Diffusion of platinum, vanadium and manganese in Ni3Al phase under high pressure |
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| Authors: | T. Yamane K. Hisayuki H. Yoshida Y. Minamino H. Araki K. Hirao |
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| Affiliation: | (1) Department of Mechanical Engineering,, Hiroshima Institute of Technology,, 2-1-1 Miyake, Saeki-ku,, Hiroshima 731-5193,, Japan;(2) Department of Materials Science and Engineering,, Osaka University,, 2-1 Yamada-oka, Suita,, Osaka 565-0871,, Japan |
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| Abstract: | Diffusion of platinum, vanadium, and manganese in the Ni3Al phase is investigated under high pressure. Platinum atoms occupy cubic face centred sites (α) in the L12 ordering structure. Vanadium atoms occupy cubic corner sites (β). Manganese atoms occupy both sites. Activation volumes ΔV
for diffusion of these diffusing atoms to the molar volume of the Ni3Al phase V0 are as follows: These values mean that the diffusion of platinum is mediated by single vacancies, that of vanadium is done by divacancies
or other complex mechanisms, and that of manganese via single vacancies plus other mechanisms.
This revised version was published online in September 2006 with corrections to the Cover Date. |
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