| 브레이징 접합공정 조건이 SiN4/S.S. 316 접합체의 기계적 특성 및 신뢰도에 미치는 영향 |
| 장희석, 박상환1, 최성철 |
한양대학교 세라믹공학과
1한국과학기술연구원 복합기능세라믹스연구센터 |
| Effects of Brazing Processing Condition on Mechanical Properties and Reliability of Si3N/S.S. 316 Joints |
| Hwi-Souck Chang, Sang-Whan Park1, Sung-Churl Choi |
Department Inorganic Materials Engineering, Hanyang University
1Multi-functional Ceramics Research Center, KIST |
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| ABSTRACT |
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The microstructure change of brazed $Si_3N_4$/Stainless steel 316 joint with Cu buffer layer were examined to clarify the effects of brazing process conditions such as brazing time and temperature on the mechanical properties and reliability of brazed joints. For the brazed joint above 900${circ}C$, the Cu buffer layer was completely dissolved into brazing alloy and the thickness of reaction product formed at $Si_3N_4$/brazing alloy joint interface was abruptly increased, which could increase the amounts of residual stress developed in the joint. The fracture strength of brazed $Si_3N_4$/Stainless steel 316 joint with Cu buffer layer at 950${circ}C$ was much reduced comparing to those of joints brazed at the lower temperature. But, it was found that the effects of brazing time was not critical on the mechanical properties as well as the reliability of $Si_3N_4$/Stainless steel 316 joint with Cu buffer layer brazed at the temperature below 900${circ}C$. |
| Key words:
Silicon nitride, Brazing, Buffer layer, Joint strength, Reliability |
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