The preparation, structure, and performance of the diamond abrasive surface titanium plating layer

Diamond surface metalization can achieve a combination of diamond and many materials. Plating metal titanium on the surface of diamond is an important means to metallize diamond surface. Traditional physical and chemical gas sedimentation is difficult to cover granular diamond abrasives in large quantities. 

The method of heating diamond particles, titanium pine chloride, and titanium hydrogenation powder in a vacuum environment to form a uniform titanium plating (titanium carbide) layer on the surface of diamond. The test shows that this method is produced in a large number of diamond abrasives in each diamond granules, which are specially produced in each diamond particles. 

Through thermodynamic analysis, the relationship between the dioxide titanium chloride balancing steam pressure, the decomposition temperature of the hydrogenated titanium, and the carbonized titanium titanium layer of the reaction system form the relationship between temperature and environmental temperature and pressure (vacuum). The results show that: in the vacuum evaporative plating temperature range (923 ~ 1073K), the saturated vapor pressure of TICL_3 (s) is far higher than the pressure (1 ~ 10Pa) of the react room, which can ensure that TICL_3 participates in the reaction in the form of gas; The above reaction is performed in positive direction, that is, a titanium -carbide coating can be formed in the process of vacuum micro -evaporating plating, obtaining the ideal coating structure. 

According to the relationship between the thickness of the plating and the coating temperature and time, the activation energy formed by titanium carbide is 94 ± 7kj / mol. Through analysis methods such as AFM, SEM, and TEM, the structural characteristics of titanium plating (titanium titanium) layers were studied; the X -ray diffraction analysis was analyzed by 973 ～ 1123 k range of titanium plated migrants and the changes in the phase of the martial arts and carbonized consolidation constants The law of change. It was found that as the coating temperature increased, the content of titanium carbide in the plating layer increased, the average C / TI atom ratio of titanium carbide increased, and gradually approached the chemical measurement. Use X-ray small corners to analyze the law of phase changes at the depth layer of the coating. The coating of the C / TI atom generated by the TIC generated by the plating layer gradually decreases, forming a structure of diamond-TIC-TI.  The intensity and thermal stability of diamond stones before and after vacuum evaporative titanium plating are measured. 

As a result, after the titanium plating of diamonds at 973 ~ 1023K, its compressive load has increased to different degrees. Increase, the increase in compression load decreases. Due to the protective effect of plating, the thermal stability of titanium plating is increased, and the starting oxidation temperature in the air is 1230K, which is significantly higher than that of the uncoat diamond. The results of the application of the titanium pneumite tool industry show that titanium plating reduces the diamonds that have fallen off on the working surface of the diamond sawing tablet, and the intact and micro -broken shape increases; the exposure of diamond particles increases height; the existence of diamonds increases the intensity; the life of the tool increases.