Method for plating tungsten on diamond surface

Abstract

The invention relates to a method for plating tungsten on a diamond surface. In the invention, a salt-bath tungsten plating method is adopted. The method comprises the following steps of removing greasy dirt on the surface of a diamond particle, mixing with tungsten powder in a crucible after coarsening and carrying out sensitization-activation treatment; carrying out high-temperature salt-bath tungsten plating in a fused salt environment; and then cleaning and drying through a clear water boiling method to obtain an finished product, wherein the method for removing greasy dirt and coarsening is as follows: placing the diamond particle in diluted alkaline and carrying out ultrasonic oscillation cleaning, and cleaning by deionized water; soaking and cleaning by diluted acid; washing to neutral by water; adding into a nitric acid solution for boiling for 3-10 minutes, carrying out coarsening treatment and washing to neutral by deionized water, and carrying out sensitization-activation treatment; and cleaning by deoionized water and drying after cleaning by alcohol for acetone, wherein the salt-bath tungsten plating is carried out in a vacuum furnace. The method for plating tungsten on the diamond surface can be used for effectively plating a layer of compact and uniform coating on the surface of the diamond particle; the phase is mainly composed of WC (Wolfram Carbide) and W (Wolfram), so that toxic substances are not generated in the process. Moreover, the process is simple and the cost is low.

Description

Technical field

[0001] The invention involves a low -cost, pollution -free, tungsten method on the surface of diamond particles, which belongs to the field of coating technology and can be used in the preliminary treatment of diamond mill or other diamond products.

[0002] Background technique

[0003] Vajrayana is the hardest material in nature, which is very widely used. It is mostly used for cutting tools for crafts, metal products and other substances.Because diamond has high thermal guidance, low -expansion coefficients, high temperature resistance, corrosion resistance and other properties, it can also be used to prepare high -performance heat dissipation materials.

[0004] Vajrayana is stable, and the interface of metal or other materials is poor. Therefore, it is difficult to prepare high -quality composite materials for diamond particles and other materials.The existing technology is usually inlaid in metal or other organic materials. It is only fixed to fixed diamond ...

Examples

Embodiment 1

[0045] Weigh 1g of synthetic diamond powder (model MBD4, 120 / 140 mesh) with an analytical balance, first place the diamond particles in a 0.1mol / L NaOH solution, clean them with ultrasonic vibration for 0.5h, and wash them with deionized water until Neutral; then place the diamond particles in 0.1mol / L dilute hydrochloric acid and soak for 0.5h, take it out and wash it with deionized water until it is neutral; add an appropriate amount of 30% nitric acid solution and boil for 5min, carry out roughening treatment, and use Wash with deionized water until neutral; place the roughened diamond particles in a newly prepared colloidal palladium solution, stir rapidly for 5 minutes, and wash with deionized water until neutral; then use 10% dilute hydrochloric acid or 25g / L hypophosphorous acid Restore with sodium hydrogen solution, stir quickly for 3 minutes, then wash with deionized water until neutral; then wash with alcohol or acetone for 10 minutes; finally wash with deionized wate...

Embodiment 2

[0046] Embodiment 2: take by weighing 1g synthetic diamond powder (model is MBD4, 120 / 140 order) with analytical balance, at first diamond particle is placed in the KOH solution of 0.05mol / L, cleans 0.5h with ultrasonic vibration, after taking out, use Wash with deionized water until neutral; then soak the diamond particles in 0.1mol / L dilute hydrochloric acid for 0.5h, take it out and wash with deionized water until neutral; add an appropriate amount of 20% nitric acid solution and boil for 10min for roughening treatment, and washed with deionized water until neutral; the roughened diamond particles were placed in a newly configured colloidal palladium solution, stirred rapidly for 10 minutes, and washed with deionized water until neutral; then use 10% dilute hydrochloric acid or 30g / Restore with L of sodium hydrogen hypophosphite solution, stir rapidly for 3 minutes, then wash with deionized water until neutral; then wash with alcohol or acetone for 5 minutes; finally wash w...

