Uncovering Diamond: The Mystery of Mechanical Miracles

Natural high-quality diamond is scarce and expensive, making it difficult to meet mechanical needs. However, the hardness of CVD single crystal and polycrystalline diamond is comparable to natural products and is widely used in cutting tools and wear-resistant parts. High Light Intelligence Technology specializes in the production of high-quality CVD diamond, monocrystalline and polycrystalline products; Its tensile strength reaches more than 3GPa and its mechanical properties are excellent. Polycrystalline diamond film has small grain size, high fracture strength and high elastic modulus, and plays an important role in the field of materials science. Diamond has anisotropic hardness and significant differences in crystal plane hardness, and can be used for efficient grinding and polishing.

Diamond has anisotropic strength and is prone to cracking in specific directions. In particular, the (111) crystal plane is prone to cleavage due to its large atomic interplanar spacing, high density, and low covalent bond formation energy. Its bulk elastic modulus is as high as 5.42×10⁵N/mm², far exceeding that of tungsten metal and stainless steel. Although diamond has strong compressive resistance, its tensile strength is low and it is hard and brittle. Its shear strength theoretical value is extremely high, reaching 12×10⁵MPa, showing excellent mechanical properties.

The friction coefficient of diamond in air is 0.05-0.1. The wear amount of diamond varies greatly due to different friction methods. The following table shows the relative wear amount of diamond after friction with various common hard materials under roughly the same conditions. It can be seen that the amount of wear of diamond is very small compared to various other materials. Therefore, diamond powder with micron- and nano-sized particles in the industrial field is widely used in surface grinding and fine polishing of various materials. Larger-sized synthetic diamond material sintered bodies can also be used in the field of high-hardness drill bits. The wear ratio range can even reach 1:3×10⁴-1:8×10⁴. The wear ratio range for wire drawing dies is 1: 10⁵-1:3×10⁵.

Diamond, with its unparalleled ultra-high hardness and excellent resistance to pressure and wear, has become an excellent choice for manufacturing various cutting tools, abrasives, drill bits and wear-resistant parts. In addition, diamond polycrystalline coating is also widely used in various types of cutting tools and grinding tools to provide them with excellent wear-resistant coatings. Its excellent elastic modulus and phonon vibration characteristics make diamond an ideal choice for producing high-quality surface pressure sensors and acoustic sensors, demonstrating its excellent application value in many fields.

The mechanical properties of diamond make it a unique material that plays an irreplaceable role in many fields. With the continuous development of science and technology, people will conduct more in-depth research on the properties of diamond, and it is believed that the application fields of diamond will be more extensive in the future. Whether used as cutting tools, abrasives or wear-resistant coatings for precision devices, diamond will continue to contribute to the development of human society with its excellent mechanical properties.