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- W2079346026 abstract "In the ${mathrm{Ni}}_{3}{mathrm{Al}}_{0.52}{mathrm{V}}_{0.48}$ alloy, $mathrm{D}{0}_{22}$ precipitation in the supersaturated $mathrm{L}{1}_{2}$ matrix has been found to stagnate due to the occurrence of the $mathrm{L}{1}_{2}ensuremath{rightarrow}mathrm{L}{1}_{2}+mathrm{D}{0}_{22}ensuremath{rightarrow}mathrm{L}{1}_{2}$ structural change in an isothermal process. In this paper, we experimentally show the variation of the $mathrm{L}{1}_{2}$ and $mathrm{D}{0}_{22}$ chemical compositions during the structural change. Our results reveal that the transient $mathrm{D}{0}_{22}$ formation accompanies a large concentration fluctuation, while the final $mathrm{L}{1}_{2}$ composition reverts back to the initial ${mathrm{L1}}_{2}$ one. It is also found that the average V content of the $mathrm{D}{0}_{22}$ regions decreases together with the change in the $mathrm{L}{1}_{2}∕mathrm{D}{0}_{22}$ habit planes from the ${100}$ to ${110}$ ones. These experimental results are indicative of the suppression of atomic diffusion and subsequent redistribution of $mathrm{Al}$ and $mathrm{V}$ in the $mathrm{L}{1}_{2}$ matrix, resulting in $mathrm{D}{0}_{22}$ annihilation. It is proposed that jump site selectivity and cooperative atomic migration in the $mathrm{L}{1}_{2}$ structure are important factors in the suppression of atomic diffusion. Because the appearance of these factors correlates well with the vacancy concentration of the $mathrm{L}{1}_{2}$ matrix, it is concluded that the stagnation of $mathrm{D}{0}_{22}$ precipitation represents one kinetic process under the present thermodynamic path." @default.
- W2079346026 created "2016-06-24" @default.
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- W2079346026 date "2004-09-22" @default.
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- W2079346026 title "Kinetic process of the phase separation in the alloy<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ni</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant=normal>Al</mml:mi></mml:mrow><mml:mrow><mml:mn>0.52</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant=normal>V</mml:mi><mml:mrow><mml:mn>0.48</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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- W2079346026 doi "https://doi.org/10.1103/physrevb.70.094111" @default.
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