Oxidation behavior of alumina-forming duplex stainless steels in high temperature steam environments = 고온 수증기 환경에서 알루미나 형성 듀플렉스 스테인리스강의 산화 거동

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Oxidation behavior of alumina-forming duplex stainless steels (ADSS), which are developed as accident tolerant fuel cladding materials, and commercial FeCrAl alloy, APM, were evaluated as the alloys exposed to pure steam and hydrogen added steam environments at various temperature. When the ADSS was exposed to pure steam at $800^\circ C$, $900^\circ C$ and $1050^\circ C$, weight gain after $900^\circ C$ oxidation was highest value due to formation of transient alumina. Weight gain after 800 oC exposure was lower value. As compared to APM, similar oxidation behavior was shown at $800^\circ C$. Since some spinel oxide was found on the ADSS alloys above $900^\circ C$, ADSS had higher weight gain than APM above $900^\circ C$ exposure. Additionally, it seems that the spinel oxide was formed at early state of high temperature oxidation and usually on austenite phase, which has lower aluminum content in the matrix than ferrite phase. Also, the oxidation behavior of ADSS was evaluated after exposure to hydrogen added environment. The difference in weight gain was not much significant
Advisors
Jang, Changheuiresearcher장창희researcher
Description
한국과학기술원 :원자력및양자공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력및양자공학과, 2019.2,[v, 54 p. :]

Keywords

Alumina-forming duplex stainless steel▼aaccident tolerant fuel cladding▼ahigh temperature steam▼ahydrogen added steam environment▼aalumina; 알루미나 형성 듀플렉스 스테인리스강▼a사고 저항성 피복관▼a고온 수증기▼a수소 첨가 수증기 환경▼a알루미나

URI
http://hdl.handle.net/10203/266577
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843348&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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