서지주요정보
$L1_2$기 Al-Ti-Cr합금의 상안정성에 미치는 Zr첨가효과 = Effects of Zr addition on the phase stability of $L1_2$ -based Al-Ti-Cr alloys
서명 / 저자 $L1_2$기 Al-Ti-Cr합금의 상안정성에 미치는 Zr첨가효과 = Effects of Zr addition on the phase stability of $L1_2$ -based Al-Ti-Cr alloys / 천동현.
저자명 천동현 ; Chun, Dong-Hyun
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014025

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 03039

휴대폰 전송

도서상태

이용가능

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반납예정일

초록정보

Effects of Zr addition on the phase stability of $L1_{2}$-based Al-Ti-Cr alloys was investigated and moreover in order to improve the thermal stability of Al-21Ti-23Cr, Zr was added to the alloy. As a result of exposing Zr added alloys at 800$^\circ$C for 10 and 100hr, it was found that $L1_{2}$ phase decomposition was repressed by Zr addtion. Considering both mechanical properties and phase stability, 3 at.\% of Zr addition were suitable. As a result of aging Al-21Ti-23Cr and Al-18Ti-23Cr-3Zr at 800$^\circ$C for 100 and 500hr, it was found that $L1_{2}$ phase decomposition was repressed for 500hr by Zr addition. Phase decomposition of $L1_{2}$ phase with aging temperature was investigated. Fraction of $L1_{2}$ phase decomposition was decreased all over the temperatures by Zr addition and besides temperature range of $L1_{2}$ phase decomposition became narrow as Zr addition. In three-point bend tests to investigate the correlation between enhanced phase stability and fracture toughness, Al-18Ti-23Cr-3Zr alloy exhibited better cracking resistance after exposure at 800$^\circ$C than Al-21Ti-23Cr. This demonstrated that improved phase stability resulted in the enhancement of fracture toughness of $L1_{2}$-based alloys. Therefore, in the Al-Ti-Cr system, Zr added $L1_{2}$-based alloys are more appropriate for the application of coating materials when considering phase stability coupled with fracture toughness.

서지기타정보

서지기타정보
청구기호 {MMS 03039
형태사항 vii, 68 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Dong-Hyun Chun
지도교수의 한글표기 : 위당문
지도교수의 영문표기 : Dang-Moon Wee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 65-68
주제 상안정성
L12
내산화코팅
Zr첨가
상안정성
L12
oxidation resistant coating
Zr addition
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