碳化钨粉末表面涂层改性金刚石粉末的涂层工艺及机理  

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

作　　者：许左琳 黄传真 刘含莲[1] 刘盾 XU Zuolin;HUANG Chuanzhen;LIU Huanlian;LIU Dun(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;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004)

机构地区：[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

出　　处：《中国机械工程》2024年第2期208-214,共7页China Mechanical Engineering

基　　金：国家自然科学基金(52275464)。

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。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.

关 键 词：粉末表面改性 电泳沉积 核壳结构 结合强度 

分 类 号：TG135.5[一般工业技术—材料科学与工程] TQ164[金属学及工艺—合金]