Ti粉粒径和原料配比对镀Ti金刚石粉性能的影响  

Effect of Ti powder particle sizes and raw material ratio on properties of Ti-coated diamond powder

作　　者：韩铭 赵安冬 李良 HAN Ming;ZHAO Andong;LI Liang(Henan Building Materials Research and Design Institute Co.,Ltd.,Zhengzhou 450002,China;School of Intelligent Manufacturing and Electrical Engineering,Nanyang Normal University,Nanyang 473061,Henan,China)

机构地区：[1]河南建筑材料研究设计院有限责任公司,郑州450002 [2]南阳师范学院智能制造和电气工程学院,河南南阳473061

出　　处：《金刚石与磨料磨具工程》2025年第1期46-55,共10页Diamond & Abrasives Engineering

基　　金：河南省科学院2022年科技开放合作项目“金刚石磨料镀覆技术研究”(220909003);南阳师范学院博士专项基金项目“MAX相结合超硬复合材料的制备及摩擦切削”(2019ZX018)。

摘　　要：为探索不同Ti粉粒径和原料配比对镀Ti金刚石粉性能的影响,通过对比不同Ti粉粒径,粗粉(60目,250μm)和细粉(325目,45μm),以及原料配比等因素,对金刚石粉表面的镀Ti效果进行研究。结果表明:镀Ti金刚石粉表面的化学成分为金刚石、Ti和TiC;细Ti粉Ar气氛保护下合成Ti包覆金刚石的质量增长大于粗Ti粉包覆金刚石和真空环境Ti包覆金刚石的。结合拉曼光谱、紫外吸收光谱和热分析结果,金刚石表面镀Ti的反应中,Ti粉粒径越细越有利于包覆层形成,且包覆层表面粗糙度越小;原料配比中Ti粉与金刚石质量比越大,包覆层越厚。Objectives:Titanium plating on the surface of diamond powder can improve its wettability to the bonding agent,and the preparation process of the titanium-plated metal layer is of great significance to the industrial application of diamond powder.The effect of particle size and raw material ratio of Ti powder on the properties of Ti coated diamond powder is analyzed.Methods:Different particle sizes(60 mesh coarse powder,~250μm and 325 mesh fine powder,~45μm)and raw material ratios are compared,and so are the vacuum and protective atmosphere titanium plating process.The experiments involve diamond particles,fine titanium powder,and titanium powder.The materials are immersed in hydrochloric acid and washed twice with acetone.Four ratios(5:3,2:1,1:1,1:2)are set based on the mass ratio of diamond and titanium powder.The materials are sintered under vacuum or Ar protective atmospheres,and the Ti powder slag and Ti-coated diamond particles are separated.Results:The chemical composition of titanium-coated diamond powders is characterized by XRD as diamond,Ti,and TiC transition layers.The morphology of titanium coated diamond powders and the distribution of elements on the surface are analyzed by SEM,which shows that Ti coating on the surface of diamond particles could be achieved with different ratios and Ti powder particle sizes.The Raman spectra of fine Ti-coated diamond contain characteristic peaks of diamond and Ti,while those of coarse Ti-coated diamond and Ti-coated diamond synthesized in a vacuum atmosphere are affected by the ratio of raw materials.The UVvisible absorption spectra show that there are obvious absorption peaks in the wavelength region of 228-234 nm and 328-350 nm for Ti-coated diamond,respectively.The weight loss rates of vacuum-synthesized titanium-coated diamond and fine-grained Ti-coated diamond are lower than those of coarse-grained Ti-coated diamond.Conclusions:Combined with the results of Raman spectra,ultraviolet absorption spectra,and thermal analyses,the performance of fine Ti-coated dia

关 键 词：磨料镀覆 金刚石粉 Ti粉 拉曼光谱 热分析 

分 类 号：TQ164[化学工程—高温制品工业] TG74[金属学及工艺—刀具与模具]