TY - JOUR
T1 - Structural and hydriding properties of the Mg-Ni-H system with nano- and/or amorphous structures
AU - Orimo, S.
AU - Ikeda, K.
AU - Fujii, H.
AU - Fujikawa, Y.
AU - Kitano, Y.
AU - Yamamoto, K.
N1 - Funding Information:
Ackno~~ledgenzents-This work was financially supported from the Research Development Corporation of Japan and the Hiroshima Prefecture. The authors wish to acknowledge Mr. T. Kamino and Ms. T. Yaguchi of Hitachi Techno Research. for valuable high-resolution TEM observations.
PY - 1997/6
Y1 - 1997/6
N2 - The alloys Mg-x at.%Ni (x = 33, 38, 43 and 50) with different nanometer-scale structures were successively synthesized by mechanical grinding of Mg2Ni mixed with various amounts of additional Ni, and the relations between their structural and hydriding properties were investigated in detail. The total hydrogen contents in these alloys increase from 1.7 mass% for x = 33 to 2.2 mass% for x = 43 and 50. This result is explainable by estimating both the volume fractions and the maximum hydrogen contents of three regions in each alloy: the intra-grain region of nanostructured Mg2Ni, its inter-grain region, and the amorphous MgNi region. The dehydriding temperature lowers down to 373 K in the alloy composed of only the amorphous MgNi region, while the dehydriding kinetics of the alloy composed of the above three regions are faster than those of only the amorphous MgNi region.
AB - The alloys Mg-x at.%Ni (x = 33, 38, 43 and 50) with different nanometer-scale structures were successively synthesized by mechanical grinding of Mg2Ni mixed with various amounts of additional Ni, and the relations between their structural and hydriding properties were investigated in detail. The total hydrogen contents in these alloys increase from 1.7 mass% for x = 33 to 2.2 mass% for x = 43 and 50. This result is explainable by estimating both the volume fractions and the maximum hydrogen contents of three regions in each alloy: the intra-grain region of nanostructured Mg2Ni, its inter-grain region, and the amorphous MgNi region. The dehydriding temperature lowers down to 373 K in the alloy composed of only the amorphous MgNi region, while the dehydriding kinetics of the alloy composed of the above three regions are faster than those of only the amorphous MgNi region.
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U2 - 10.1016/S1359-6454(96)00357-6
DO - 10.1016/S1359-6454(96)00357-6
M3 - Article
AN - SCOPUS:0031166224
SN - 1359-6454
VL - 45
SP - 2271
EP - 2278
JO - Acta Materialia
JF - Acta Materialia
IS - 6
ER -