A thermodynamic study on the AgSbSn system

The distribution of Ag, Co, Ni, Zn, Sn, Pb, As, Sb and Bi between calcium ferrite slag and liquid copper was measured at 1523 K under controlled CO-CO2 atmospheres. The distribution ratios, defined by %X in slag/%X in metal, were plotted against the oxygen potential and compared with those obtained for silicate slag. From the slopes of such plots, reasonable oxide forms dissolved in slag, XOν, were estimated. The increasing content of CaO in ferrite slag results in increase in the distribution ratio for As or Sb, but in decrease in the ratio for Pb. The effects of the composition change in the alloy phase and the temperature dependence on the distribution ratios were evaluated thermodynamically. It was proved that a mono-nuclear atom base expression is reasonable to express the oxide form dissolved in slag, such as CuO0.5, AsO1.5 etc. Moreover, from the iron contents in a Cu-X alloy, the interaction parameters between Fe and X in liquid copper were derived.

Distribution equilibria of minor elements between liquid copper and calcium ferrite slag

In the present reevaluation of the Cu-Zn system, the ordering in the β phase is described using a two sublattice model, whereas four sublattices are used to model theγ phase. A self-consistent set of coefficients has been obtained, allowing both the equilibrium phase diagram and the thermodynamic properties to be calculated in close agreement with experimental observations.

Thermodynamic reevaluation of the Cu-Zn system

The integral enthalpy of formation hf of Cu-In liquid alloys has been measured by direct reaction calorimetry for 0 < xIn < 1 and 903 < T (K) < 1348. The excess heat capacity CEP which has been deduced is temperature independent. The hf minimum and the CEP maximum, at xIn ⋍ 0.25, are interpreted in terms of a local order in the melts. The integral enthalpy of formation of the β, γ and η solid phases has also been measured by dissolution calorimetry at 904 and 941 K. The entropy of melting of the γ phase has been determined. It is pointed out that many systems do not have zero excess heat capacity; thus the mean values of hf as calculated from measurements at different temperatures are incorrect.

Étude thermodynamique du système binaire cuivre-indium I. Étude calorimétrique

The Cu−In (Copper-Indium) system

https://www.jstage.jst.go.jp/article/jinstmet1952/39/11/39_11_1175/_pdf

阿座上竹四

Papers

溶融Sb-Ag, Sb-Au 2元系合金の活量

溶融銅-ヒ素, 銅-インジウム系合金の活量について

溶融銅-亜鉛, 銅-カドミウム系合金の活量について

溶融銅-ビスマス, 銅アンチモン系合金の活量について

溶融銅-鉛および銅-タリウム系合金の活量について

阿座上 竹四