• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2024, Vol. 60 ›› Issue (4): 296-304.doi: 10.3901/JME.2024.04.296

• 材料科学与工程 • 上一篇    下一篇

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基于第一性原理的镍/碳化钨复合钎涂层界面分析

王星星1,2, 吴港1, 何鹏2, 杨晓红3   

  1. 1. 华北水利水电大学河南省高效特种绿色焊接国际联合实验室 郑州 450045;
    2. 哈尔滨工业大学先进焊接与连接国家重点实验室 哈尔滨 150001;
    3. 金华职业技术学院院士专家工作站 金华 321017
  • 收稿日期:2023-05-08 修回日期:2023-12-10 发布日期:2024-05-25
  • 作者简介:王星星,男,1984年出生,工学博士,副教授,博士研究生导师。主要从事先进连接与智能制造、新材料及异种材料连接、钎焊过程高通量计算方面的研究。E-mail:wangxingxing@ncwu.edu.cn
  • 基金资助:
    国家自然科学基金(52071165,51705151); 河南省高层次人才特殊支持“中原英才计划-中原青年拔尖人才”; 河南省高校科技创新人才(22HASTIT026); 河南省优秀青年科学基金(202300410268); 先进焊接与连接国家重点实验室开放课题(AWJ-21M11); 龙门实验室开放课题(LMQYTSKT016)资助项目

First-principles Calculations on Interface Behavior of Ni/WC Composite Brazed Coatings

WANG Xingxing1,2, WU Gang1, HE Peng2, YANG Xiaohong3   

  1. 1. Henan International Joint Laboratory of High-efficiency Special Green Welding, North China University of Water Resources and Electric Power, Zhengzhou 450045;
    2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001;
    3. Academician Expert Workstation, Jinhua Polytechnic, Jinhua 321017
  • Received:2023-05-08 Revised:2023-12-10 Published:2024-05-25

摘要: 镍/碳化钨复合涂层具有高硬度、高耐磨性、低摩擦因数等优点,已在农业机械、磨料磨具、新能源领域广泛应用。为此,采用第一性原理密度泛函理论研究工程机械用镍/碳化钨复合钎涂层Ni (111)/WC (0001)界面和Ni (111)/W2C (0001)界面行为,讨论碳化钨增强镍基复合钎涂层中W2C相对耐磨涂层性能的影响规律。第一性原理计算结果表明,选取5层Ni (111)表面、9层WC (0001)表面和9层W2C (0001)表面代替块体特征,在6种堆叠方式中,Ni (111)/WC (0001)界面C终端B位置堆叠黏附功最高为7.42 J/m2,即界面结合强度最高;系统分析不同界面电子结构发现,镍原子更倾向与碳原子结合成键,Ni-C之间主要为离子键特性,界面镍原子金属键性质比非界面镍原子大幅减弱,复合涂层界面应严格控制W2C相生成。可为高耐磨高硬高强复合涂层的制造生产提供理论依据。

关键词: 镍/碳化钨涂层, 钎焊, 界面行为, 第一性原理, 界面黏附功

Abstract: Ni/WC composite coating has been widely used in agricultural machinery, mould processing and new energy resources fields for its high hardness, high wear resistance and low friction coefficient. The first-principles calculation is used to study the Ni(111)/WC(0001) interface and Ni(111)/W2C(0001) interface behavior in Ni/WC composite brazed coating of construction machinery. The influence of W2C on the wear resistance of WC-reinforced Ni matrix composite brazed coatings is discussed. The calculation results reveal that the 5 atom-layers Ni(111) surface, 9 atom-layers WC(0001) surface and 9 atom-layers W2C(0001)surface are selected to represent the block characteristics. Among the six stacking sequences, the highest Wad(adhesion work) is 7.42J/m2 at B site from C-terminated structure of Ni(111)/WC(0001) interface, then the interface bonding strength is the highest. The systematic analysis of the electronic structures at different interfaces shows that Ni atoms are more likely to bond with C atoms, the properties of bonds between Ni and C atoms are mainly ionic bonding, and the properties of metallic bonding between Ni atoms at the interface are much weaker than non-interface Ni atoms.W2C phase should be strictly controlled at the coating interface. The theoretical basis is provided for the manufacture of high wear resistance, high hardness and high strength composite coatings.

Key words: Ni/WC coating, brazing, interface behavior, first principle calculation, adhesion work

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