statistical moment method
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2021 ◽  
Vol 66 (3) ◽  
pp. 69-80
Author(s):  
Hoc Nguyen Quang ◽  
Hien Nguyen Duc

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.


Author(s):  
Nguyen Quang Hoc ◽  
Vu Quoc Trung ◽  
Nguyen Duc Hien ◽  
Nguyen Minh Hoa

In this study, the mean nearest neighbor distance between two atoms, the Helmholtz free energy and characteristic quantities for elastic deformation such as elastic moduli E, G, K and elastic constants C11, C12, C44 for binary interstitial alloys with FCC structure under pressure are derived with the statistical moment method. The numerical calculations for interstitial alloy AGC were performed by combining the Mie-Lennard-Jones potential and the Morse potential. Our calculated results were compared with other calculations and the experimental data.


2021 ◽  
Vol 18 (4) ◽  
pp. 1153-1161
Author(s):  
Malika Madani ◽  
Adda Missoum ◽  
Bachir Ouari ◽  
Sergey Titov

A consistent study of the consequence of the azimuthal angle φ on the susceptibility and the hysteresis of the nanoparticles is performed, we treat the problem with Brown’s magnetic equation thereby extending the statistical moment method. The (DMH) loops are obtained, the principal-axis of the magnetization is oriented to the direction of the field under an any azimuthal angle. It’s demonstrated that the hysteresis and the nonlinear ac susceptibility powerfully depend on the Azimuthal angle φ.


2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Nguyen Quang Hoc ◽  
Bui Duc Tinh ◽  
Nguyen Duc Hien ◽  
Gelu Coman

In this work, we build the model and derive the theory of nonlinear deformation for substitutional alloy AB with interstitial atom C and face-centered cubic structure under pressure from the statistical moment method. The calculation results for FCC-AuCuSi are presented. We obtain the values of density of deformation energy, maximum real stress, limit of elastic deformation, and the stress-strain curve and compare the calculated results with experiments and other calculations.


2021 ◽  
Vol 66 (1) ◽  
pp. 30-41
Author(s):  
Hoc Nguyen Quang ◽  
Hien Nguyen Duc ◽  
Le Nguyen Ngoc ◽  
Linh Vu Thuy ◽  
Trang Pham Huyen ◽  
...  

The paper derives analytic expressions of the diffusion coefficient depending on strain and pressure for the interstitial alloy AB with FCC structure by the statistical moment method based on previous studies for metals and semiconductors. Theoretical results are applied to alloy AuSi. Our numerical results satisfy the Arrhenius law


2020 ◽  
Vol 65 (10) ◽  
pp. 18-23
Author(s):  
Hoc Nguyen Quang ◽  
Loan Pham Thi Thanh ◽  
Viet Nguyen Tuan ◽  
Le Nguyen Ngoc

We build the theory of diffusion for FCC binary interstitial alloy under pressure based on the statistical moment method, where there are the analytic expressions of the jumping frequency of interstitial atom, the effective jumping length, the correlation factor, the diffusion coefficient, and the activated energy. In limit cases, we can obtain the diffusion theory for FCC metal A under pressure.


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