Composite Coating Additives Adding nanodiamond powder to electroplating or brush plating processes (such as composite nickel plating) can significantly improve the hardness and wear resistance of the coating. Compared to coatings without diamond powder, the hardness can increase by 50% and the wear loss is greatly reduced. This technology has also been used to manufacture highly efficient wear-resistant protective layers for magnetic disks or heads.
2. Strength Enhancers for Plastics and Rubbers
Plastic modification: Adding nanodiamonds as fillers into plastics can cause a sharp increase in their Young's modulus and significantly improve the longitudinal and transverse elongation at break of the materials.
Rubber reinforcement: Adding nanodiamonds to fluororubber can double its wear resistance. If added to polyisoprene rubber used for manufacturing tires, various parameters can be improved by 1.3 to 1.7 times, with particularly significant improvements in tear resistance.
3. Highly Efficient Lubricating Oil Additives Adding nanodiamonds to lubricating oils leverages their unique nanoscale small size effect. Spherical nanodiamond particles can roll between the surfaces of friction pairs, forming a "ball bearing effect" that transforms sliding friction into a mixed friction of rolling and sliding. This not only reduces the volume of wear debris, avoids cylinder scoring, and improves fit precision, but also lowers engine friction power consumption, saves 5%–7% of crude oil consumption, and extends engine service life by 50,000 to 100,000 kilometers.
4. Fine Abrasive Materials Polishing liquids or polishing blocks made from nanodiamond powder can process surfaces with extremely high smoothness. For example, they can be used to manufacture extremely smooth X-ray reflection mirrors, or lower the surface roughness of ceramic balls to 0.013 μm through magnetic fluid polishing technology.
5. Applications in Biomedical and Other High-Tech Fields
Biomedicine: Nanodiamond powder can be used as a biological antibody source carrier to manufacture certain antibody drugs, achieving good medical results.
Electronic imaging: Using nanodiamond powder to manufacture photosensitive materials for electronic imaging can significantly improve the working performance of photocopiers.
Diamond film deposition: Applying a nanodiamond suspension onto a single-crystal silicon substrate to form a microcrystalline layer can greatly accelerate the growth rate of diamond films and increase the nucleation density during chemical vapor deposition (CVD).
Precision tool manufacturing: Because the nanoparticles are extremely fine, after being sintered into polycrystalline nanometer-sized diamond (PCD), the crystals remain fine and possess high hardness and impact resistance, showing great potential for manufacturing precision tools.