서지주요정보
V-Ti-Fe 계 수소저장합금의 고온 thermal cycling시 퇴화거동에 관한 연구 = A study on the intrinsic degradation behavior of V-Ti-Fe based metal hydride alloy upon thermal cycling at high temperature
서명 / 저자 V-Ti-Fe 계 수소저장합금의 고온 thermal cycling시 퇴화거동에 관한 연구 = A study on the intrinsic degradation behavior of V-Ti-Fe based metal hydride alloy upon thermal cycling at high temperature / 박정건.
저자명 박정건 ; Park, Jeoung-Gun
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8007454

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 97014

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The intrinsic degradation of ($V_0.53Ti_0.47)_0.925Fe_0.075$ by thermally induced hydrogen absorption-desorption cycling at 600℃ was investigated using the P-C-Isothermal curves, the X-ray diffraction, thermal desorption analysis, SEM and TEM. After 400 thermal cycles, the hydrogen absorption capacity was decreased by about 25% of the value of the beginning of the cycling, This alloy showed different degradation behaviors of higher plateau region and lower plateau region. The hydrogen storage capacity was gradurally decreased at higher plateau region and abruptly decreased at lower plateau region. From the result of the thermal hydrogen desorption, X-ray diffraction and TEM, it is suggested that the intrinsic degradation of the lower plateau region is caused by the phase transformation from B.C.C to B.C.T and that of the higher plateau region is caused by the formation of amophous phase, From the result, phase transformation (from b.c.c to b.c.t) and amorphization must be prevented. Phase transeformation can be prevented by b.c.c stabilizer and amorphization with trasition metal of larger atomic radius. So, the decrease of storage capacity can be reduced by substitution of Fe with Cr which is effective to prevent V-Ti-Fe based alloy from phase-transforming and from forming of amorphous phase.

서지기타정보

서지기타정보
청구기호 {MMS 97014
형태사항 [iv], 59 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jeoung-Gun Park
지도교수의 한글표기 : 이재영
지도교수의 영문표기 : Jae-Young Lee
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 57-59
주제 초기매연제어시스템
Degradation
Thermal cycling
Plateau region
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