Some physical properties of Zr2CuH4.2 in relation to those observed for other MoSi2-type hydrides

Autor:	Robert C. Bowman, A. Attalla, J.S. Cantrell, G.C. Abell, A.J. Maeland
Rok vydání:	1992
Předmět:	Chemistry Hydride Mechanical Engineering Relaxation (NMR) Metals and Alloys Intermetallic Activation energy Tetragonal crystal system Crystallography Nuclear magnetic resonance Mechanics of Materials X-ray crystallography Materials Chemistry Ternary operation Monoclinic crystal system
Zdroj:	Journal of Alloys and Compounds. 185:7-17
ISSN:	0925-8388
DOI:	10.1016/0925-8388(92)90547-m
Popis:	The intermetallic compound Zr 2 Cu with the tetragonal MoSi 2 -type structure produces a metastable ternary hydride Zr 2 CuH x . Powder X-ray diffraction indicated a monoclinic unit cell for this phase when x = 4.2. Nuclear magnetic resonance of the proton rotating frame relaxation times gave an activation energy of 0.28 eV for hydrogen diffusion in Zr 2 CuH 4.2 . Irreversible changes in the proton relaxation times were noted after the Zr 2 CuH 4.2 sample had been heated above 500 K. X-ray diffraction confirmed the decomposition of the original ternary phase into a mixture of ZrH x and other components, including metallic copper.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b50f98e01034063ab9557f96fa5c838 https://doi.org/10.1016/0925-8388(92)90547-m Zobrazit plný text záznamu