate joint residual stress of SiNSTS304 joints quantitatively and to compare the strength of joints. The difference of residual stress is measured when repeated thermal cycl is loaded, under the conditions of the practical use of the ceramic/metal joint. The residual stress increases at 1 cycle of thermal load but decreases in 3 cycles to 10 cycles of thermal load. And 4-point bending test is performed to examine the influence of residual stress on fracture strength. As a result, it is known that the stress of joint decreases as the number of thermal cycle increases.
 Keywords
SiN/STS304 Joint;Residual Stress Distribution;X-Ray Stress Measurement;4-Point Bending Test;Fracture Strength;
 Language
Korean
 Cited by
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