SiC Ceramic Particles Coated Tungsten Methods

The present invention provides a surface coating of SiC particles of tungsten methods. Specific steps are as follows:

1)Put the concentration of SiC particles into 70% nitric acid, and ultrasonic vibration to its roughened, removed after 5 minutes and rinsed with deionized water to obtain a clean and rough surface of SiC particles having;

2) The following ingredients and method of preparation of sol: Take 0.5-1 grams per 2.5-5 ml of tungsten powder and hydrogen peroxide reaction, the reaction after adding 2 ml of anhydrous ethanol and 0.75 ml of acetic acid mixed, filtered the reaction residue to give a pale yellow sol; sol to the amount formulated to meet the needs of the next step is completely submerged SiC ceramic particles;

3) The roughened treated SiC ceramic particles immersed in said sol, supplemented sonication for 10-20 minutes, so that a uniform dispersion of SiC particles in the sol;

4) SiC ceramic particles after the above process is placed in the 300-350 ℃ drying oven for 2-3 hours, then cool;

5) The above reducing the dried particles of SiC under a hydrogen atmosphere at 760-800 ℃ 2-3 hours, removed after the furnace with cooling to obtain a SiC ceramic coated tungsten particles.

The present invention is simple to operate, low cost, can be applied to not only SiC, Al2O3 ceramic and graphite particles, but also to the surface of any shape made ​​of these materials plated tungsten ceramic processing device.


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