Natural single crystal diamond
15 6月 2018 | 没有评论 | posted by admin | in Article
Natural single crystal diamond is an anisotropic single crystal. With a hardness of HV9000-10000, it is the hardest material in nature. The wear resistance of this material is excellent, the tool can be made to maintain dimensional stability for a long time during cutting, and therefore has a long tool life.
The natural diamond cutter edge can be machined extremely sharply. Can be used to make ophthalmic and neurosurgical scalpels; can be used to process curved surfaces of contact lenses; can be used to cut light-guided glass fibers; used to process patterns of gold and platinum jewelry; the most important uses are high-speed ultra-finishing non-ferrous metals and their alloys. Such as aluminum, gold, babbitt, beryllium copper, copper and so on. Ultra-precision machining tools made with natural diamonds have a circular arc at the tip of the knife and are observed under a microscope at 400 magnifications. They are used for processing aluminum alloy polyhedral mirrors, oxygen-free copper laser mirrors, gyroscopes, and video recorder drums. The roughness can reach Ra (0.01-0.025) μm.
The natural diamond material has poor toughness and low bending strength, only (0.2-0.5) Gpa. The thermal stability is poor, and the hardness will be lost when the temperature reaches 700°C-800°C. When the temperature is higher, it will be carbonized. In addition, it has a strong affinity with iron and is generally not suitable for processing steel.
VD diamond film
12 6月 2018 | 没有评论 | posted by admin | in Article
The CVD diamond thick film is a chemical vapor deposition diamond material. As a tool material its hardness is higher than PCD. Because it contains no metal binder, it has high thermal conductivity and high temperature oxidation resistance. However, the CVD material currently produced has relatively poor toughness, and it cannot be cut and processed by a wire cutting method, and its use has been limited. Due to the lack of cutting directionality, the grinding process is poor, making it extremely difficult to grind as sharp edges as natural diamond and synthetic single crystal diamond. The use as a cutting tool is still in the experimental stage, pending further research and development.
Diamond Introduction
11 6月 2018 | 没有评论 | posted by admin | in Article
Diamond has particularly excellent mechanical properties, thermal properties, light transmission, longitudinal wave velocity, semiconductor properties, and chemical inertness in natural materials. It is an all-round irreplaceable special multifunctional material. The diamond film grown by Chemical Vapor Deposition (CVD) method has almost exactly the same performance as granular natural diamond and high-pressure synthetic diamond, but it overcomes the limitation of the size of small-grained natural diamond and high-pressure synthetic diamond.
