Info Behind Ultra Hard Materials

Super hard metals are the result of modern research and development. The previous 100 years had seen high growth in many fields of science and technology including material technology. The modern developments in science and technology resulted in the use of very hard materials in mechanical, automobile, sheet metal stamping and aviation industries. This in turn resulted in the development of new ultra hard cutting materials to make metal cutting tools to machine these parts. Apart from carbide cutters several other extreme hard materials like ceramic, polycrystalline diamond (PCD), mono-crystalline diamond (MCD-natural diamond), diamond coatings on cutters, synthetic mono-crystalline diamonds as well as polycrystalline cubic boron nitrite are developed.

Ultra Hard Metals
Proper use and applications of cutting tools made out of these extreme hard materials will result in major timing saving, higher cutting tool life, high cutting speeds, more accuracy, improved surface finish and can reduce the cost.
Polycrystalline Diamond (PCD)
Polycrystalline diamonds or PCD plates are produced by high temperature and high pressure method where the diamond coating is directly combined with a carbide support. Polycrystalline diamond is produced by sintering of superior quality diamond powder with metallic binder. Depending upon the usage polycrystalline diamond materials are available in various grain sizes. For instance the diamonds with rough grain sizes are used for producing cutting tools with higher resistance to wear and tear due to its ability to retain cutting edge for a longer period. If we require very high surface finish on machined parts, and then ultra micro grain sizes are highly preferred.
Medium grain sizes are used for normal all purpose cutting tools since it is a balance between high wear resistance of rough grain size and superior finish of ultra micro grains. This makes the medium grain sized polycrystalline diamond as preferred material for manufacturing high quality metal cutting tools.
Natural Diamonds
Mono crystalline diamond (MKD) is nothing but natural diamond out of pure carbon. These natural diamonds enable the production of geometric defined flutes with absolutely notch free flutes. Natural diamond (MKD) is one of the extreme hard materials which are appropriate for achieving superior surface finishes for mirror bright surfaces, machining of non-ferrous materials, micro machining and machining of titanium without burr.
Synthetic Mono-crystalline Diamond
Further research and development resulted in synthetic mono crystalline diamonds which are obtainable in triangles and rectangles with an edge length of approximately 8millmteres. The natural diamonds often contains nitrogen and it could have varying hardness and heat conductivity. But the synthetic mono-crystalline diamonds have uniform structure with same thermal conductivity and less internal stress.
In modern industry synthetic mono-crystalline diamonds are being made in various shapes and sizes which offers great application possibilities of this extreme hard material in future. Researches have found lot of improvements in synthetic mono-crystalline tool life, improved surface finish and fixed wear behavior compared to other extreme hard materials like PCD and natural diamond. More about ultra hard materials.