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학술발표회초록보기

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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Ordering in Vanadium-Iron-Hydrogen system observed by in situ neutron diffraction measurement

등록일
2015년 9월 3일 16시 36분 54초
접수번호
1292
발표코드
INOR.P-139 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 15일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
조인화, 이희주1, 최용남*
한국원자력연구원 중성자과학연구부, Korea
1서강대학교 물리학과, Korea
In situ neutron diffraction patterns of V3Fe alloys were measured at RT - 400C under D2 3 bar to observe an accelerated ordering in the vanadium-iron alloys by the hydrogen admission. Thanks to the neutron’s peculiar scattering properties by atoms, vanadium and iron are identified successfully while x-rays can hardly differentiate one atom from its adjacent atoms such as V from Fe. A new satellite peak appeared at 350 C following a simple thermal expansion of the initial structure (BCC) where V and Fe atoms are randomly occupied the same position. In addition, the appearance of this peak depends on the existence of hydrogen reversibly at 350 C. We tried to match the new phase to the expected ordered structure, A15 [1], and the results were quite acceptable. X-ray diffraction patterns of the sample and additionally prepared ex situ samples were also analyzed for complementary information. [1] J. Bloch et al., Phys. Rev. Lett. 108 (2012) 215503

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