Heat contents of the intermetallics V3Ge and V5Ge3 and thermodynamic modeling of the Ge–V system
作者： Xiaoming Yuan , Weihua Sun , Yoonsung Chung , Honghui Xu , Shuhong Liu
DOI: 10.1016/J.TCA.2010.11.018
关键词:
摘要: Abstract Fourteen alloys were prepared by arc-melting the pure elements and annealing at 850 °C for 30 days. The annealed examined X–ray diffraction (XRD), scanning electron microscope with energy dispersive X-ray analysis (SEM/EDX), differential calorimetry (DSC) drop calorimeter. major experimental results are as follows. (I) heat contents of V 3 Ge 5 measured calorimeter from 400 to 900 °C. (II) microstructure as-cast alloy 87.1 12.9 indicates that eutectic composition liquid ↔ (V) + V is above 12.9 at.% Ge, 2.9 97.1 shows liquid ↔ V 17 31 + Ge close 97.1 at.% Ge. (III) invariant reaction temperatures liquid + V 11 8 ↔ V 960.0 ± 2 °C 930.7 ± 2 °C, respectively. Based on in this study literature, Ge–V system was modeled CALPHAD approach.
elsevier.com
sci-hub.se 参考文章(13)
Donna Sue Plickert, Nikki D. Wheaton, Kathleen Mills, Hugh Baker, Alloy phase diagrams ASM International. ,(1992)
Rongxiang Hu, Philip Nash, Qing Chen, Lijun Zhang, Yong Du, Heat capacities of several Al–Ni–Ti compounds Thermochimica Acta. ,vol. 486, pp. 57- 65 ,(2009) , 10.1016/J.TCA.2008.12.027
A.T. Dinsdale, SGTE data for pure elements Calphad-computer Coupling of Phase Diagrams and Thermochemistry. ,vol. 15, pp. 317- 425 ,(1991) , 10.1016/0364-5916(91)90030-N
C.P. Wang, A.Q. Zheng, X.J. Liu, Thermodynamic assessments of the V–Ge and V–Pt systems Intermetallics. ,vol. 16, pp. 544- 549 ,(2008) , 10.1016/J.INTERMET.2008.01.002
Sergei Zarembo, Robert J. Kematick, Clifford E. Myers, Thermodynamics of phase formation in the V–Ge system Journal of Alloys and Compounds. ,vol. 299, pp. 126- 136 ,(2000) , 10.1016/S0925-8388(99)00801-4
M. E. Straumanis, E. Z. Aka, Lattice Parameters, Coefficients of Thermal Expansion, and Atomic Weights of Purest Silicon and Germanium Journal of Applied Physics. ,vol. 23, pp. 330- 334 ,(1952) , 10.1063/1.1702202
Bo Sundman, Bo Jansson, Jan-Olof Andersson, The Thermo-Calc databank system Calphad. ,vol. 9, pp. 153- 190 ,(1985) , 10.1016/0364-5916(85)90021-5
R. Castanet, Limiting partial enthalpies of solution of 3d transition metals in liquid germanium Journal of the Less Common Metals. ,vol. 103, pp. L1- L3 ,(1984) , 10.1016/0022-5088(84)90380-1
Abeer Yassin, Marcel Gilbert, Robert Castanet, Enthalpies of formation of binary systems of Ti, V, Mo and Hf with Ge Journal of Alloys and Compounds. ,vol. 322, ,(2001) , 10.1016/S0925-8388(01)01267-1
H. Völlenkle, A. Wittmann, H. Nowotny, Untersuchungen an Germaniden der Übergangsmetalle V, Cr, Mo und Mn Monatshefte für Chemie und verwandte Teile anderer Wissenschaften. ,vol. 95, pp. 1544- 1549 ,(1964) , 10.1007/BF00901710