The microstructure and concentration profiles in the B2 phase region of the diffusion couples of Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems were examined by EPMA. A pseudo-interface between β1, (low Al) / β2 (high Al) characterized by a sharp change in the concentration profiles of both Al and the alloying element is observed in composition range near 50at%Al. The characteristic features of the concentration profiles in the Ni-Al base ternary diffusion couples are presented and the up-hill diffusion of alloying elements observed at the pseudo-interface of the Ni-Al-X (X: Ti, V, Cr, Mn, Fe, Co and Cu) ternary systems is discussed from a thermodynamic point of view.
|ジャーナル||Defect and Diffusion Forum|
|出版ステータス||Published - 1997|
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