China Mechanical Engineering ›› 2024, Vol. 35 ›› Issue (02): 208-214.DOI: 10.3969/j.issn.1004-132X.2024.02.003

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Coating Technology and Mechanism of Modified Diamond Powder by Surface Coating of WC Powders

XU Zuolin1;HUANG Chuanzhen2;LIU Huanlian1;LIU Dun1   

  1. 1.School of Mechanical Engineering, Shandong University,Key Laboratory of High-efficiency 
    and Clean Mechanical Manufacture,Ministry of Education,Center for Advanced Jet Engineering 
    Technology(CaJET),Jinan,250061
    2.School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004

  • Online:2024-02-25 Published:2024-03-22

碳化钨粉末表面涂层改性金刚石粉末的涂层工艺及机理

许左琳1;黄传真2;刘含莲1;刘盾1   

  1. 1.山东大学机械工程学院,山东大学高效洁净机械制造教育部重点实验室,山东大学先进射流技术研究中心,济南,250061
    2.燕山大学机械工程学院,秦皇岛,066004

  • 通讯作者: 黄传真(通信作者),男,1966年生,教授,博士研究生导师。研究方向为高效精密加工技术、结构陶瓷材料、增材制造。发表论文400余篇。E-mail:huangchuanzhen@ysu.edu.cn。
  • 作者简介:许左琳,男,1998年生,硕士研究生。研究方向为粉末表面涂层技术。E-mail:653484420@qq.com。
  • 基金资助:
    国家自然科学基金(52275464)

Abstract: The powder surface coating technology might endow the powder with new physical and chemical properties. By electrophoretic deposition technology, diamond powder was modified on the surface coating of WC powders. The core-shell structure of diamond and the coating between diamond powder and WC powder were analyzed by different characterization methods. The influences of diamond powder content on coating effectiveness were studied, and the bonding strength among powders was compared under different coating processes. The results show that when the mass ratio of WC powder to diamond powder is as 6∶1, the coating effectiveness is the best. The strong bonding force among the modified powders comes from the chemisorption formed by covalent bonds such as COO-W and C-O-W and the physical adsorption formed by van der Waals force.

Key words:  , powder surface modification, electrophoretic deposition, core-shell structure, bond strength

摘要: 粉末表面涂层技术能赋予粉末新的物理化学性质,电泳沉积技术能在改性碳化钨(WC)粉末表面涂层改性金刚石粉末。通过不同表征手段分析了金刚石的核壳结构及金刚石粉末与WC粉末间的包覆情况,研究了金刚石粉末含量对涂层效果的影响,比较了不同包覆工艺下粉末间的结合强度。结果表明,WC粉末质量与金刚石粉末质量的比为6∶1时,涂层效果最佳,改性后粉末间的强结合力来自COO-W、C-O-W等共价键形成的化学吸附与范德华力形成的物理吸附。

关键词: 粉末表面改性, 电泳沉积, 核壳结构, 结合强度

CLC Number: