DIFFUSION PROPERTIES AND PHASE TRANSITIONS OF THE METALLIC GLASS a-Zr2PdHx.

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Bowman, R.C.Jr
Cantrell, J.S.
Attalla, A.
Etter, D.E.
Craft, B.D.
Wagner, J.E.
Johnson, W.L.
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GLASS; METALLIC - Diffusion - INTERMETALLICS - ZIRCONIUM METALLOGRAPHY - Transformations;
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摘要
NMR measurements were made to deduce hydrogen diffusion parameters. Non-Arrhenius temperature dependence as well as enhanced hydrogen mobility was found for glassy a-Zr//2PdH//2//. //9 in contrast to Arrhenius behavior in two crystalline c-Zr//2PdH//2//. //9//0 phases. Differential scanning calorimetry and x-ray diffraction indicate that both the initial a-Zr//2Pd alloy and the amorphous hydride undergo irreversible transformations at elevated temperatures. Although a-Zr//2Pd forms the crystalline intermetallic, a-Zr//2PdH//2//. //9 can generate either crystalline Zr//2PdH//x or ZrH//x as the major decomposition product.
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