Yifang Ouyang , Meiling Xiong , Kuixin Lin , Yulu Zhou , Hongmei Chen , Xiaoma Tao , Qing Peng , Yong Du
{"title":"用 MEAM 电位分析碳空位对 ZrC 性能的影响","authors":"Yifang Ouyang , Meiling Xiong , Kuixin Lin , Yulu Zhou , Hongmei Chen , Xiaoma Tao , Qing Peng , Yong Du","doi":"10.1016/j.calphad.2024.102680","DOIUrl":null,"url":null,"abstract":"<div><p>A novel second-nearest-neighbor (2NN) modified embedded atom method (MEAM) potential for Zr–C system has been developed. The lattice constants, formation enthalpy, mechanical properties of stoichiometric ZrC have been reproduced. The melting point from the new 2NN-MEAM potential is 3436 K, which is coincident with the experimental melting point, ∼3530 K. The properties of sub-stoichiometric ZrC<sub><em>x</em></sub> with ordered or disordered carbon vacancy have also been examined with the new potential. The results for ordered sub-stoichiometric ZrC<sub><em>x</em></sub> agree well with the experimental data and/or first-principles calculations. The lattice parameter, elastic properties, thermodynamic properties change with the C/Zr ratio have been studied. The predicted relationships between the properties versus C/Zr ratio coincide with available experimental results. These results indicate the present 2NN-MEAM potential is suitable for atomic scale simulation of ZrC.</p></div>","PeriodicalId":9436,"journal":{"name":"Calphad-computer Coupling of Phase Diagrams and Thermochemistry","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The effect of carbon vacancy on the properties of ZrC by MEAM potentials\",\"authors\":\"Yifang Ouyang , Meiling Xiong , Kuixin Lin , Yulu Zhou , Hongmei Chen , Xiaoma Tao , Qing Peng , Yong Du\",\"doi\":\"10.1016/j.calphad.2024.102680\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A novel second-nearest-neighbor (2NN) modified embedded atom method (MEAM) potential for Zr–C system has been developed. The lattice constants, formation enthalpy, mechanical properties of stoichiometric ZrC have been reproduced. The melting point from the new 2NN-MEAM potential is 3436 K, which is coincident with the experimental melting point, ∼3530 K. The properties of sub-stoichiometric ZrC<sub><em>x</em></sub> with ordered or disordered carbon vacancy have also been examined with the new potential. The results for ordered sub-stoichiometric ZrC<sub><em>x</em></sub> agree well with the experimental data and/or first-principles calculations. The lattice parameter, elastic properties, thermodynamic properties change with the C/Zr ratio have been studied. The predicted relationships between the properties versus C/Zr ratio coincide with available experimental results. These results indicate the present 2NN-MEAM potential is suitable for atomic scale simulation of ZrC.</p></div>\",\"PeriodicalId\":9436,\"journal\":{\"name\":\"Calphad-computer Coupling of Phase Diagrams and Thermochemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-03-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Calphad-computer Coupling of Phase Diagrams and Thermochemistry\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0364591624000221\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Calphad-computer Coupling of Phase Diagrams and Thermochemistry","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0364591624000221","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
The effect of carbon vacancy on the properties of ZrC by MEAM potentials
A novel second-nearest-neighbor (2NN) modified embedded atom method (MEAM) potential for Zr–C system has been developed. The lattice constants, formation enthalpy, mechanical properties of stoichiometric ZrC have been reproduced. The melting point from the new 2NN-MEAM potential is 3436 K, which is coincident with the experimental melting point, ∼3530 K. The properties of sub-stoichiometric ZrCx with ordered or disordered carbon vacancy have also been examined with the new potential. The results for ordered sub-stoichiometric ZrCx agree well with the experimental data and/or first-principles calculations. The lattice parameter, elastic properties, thermodynamic properties change with the C/Zr ratio have been studied. The predicted relationships between the properties versus C/Zr ratio coincide with available experimental results. These results indicate the present 2NN-MEAM potential is suitable for atomic scale simulation of ZrC.
期刊介绍：
The design of industrial processes requires reliable thermodynamic data. CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) aims to promote computational thermodynamics through development of models to represent thermodynamic properties for various phases which permit prediction of properties of multicomponent systems from those of binary and ternary subsystems, critical assessment of data and their incorporation into self-consistent databases, development of software to optimize and derive thermodynamic parameters and the development and use of databanks for calculations to improve understanding of various industrial and technological processes. This work is disseminated through the CALPHAD journal and its annual conference.
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