JR, CBN DIAMOND GRINDING WHEELS

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Boron carbide (boron carbide), alias black diamond, formula of B4C, usually colored powder.Is one of the hardest three known materials (the other two for diamond and cubic boron nitride), used for tanks armor, bulletproof garment and many industrial products should be.Its mohs hardness is 9.3.

It in the 19th century as a by-product of metal boride study found, until the 1930 s by scientific research.Boron carbide can be used in electric furnace carbon boron trioxide.

Boron carbide can absorb a large number of neutrons and will not form any radioactive isotope, so it is in the field of nuclear power it is ideal neutron absorber, and neutron absorber mainly control the rate of nuclear fission.Boron carbide in nuclear reactor field is mainly to make control rod, but sometimes because of to increase the surface area and make it into powder.

Because of the low density, good strength, high temperature stability and chemical stability characteristics.In the wear-resistant materials, ceramic reinforced phase, especially in light armor, reactor neutron absorber, etc.In addition, compared with diamond and cubic boron nitride, boron carbide easy manufacturing, low cost, and more widely used, in some places can replace expensive diamond, common application in grinding, grinding, drilling, etc.

Because the boron carbide in a long time ago, it has been as a kind of coarse sand grinding material.Due to its high melting point, is not easy to cast artifact, but by high temperature melting powder, it can be processed into simple shapes.Used in grinding of hard materials, such as cemented carbide, etc., milling, drilling and polishing.