지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.3
- 수록면
- 13 - 21 (9page)
- DOI
- 10.33162/JAR.2019.03.19.1.13
이용수
이 논문의 연구 히스토리 (3)
2019
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초록· 키워드
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Purpose: Failure mechanisms of alumina crucible for producing ultra-high purity alumina power were investigated and based on them, design of material were changed to improve the reliability of crucible.
Methods: The failed specimen aggregated in the field were analyzed using FE-SEM and the design of life test were established. After that, the accelerated degradation test were performed and life model were predicted.
Results: It was identified that the thermal shock strength and the thermal fatigue life are trade off relation which can be controlled by porosity of alumina. Therefore, by reducing porosity from 2% to 4%, thermal shock strength and thermal fatigue life could be optimized. The life distribution is log-normal with average 0.21 and standard deviation 0.23. The acceleration model was identified as the coffin-manson relation with material constant 0.21.
Conclusion: It was identified that the alumina with 2% porosity has better reliability than the alumina with 4% porosity. That was proved by accelerated degradation test and failure analysis.
Methods: The failed specimen aggregated in the field were analyzed using FE-SEM and the design of life test were established. After that, the accelerated degradation test were performed and life model were predicted.
Results: It was identified that the thermal shock strength and the thermal fatigue life are trade off relation which can be controlled by porosity of alumina. Therefore, by reducing porosity from 2% to 4%, thermal shock strength and thermal fatigue life could be optimized. The life distribution is log-normal with average 0.21 and standard deviation 0.23. The acceleration model was identified as the coffin-manson relation with material constant 0.21.
Conclusion: It was identified that the alumina with 2% porosity has better reliability than the alumina with 4% porosity. That was proved by accelerated degradation test and failure analysis.
목차
1. 서론
2. 신뢰성 설계
3. 실험
4. 결론
References
참고문헌 (13)
참고문헌 신청
Kingery, W. D. / 1976 / Introduction to ceramics / John Wiley & Sons
Hasselman, D. P. H. / 1969 / Unified theory of thermal shock fracture initiation and crack propagation in brittle ceramics / Journal of the American Ceramic society 52(11):600~604
Kawai, C. / 1997 / Effect of porosity and microstructure on the strength of Si3N4: designed microstructure for high strength, high thermal shock resistance, and facile machining / Journal of the American Ceramic Society 80(10):2705~2708
She, J. / 2002 / Thermal shock behavior of porous silicon carbide ceramics / Journal of the American Ceramic Society 85(8):2125~2127
Ding, S. / 2006 / Thermal shock resistance of in situ reaction bonded porous silicon carbide ceramics / Materials Science and Engineering:A 425(1-2):326~329
Hasselman, D. P. H. / 1969 / Unified theory of thermal shock fracture initiation and crack propagation in brittle ceramics / Journal of the American Ceramic society 52(11):600~604
Kawai, C. / 1997 / Effect of porosity and microstructure on the strength of Si3N4: designed microstructure for high strength, high thermal shock resistance, and facile machining / Journal of the American Ceramic Society 80(10):2705~2708
She, J. / 2002 / Thermal shock behavior of porous silicon carbide ceramics / Journal of the American Ceramic Society 85(8):2125~2127
Ding, S. / 2006 / Thermal shock resistance of in situ reaction bonded porous silicon carbide ceramics / Materials Science and Engineering:A 425(1-2):326~329
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UCI(KEPA) : I410-ECN-0101-2019-323-000567963