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Phase-Field Modeling of Free Dendritic Growth in binary alloy under Forced Flow

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Journal of Shanghai Jiaotong university(Science) 2011年第3期16卷 356-359页

作者：肖荣振王智平朱昌盛冯力李文生 State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials Lanzhou University of Technology

A phase-field model(PFM)coupling with phase field,flow field and diffuse equation is presented for simulating isothermal dendrite growth of a nickel-copper alloy under a forced *** on the finite difference method with uniform grid,the C programming code is implemented to complete the phase-field *** simulation results indicate that the interfacial morphology,the symmetry of dendrite formation,the tip growth velocity and the concentration distribution are strongly influenced by the fluid flow.

关键词： phase-field model(PFM) binary alloy convection dendritic growth

Enthalpies of Formation of Noble Metal binary alloys Bearing Rh or Ir

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Journal of Materials Science & Technology 2003年第3期19卷 243-246页

作者： YifangOUYANG HongmeiCHEN XiapingZHONG DepartmentofPhysics GuangxiUniversityNanning530004China InternationalCentreforMaterialsPhysics ChineseAcademyofSciencesShengyang110016China GuilinInstituteofTechnology Guilin541004China

The modified embedded atom method proposed by authors has been applied to calculating the enthalpies of formation of random alloys and the ordered intermetallic compounds for noble metal binary systems bearing Rh or Ir. The present results are in good agreement with those of Miedema theory, available experiments and the first-principles quantum mechanics calculations. The present results indicate that Cu-Rh, Cu-lr, Ag-Rh, Ag-lr, Au-Rh, Au-lr, Pd-Rh and Pd-lr systems are repulsive, however, IMi-Rh, Ni-lr, Pt-lr, Pt-Rh and Rh-lr systems form solid solutions and Ni-Rh, Ni-lr and Pt-Rh show ordering tendency.

关键词： Modified embedded atom method Enthalpy of formation binary alloy

A New Thermodynamic Calculation Method for binary alloys: Part I: Statistical Calculation of Excess Functions

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Journal of Materials Science & Technology 2002年第3期18卷 237-241页

作者： XingqiuCHEN P.Rogl 等 SchoolofMaterialsandMetallurgy NortheasternUniversityShenyang110004China InstitutfuerPhysikalischeChemie UniversitaetWienWahringerstrαβe42A-1090WienAusria

The improved form of the calculation formula for the activities of the components in binary liquid and solid alloys has been derived based on the free volume theory considering excess entropy and Miedema's model for calculating the formation heat of binary alloys. A calculation method of excess thermodynamic functions for binary alloys has been established, and the formulas of integral molar excess properties and partial molar excess properties for solid ordered or disordered binary alloys have been developed. The calculated results are in good agreement with the experimental values. Ag-Pb, Fe-Mn, Ag-Au and Co-Pt are taken for example in the research and analysis.

关键词： binary alloy Thermodynamic Excess functions Enthalpy

CORRELATION BETWEEN CONSTITUENT AND SPUTTERING RATE OF binary alloyS IN GLOW DISCHARGE LAMP

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Acta Metallurgica Sinica(English Letters) 1992年第12期5卷 462-466页

作者： REN Jianshi ZHANG Gongshu Institute of Metal Research,Academia Sinica.Shenyang,China WANG Zhenshu LIU Gen LIU Shenglin Shanghai University of Technology,Shengyang,China Inst of Metal Research Acad Sinica Shenyang China

Investigation was made of the sputtering rate in glow discharge lamp with relaion to constituent of 25 different specimens of 6 binary ***,Cr-Fe,Bi-Sb,Cu-Zn, Ag-Cu,Al-Zn and *** measuring mass loss sfter each sputtering under constant Ar pressure and voltage *** *** general,between sputtering rate and concentration of constituent of these non-intermetallic binary alloys obeys the hyperbolic law under steady state,that may be approximately regarded as linear correlation only on certain special condition if the two components of the alloys with similar sputte ringrates.