Embodiment 3

[0047] Embodiment 3: take by weighing 1g synthetic diamond powder (model is MBD4, 120 / 140 order) with analytical balance, at first diamond particle is placed in the NaOH solution of 0.2mol / L, cleans 0.5h with ultrasonic vibration, after taking out, use Wash with deionized water until neutral; then soak the diamond particles in 0.1mol / L dilute hydrochloric acid for 0.5h, take it out and wash with deionized water until neutral; add an appropriate amount of 25% nitric acid solution and boil for 7min to coarsen treatment, and washed with deionized water until neutral; the roughened diamond particles were placed in the newly configured colloidal palladium solution, stirred rapidly for 4min, and washed with deionized water until neutral; then use 10% dilute hydrochloric acid or 20g / Restore with L of sodium hydrogen hypophosphite solution, stir rapidly for 3 minutes, then wash with deionized water until neutral; then wash with alcohol or acetone for 10 minutes; finally wash with deio...

Technical field

[0001] The invention involves a low -cost, pollution -free, tungsten method on the surface of diamond particles, which belongs to the field of coating technology and can be used in the preliminary treatment of diamond mill or other diamond products.

[0002] Background technique

[0003] Vajrayana is the hardest material in nature, which is very widely used. It is mostly used for cutting tools for crafts, metal products and other substances.Because diamond has high thermal guidance, low -expansion coefficients, high temperature resistance, corrosion resistance and other properties, it can also be used to prepare high -performance heat dissipation materials.

[0004] Vajrayana is stable, and the interface of metal or other materials is poor. Therefore, it is difficult to prepare high -quality composite materials for diamond particles and other materials.The existing technology is usually inlaid in metal or other organic materials. It is only fixed to fixed diamond ...

Examples

Embodiment 1

[0045] Weigh 1g of synthetic diamond powder (model MBD4, 120 / 140 mesh) with an analytical balance, first place the diamond particles in a 0.1mol / L NaOH solution, clean them with ultrasonic vibration for 0.5h, and wash them with deionized water until Neutral; then place the diamond particles in 0.1mol / L dilute hydrochloric acid and soak for 0.5h, take it out and wash it with deionized water until it is neutral; add an appropriate amount of 30% nitric acid solution and boil for 5min, carry out roughening treatment, and use Wash with deionized water until neutral; place the roughened diamond particles in a newly prepared colloidal palladium solution, stir rapidly for 5 minutes, and wash with deionized water until neutral; then use 10% dilute hydrochloric acid or 25g / L hypophosphorous acid Restore with sodium hydrogen solution, stir quickly for 3 minutes, then wash with deionized water until neutral; then wash with alcohol or acetone for 10 minutes; finally wash with deionized wate...

Embodiment 2

[0046] Embodiment 2: take by weighing 1g synthetic diamond powder (model is MBD4, 120 / 140 order) with analytical balance, at first diamond particle is placed in the KOH solution of 0.05mol / L, cleans 0.5h with ultrasonic vibration, after taking out, use Wash with deionized water until neutral; then soak the diamond particles in 0.1mol / L dilute hydrochloric acid for 0.5h, take it out and wash with deionized water until neutral; add an appropriate amount of 20% nitric acid solution and boil for 10min for roughening treatment, and washed with deionized water until neutral; the roughened diamond particles were placed in a newly configured colloidal palladium solution, stirred rapidly for 10 minutes, and washed with deionized water until neutral; then use 10% dilute hydrochloric acid or 30g / Restore with L of sodium hydrogen hypophosphite solution, stir rapidly for 3 minutes, then wash with deionized water until neutral; then wash with alcohol or acetone for 5 minutes; finally wash w...

Embodiment 3

[0047] Embodiment 3: take by weighing 1g synthetic diamond powder (model is MBD4, 120 / 140 order) with analytical balance, at first diamond particle is placed in the NaOH solution of 0.2mol / L, cleans 0.5h with ultrasonic vibration, after taking out, use Wash with deionized water until neutral; then soak the diamond particles in 0.1mol / L dilute hydrochloric acid for 0.5h, take it out and wash with deionized water until neutral; add an appropriate amount of 25% nitric acid solution and boil for 7min to coarsen treatment, and washed with deionized water until neutral; the roughened diamond particles were placed in the newly configured colloidal palladium solution, stirred rapidly for 4min, and washed with deionized water until neutral; then use 10% dilute hydrochloric acid or 20g / Restore with L of sodium hydrogen hypophosphite solution, stir rapidly for 3 minutes, then wash with deionized water until neutral; then wash with alcohol or acetone for 10 minutes; finally wash with deio...

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