Factors Affecting Diamond Micropowder Strength

 

The strength of diamond micropowder is related to the single crystal raw materials used and the production process. Generally, the higher the strength of the diamond raw material, the higher the strength of the resulting diamond micropowder.

 

 

Diamond is synthesized from graphite under high temperature and pressure, a process termed diamond synthesis. Longer synthesis times result in more complete crystalline structures with fewer internal defects and impurities. Consequently, the produced micropowder exhibits higher wear resistance and strength grades. Internal crystal defects and impurities significantly influence the strength grade of diamond micropowder.

 

 

 

Diamond micro powder is obtained by crushing diamond single crystal raw materials. Currently, the crushing process in diamond micropowder production predominantly employs air-jet milling. Parameters such as air velocity, pressure, and classification wheel adjustments significantly influence micropowder grade. Therefore, optimizing these parameters to achieve uniform particle size while minimizing collision frequency is essential. This ensures high-strength micropowder is produced from high-strength raw materials; otherwise, high-strength raw materials may not yield high-strength micropowder.

 

 

Strong alkali or strong acid surface treatment is commonly employed to remove external impurities from diamond micropowder. To enhance self-sharpening properties, surface treatment methods are also applied to achieve a “polycrystalline-like” effect. Therefore, micropowder manufacturers must select surface treatment processes judiciously, avoiding excessive treatment solely for aesthetic appeal. Strong alkali and acid treatments can disrupt the crystalline structure of diamond particles, increasing surface defects and consequently reducing the powder's wear resistance and grade.

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