关键词： eathode sputtering glow discharge binary alloy sputtering rate

Description and Prediction of the Solid Solubilities of binary alloys Based on the Actinide Metals

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Rare Metals 1993年第1期12卷 9-15页

作者：张邦维廖树帜 CCAST (Word Laboratory) P. O. Box 8370 Beijing China 100080. Department of Physics Hunan University Changsha P.R.China 410082 Department of Physics Hunan University Changsha P.R.China 410082

The solid solubilities of 207 binary alloys based on the three actinide metals (Th, U and Pu) at room tem- perature are studied with the two theoretical schemes suggested by one of the present authors (ZBW).The re- sults show that the soluble elements can be distinguished from the insoluble ones by a parabola y_1=a--bx^2 or an ellipse (x_2,-m)~2/c^2+(y_2-n)~2/d^2=l with the total reliabilities of 87.9% and 92.3% respectively for the 207 binary alloys. The contants a and b in the parabola equation, and c, d, m and n in the ellipse equation can be related to some appropriate parameters for each host metal respectively. The reasons are discussed. From the theories the soluble elements in these actinide host metals that have not been measured yet can be predicted in the accuracies of the schemes.

关键词： binary alloy Actinide metals Solid solubility

EAM Analysis of the Lattice Parameter Effect in Order-Disorder Transformation

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Journal of University of Science and Technology Beijing 2001年第3期8卷 189-194页

作者： Timoth■e Nsongo, Xiaodong Ni, Guoliang Chen State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China Faculty of Science, Physics Department, P. O. Box 69, Brazzaville (CONGO) Applied Scie State Key Lab. for Adv. Met. Mat. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The embedded atom method (EAM) was used to theoretically analyze the effect of the lattice parameter variation on the order-disorder transformation in binary alloys. Based on EAM, it is found that only one kind of order-disorder transition (second-order transition) exists for AB alloy. Three groups of order-disorder transformation can be observed for the A(3)B or AB(3) compounds. For group I, the order-disorder is a completely first-order transition. For group II, the order-disorder transformation is a classical first-order transition. For group III, the order-disorder transformation is found to be a second-order transition. The lattice parameter variations have a significant effect on E-2 coefficient, which is related to the ordering energy. These results are in good agreement with experiments.

关键词： order-disorder transformation embedded atom method (EAM) phase transformation binary alloy

Statistical Mechanics Model of Liquid binary Ailoy

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Rare Metals 1994年第4期13卷 251-257页

作者：樊成才王俭钱嘉裕

From the view of chemical short range order and uncomplete random mixing existing in liquid binary al-loy, absorbing the rational part of past statistical mechanics model. a statistical mechanics model of liquidbinary... 详细信息

关键词： Statistical mechanics binary alloy

Improved Prediction and Understanding of Glass-Forming Ability Based on Random Forest Algorithm

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Journal of Quantum Computing 2021年第2期3卷 79-87页

作者： Chenjing Su Xiaoyu Li Mengru Li Qinsheng Zhu Hao Fu Shan Yang School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengduChina School of Physics University of Electronic Science and Technology of ChinaChengdu610054China Department of Chemistry Physicsand Atmospheric SciencesJackson State UniversityJacksonUSA

As an ideal material,bulk metallic glass(MG)has a wide range of applications because of its unique properties such as structural,functional and biomedical ***,it is difficult to predict the glass-forming ability(GFA)even given the criteria in theory and this problem greatly limits the application of bulk MG in industrial *** this work,the proposed model uses the random forest classification method which is one of machine learning methods to solve the GFA prediction for binary metallic *** with the previous SVM algorithm models of all features combinations,this new model is successfully constructed based on the random forest classification method with a new combination of features and it obtains better prediction ***,it further shows the degree of feature parameters influence on ***,a normalized evaluation indicator of binary alloy for machine learning model performance is put forward for the first *** result shows that the application of machine learning in MGs is valuable.

关键词： GFA random forest binary alloy machine learning