Calculation of the binary chromiun-lanthanide phase diagrams |
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| Authors: | S Ray and J P Neumann |
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| Affiliation: | (1) Department of Metallurgical Engineering University of Koorkee, 247667, Boorkee, India;(2) Materials Department University of Wisconsin-Milwaukee, 53201 Milwaukee, WI, USA |
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| Abstract: | The Miedema model is used to calculate the interaction parameter Ω for binary chromium-lanthanide metal systems in the liquid
state. The values of Ω found for the 15 systems range from +21.6 kJ/mol for Cr-Lu to +174.6 kJ/mol for Cr-Eu. The phase diagrams
of the 15 systems are calculated using these values and assuming complete immiscibility for the solid state and regular solution
behavior for the liquid state. Because of the positive values of Ω, most phase diagrams exhibit a liquid miscibility gap;
only the Cr-Er, Cr-Tm, and Cr-Lu systems do not contain a miscibility gap. A comparison is made between the calculated and
the experimentally determined Cr-Ce phase diagram. |
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