Ultra Hard Materials
Ultra hard materials are the result of recent research and development. The last 100 years witnessed high progress in many fields of science and technology including material technology. The latest developments in science and technology resulted in the use of very hard materials in mechanical, automobile, metal stamping and aviation fields. This in turn resulted in the development of new ultra hard cutting materials to make cutting tool to machine these parts. Beside carbide cutting material several other ultra hard materials like ceramic, polycrystalline diamond (PCD), mono-crystalline diamond (MCD-natural diamond), diamond coatings on cutting tools, synthetic mono-crystalline diamonds as well as polycrystalline cubic boron nitrite are developed.
Extreme Hard Materials
Correct usage and applications of cutting tools made out of these super hard materials will result in major timing saving, better cutting edge life, high cutting speeds, better accuracy, superior 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 made by sintering of high quality diamond powder with metallic binder. Depending upon the application polycrystalline diamond materials are available in various grain sizes. For example the diamonds with rough grain sizes are used for making cutting tools with excellent wear resistance due to its ability to retain cutting edge for a very long period. If you are looking for very high surface finish on manufactured item, 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 producing high quality metal cutting tools.
Natural Diamonds
Mono crystalline diamond or 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 super hard materials which are suitable for attaining super surface finishes for mirror bright surfaces, machining of non-ferrous materials, micro machining and machining of titanium without burr.
Synthetic Mono-crystalline Diamond
More researches resulted in developing synthetic mono crystalline diamonds which are obtainable in triangles and rectangle shapes with an edge length of approximately eight millimeters. The natural diamonds often contains nitrogen and it could have varying hardness and heat conductivity. On the other hand 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 produced in differents shapes and sizes which offers great usage possibilities of this super hard material in future. Researches have found lot of improvements in synthetic mono-crystalline tool life, improved surface finish and constant wear and tear behavior compared to other ultra hard materials like Polycrystalline diamonds and natural diamond. Read more about ultra hard materials.
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Tags: technology
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