산소-아세틸렌 토치의 조사각이 ZrB2-SiC UHTC 복합체 삭마 특성에 미치는 영향
(주)코리아스칼라
- 최초 등록일
- 2023.04.03
- 최종 저작일
- 2022.12
- 7페이지/ 어도비 PDF
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서지정보
ㆍ발행기관 : 한국재료학회
ㆍ수록지정보 : 한국재료학회지 / 32권 / 12호
ㆍ저자명 : 이승용, 공정훈, 송정환, 손영일, 김도경
목차
Abstract
1. 서 론
2. 실험방법
2.1. ZrB2-30 vol% SiC 복합체 제조
2.2. 내산화/내삭마성 실험 및 평가
3. 결과 및 고찰
4. 결 론
Acknowledgement
References
영어 초록
In this work, the ablation behavior of monolith ZrB2-30 vol%SiC (Z30S) composites were studied under various oxy-acetylene flame angles. Typical oxidized microstructures (SiO2/SiC-depleted/ZrB2-SiC) were observed when the flame to Z30S was arranged vertically. However, formation of the outmost glassy SiO2 layer was hindered when the Z30S was tilted. The SiC-depleted region was fully exposed to air with reduced thickness when highly tilted. Traces of the ablated and island type SiO2 were observed at intermediate flame angles, which clearly verified the effect of flame angle on the ablation of the SiO2 layer. Furthermore, the observed maximum surface temperature of the Z30S gradually increased up to 2,200 °C proving that surface amorphous silica was continuously removed while monoclinic ZrO2 phase began to be exposed. A proposed ablation mechanism with respect to flame angles is discussed. This observation is expected to contribute to the design of complex-shaped UHTC applications for hypersonic vehicles and re-entry projectiles.
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