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Abstract: This work firstly presents detailed evidence of the fcc-type miscibility gap in the Cu–Ni–V system at temperatures between 1000°C and 1100°C. The phase equilibria, phase transformation behavior and microhardness of the (Cu0.5Ni0.5)100−xVx (at.%) (x=2, 4, 6, 8, 10, 12) alloys have been investigated by electron probe microanalysis, X-ray diffraction, differential scanning calorimetry and Vickers hardness tester, confirming that the fcc-type miscibility gap exists in the Cu–Ni–V system at temperatures between 1000°C and 1100°C. The obtained results will not only help to well understand the strengthening mechanisms in the Cu–Ni–V alloys at high temperatures, but also to effectively develop new high-temperature spinodal-hardened Cu–Ni–V base alloys in the future. [ABSTRACT FROM AUTHOR]

Abstract: The phase equilibria in the Co–W–V ternary system were experimentally investigated by optical microscopy (OM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD) on the equilibrated alloys. Three isothermal sections of the Co–W–V ternary system at 1100°C, 1200°C and 1300°C were determined, and no ternary compound was found in this system. In addition, a novel phenomena induced by the liquid phase separation in the Co–W–V alloys was firstly discovered, suggesting that a stable liquid miscibility gap exists in the Co–W–V ternary system. The newly determined phase equilibria and firstly discovered phase separation phenomena in the Co–W–V system will provide important information for the development of Co–W based alloys. [Copyright &y& Elsevier]