金刚石与磨料磨具工程2025，Vol.45Issue(1)：46-55,10.DOI:10.13394/j.cnki.jgszz.2023.0252
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
摘要
Abstract
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 dia-mond powder is analyzed.Methods:Different particle sizes(60 mesh coarse powder,～250 μm and 325 mesh fine powder,～45 μm)and raw material ratios are compared,and so are the vacuum and protective atmosphere titanium plat-ing 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 Ra-man 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 UV-visible 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 diamonds under argon atmosphere protection is better than that of coarse Ti powder-coated diamonds and vacuum atmo-sphere-coated diamonds.关键词
磨料镀覆/金刚石粉/Ti粉/拉曼光谱/热分析Key words
abrasive coating technology/diamond powder/Ti powder/Raman spectroscopy/thermal analysis分类
化学工程引用本文复制引用
韩铭,赵安冬,李良..Ti粉粒径和原料配比对镀Ti金刚石粉性能的影响[J].金刚石与磨料磨具工程,2025,45(1):46-55,10.基金项目
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) （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). （2019ZX018）
