CVD Diamond Coated Carbide Pretreatment—Mechanical Process (2/2)

Except the mechanical grinding, ultrasonic cleaning is another common mechanical process. Ultrasonic cleaning mainly uses the cavitation of ultrasonic in the liquid (Ultrasonic high frequency changes in the way more than twenty thousand times per second, compression force and reducing stress interactive transmission to liquid, at reduced pressure, vacuum nuclei bubble phenomenon liquid; compression force under vacuum nuclei broken bubble compression have a great impact, and thus the substrate surface dirt peel to achieve precision cleaning purposes.), acceleration effect, direct current effect (a phenomenon of ultrasonic flows with the direction of sound propagation in the liquid, which runs straight into the stream to be cleaned so that the substrate surface dirt is stirred to the surface of the cleaning fluid convection, dissolve dirt solution and mixed with fresh liquid, so that the dissolution rate greatly accelerate and facilitate the removal of impurity.) and the direct or indirect effect of liquid and impurity, which cleaned by the ablation, diffusion and emulsification of the impurity layer.

When it used in the ultrasonic cleaning technology is the use of CVD diamond film crystallite or fine powder of nano-sized diamond suspension (commonly, such as ethanol, acetone, etc.) on the substrate surface is processed, so that not only can be more thoroughly cleaned Carbide the substrate surface, but also can be dispersed diamond powder implanted in the substrate, greatly increase the nucleation rate of diamond films. Therefore, mechanical process is one of the widely used pretreatment of the matrix, which has many advantages, such as easy operation, simple equipment, high efficiency, low cost and so on. In addition, it is suitable for the most of materials of matrix, which only destroys the surface of the matrix slightly and does not has any influence on the other properties so that it has a broad prospect in medical, optics and textile dyeing industries.

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