銅-希土類合金の溶製に関する熱力学的研究: III.Cu-YおよびCu-Gd系

概要

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Thermodynamic consideration on melting of copper based alloys with yttrium and gadolinium were carried out at 1,523 ~ 1,723 K and 1,573 ~ 1,773 K, respectively. Solubilities of yttrium and carbon in liquid copper in the presence of C-YC2 and those of gadolinium and carbon in liquid copper in the presence of C-GdC2 were determined: Yttrium solubility in liquid copper under C-YC2 equilibrium was obtained as log(CY / mass%) = 0.395 + 2.92 × 10-4T (1,523 ~ 1,723 K) Gadolinium solubility in liquid copper under C-GdC2 equilibrium was obtained as log(CGd / mass%) = 0.684 + 2.64 × 10-4T (1,573 ~ 1,773 K) Based on the results of yttrium and gadolinium solubilities, activity coefficients of yttrium and gadolinium in liquid copper were calculated: logγY = (- 2.07 - 2.69 × 103 / T)(1 - NY)2 (1,523 ~ 1,723 K) logγGd = (- 1.56 - 3.82 × 103 / T)(1 - NGd)2 (1,573 ~ 1,773 K)
社団法人資源・素材学会の論文
2000-10-25