Ablation Behavior of ZrB2-SiC UHTC Composite under Various Flame Angle Using Oxy-Acetylene Torch

Seung Yong Lee; Jung Hoon Kong; Jung Hwan Song; Young Il Son; Do Kyung Kim

doi:10.3740/MRSK.2022.32.12.553

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2022 Vol.32, Issue 12 Preview Page Next Page

Ablation Behavior of ZrB₂-SiC UHTC Composite under Various Flame Angle Using Oxy-Acetylene Torch 산소-아세틸렌 토치의 조사각이 ZrB₂-SiC UHTC 복합체 삭마 특성에 미치는 영향

December 2022. pp. 553-559

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Abstract

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.

Keywords

ZrB₂-SiC composite

flame angle

ablation behavior

oxy-acetylene torch

hot-press

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 32
No :12
Pages :553-559
Received Date : 2022-10-04
Revised Date : 2022-11-11
Accepted Date : 2022-12-04
DOI :https://doi.org/10.3740/MRSK.2022.32.12.553

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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