THERMODYNAMIC PROPERTY OF ALLOY FCC-AuCuLi AT ZERO PRESSURE

2021 ◽  
Vol 66 (3) ◽  
pp. 69-80
Author(s):  
Hoc Nguyen Quang ◽  
Hien Nguyen Duc
Keyword(s):  
Thermodynamic Properties ◽  
Thermodynamic Property ◽  
Moment Method ◽  
Thermodynamic Theory ◽  
Statistical Moment ◽  
Experimental Results ◽  
Thermodynamic Quantities ◽  
The Future ◽  
Statistical Moment Method

We briefly present the thermodynamic theory of FCC ternary substitutional and interstitial alloy at zero pressure derived by the statistical moment method and apply this theory to alloy AuCuLi. The thermodynamic properties of Au, AuCu and AuLi are specific cases for that of AuCuLi. We compare the thermodynamic properties of alloys AuCuSi and AuCuLi. Our calculated results of thermodynamic quantities for AuCuLi predict and orient experimental results in the future.

Application of Statistical Moment Method to Thermodynamic Properties and Phase Transformations of Metals and Alloys

2008 ◽  
Vol 138 ◽  
pp. 209-240 ◽  
Author(s):  
K. Masuda-Jindo ◽  
Vu Van Hung ◽  
P.E.A. Turchi
Keyword(s):  
Thermodynamic Properties ◽  
Phase Transformations ◽  
Moment Method ◽  
Structural Phase ◽  
Equilibrium Phase ◽  
Statistical Moment ◽  
Metals And Alloys ◽  
Thermodynamic Quantities ◽  
Specific Heats ◽  
Statistical Moment Method

The thermodynamic properties and phase transformations of metals and alloys are studied using the statistical moment method, going beyond the quasi-harmonic approximations. Including the power moments of the atomic displacements up to the fourth order, the Helmholtz free energies and the related thermodynamic quantities are derived explicitly in closed analytic forms. The thermodynamic quantities, like thermal lattice expansion coefficients, specific heats, Grüneisen constants, elastic constants calculated by using the SMM are compared with those of other theoretical schemes and the experimental results. The hcp-bcc structural phase transformations observed for IVB elements, Ti, Zr and Hf, are discussed in terms of the anharmonicity of thermal lattice vibrations. The equilibrium phase diagrams are calculated for the refractory Ta-W and Mo-Ta bcc alloys. In addition, the temperature dependence of the elastic moduli C11, C12 and C14 and those of the ideal tensile and shear strengths of the bcc elements Mo, Ta and W are studied: We also discuss the melting transitions of metals and alloys within the framework of the SMM and estimate the melting temperatures through the limiting temperature of the crystalline stability.

scholarly journals Investigation of Thermodynamic Properties of Metal Thin Film by Statistical Moment Method

2013 ◽  
Vol 23 (4) ◽  
pp. 301
Author(s):  
Vu Van Hung ◽  
Duong Dai Phuong ◽  
Nguyen Thi Hoa
Keyword(s):  
Thin Film ◽  
Thermodynamic Properties ◽  
Moment Method ◽  
Linear Thermal Expansion ◽  
Statistical Moment ◽  
Thermodynamic Quantities ◽  
Face Centered Cubic ◽  
Specific Heats ◽  
Metal Thin Film ◽  
Statistical Moment Method

The thermodynamic properties of the metal thin film with face-centered cubic structure at zero pressure are investigated using the statistical moment method \((SMM)\), including the anharmonicity effects of thermal lattice vibrations. The Helmholtz free energy, linear thermal expansion coefficients, specific heats at the constant volume and those at the constant pressure, \(C_V\) and \(C_p\) are derived in closed analytic forms in terms of the power moments of the atomic displacements. Numerical calculations for thermodynamic quantities of Al, Au and Ag thin films are found to be in good agreement with those of the other theoretical results and experimental data.

scholarly journals Study of Melting Temperature of Metals: Pressure Dependence

2011 ◽  
Vol 21 (1) ◽  
pp. 77 ◽  
Author(s):  
Vu Van Hung ◽  
Hoang Van Tich ◽  
Dang Thanh Hai
Keyword(s):  
Melting Temperature ◽  
Pressure Dependence ◽  
Moment Method ◽  
Statistical Moment ◽  
Experimental Results ◽  
Melting Temperatures ◽  
Statistical Moment Method

The melting temperature of metals are studied using the statistical moment method, going the quasi-harmonic appromations. The melting temperature of metals are calculated as a function of the pressure. We discuss the pressure dependence of melting temperatures of Ce, Fe metals and compare the present results with those of the experimental results.

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