Different Applications of Monocrystalline and Polycrystalline Diamond

Application fields of polycrystalline diamond:

As a precision abrasive, it is used for ultra-precision grinding and polishing of sapphire, magnetic head, hard disk, hard glass and crystal, ceramics and hard alloy, such as LED sapphire thinning. As coating additive, it can be used for coating of metal mould, tool, component and so on, which can greatly improve the surface wear resistance, surface hardness and prolong the service life. It is mainly used for grinding and is generally prepared into grinding fluid for use. It is also could be applied to make knives that are not prone to crack during cutting.

Application fields of Monocrystalline Diamond are as follows:

Mechanical processing industry
Diamond grinding tool is a special tool for grinding hard alloy. When grinding carbide turning tools, the consumption of GC abrasive is 4-15g for 1g metal removal, but only 2-4 mg for diamond.

Electronic and electrical industry
Hard and brittle valuable semiconductor materials, such as silicon, germanium, gallium arsenide and so on, need to be cut and ground to make small sheet semiconductor devices. At present, the most suitable method is applying diamond cutting saw blade. Polishing semiconductor materials with diamond paste not only has high efficiency, but also can achieve the highest surface roughness Ra0.006um.

Optical glass and gemstone processing industry
In the past, with silicon carbide applied in optical glass process, the process efficiency was low and its working conditions was also poor. Now all of them have been processed with diamond tools, including blanking, nesting, cutting, edge grinding, and fine grinding of convex and concave surfaces.

Drilling and mining industry
Diamond bits are widely used in Drilling and mining oil, coal, metallurgy, geological exploration and others.

Construction and building materials industry
Diamond tools are widely used in cutting and grinding of marble, granite, artificial cast stone and concrete building materials.

monocrystalline vs polycrystalline diamond, polycrystalline diamond is less prone to get surface scratches; but monocrystalline diamond and polycrystalline diamond are also different in their application fields.