서지주요정보
$L1_2(Al,Cr)_3Ti$ 합금의 상안정성에 미치는 합금원소 첨가효과 = Effects of alloying elements on the phase stability of $L1_2 (Al,Cr)_3Ti$ coating materials
서명 / 저자 $L1_2(Al,Cr)_3Ti$ 합금의 상안정성에 미치는 합금원소 첨가효과 = Effects of alloying elements on the phase stability of $L1_2 (Al,Cr)_3Ti$ coating materials / 오민욱.
저자명 오민욱 ; Oh, Min-Wook
발행사항 [대전 : 한국과학기술원, 2002].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8012912

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 02021

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Thermal stability of $L1_2$ $(Al,Cr)_3Ti$ alloys was investigated. In order to investigate of thermal stability in $L1_2$-single phase, Al-25Ti-10Cr and Al-29Ti-11Cr alloys were exposed at 1150℃ and 800℃. $L1_2$ phase in Al-29Ti-11Cr was completely decomposed to Al2Ti and TiAlCr, while $L1_2$ phase in Al-25Ti-10Cr. As a result of it, it was known $L1_2$ phase field didn't only shrink, but also moves to Al-corner with decreasing temperature from 1150℃ to 800℃. Thermal stability of $L1_2$ -based two phase alloys was investigated. $L1_2$ phase in Al-30Ti-15Cr which was Ti-rich phase was completely decomposed and mechanical property of the alloy was greatly deteriorated. $L1_2$ phases in Al-21Ti-23Cr and Al-21Ti-15Cr which were Al-rich phase were also decomposed, and mechanical property of the alloys was deteriorated. To improve the thermal stability of Al-21Ti-23Cr, alloying elements were added to the alloy. $L1_2$ phase in Cu, Ag, Fe which substitute for Cr added alloy was decomposed, while $L1_2$ phase in Hf and Y which substitute for Ti added alloy was still stable after 800℃ 10 h exposure. Mechanical property of Hf added alloy was superior to the original alloy. It was suggested that Hf added Al-20Ti-23Cr -1Hf was suitable for oxidation-resistant coating alloys for TiAl in respect to thermal stability and mechanical property.

서지기타정보

서지기타정보
청구기호 {MMS 02021
형태사항 iv, 72 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Min-Wook Oh
지도교수의 한글표기 : 위당문
지도교수의 영문표기 : Dang-Moon Wee
학위논문 학위논문(석사)- 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 69-72
주제 상안정성
내산화코팅재료
합금첨가
trialuminide
phase stability
$L1_2$
alloying element
$Al_3Ti
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