Boron Carbide (B4C), also known as black diamond, is the third hardest material after diamond and cubic boron nitride. It is a suitable material for many high performance applications due to its attractive combination of properties. Its outstanding hardness makes it a suitable abrasive powder for lapping, polishing and water jet cutting of metals and ceramics.
Boron Carbide (B4C), also known as black diamond, is the third hardest material after diamond and cubic boron nitride. It is a suitable material for many high performance applications due to its attractive combination of properties. Its outstanding hardness makes it a suitable abrasive powder for lapping, polishing and water jet cutting of metals and ceramics. The combination of low specific weight, high hardness and reasonable toughness makes it a suitable material for body and vehicle armor. Boron carbide is also extensively used as control rods, shielding materials and as neutron detectors in nuclear reactors due to its ability to absorb neutrons without forming long lived radionuclide. As it is a p-type semiconductor, boron carbide can be a suitable candidate material for electronic devices that can be operated at high temperatures. Boron Carbide is also an excellent p-type thermoelectric material.
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Chemical Composition |
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|
Grit |
Chemical composition（%，by weight） |
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|
B4C |
T.B |
F.B |
T.C |
F.C |
Fe2O3 |
|
|
F4-F90 |
≥95 |
≥76 |
≤0.3 |
18-21 |
≤1.5 |
≤0.3 |
|
F100-F220 |
≥96.5 |
≥76 |
≤0.3 |
18-21 |
≤1.6 |
≤0.3 |
|
F230-F320 |
≥96 |
77-81 |
≤0.4 |
18-21 |
≤1.5 |
≤0.2 |
|
F360-F500 |
≥95 |
76.5-80 |
≤0.4 |
18-21 |
≤1.8 |
≤0.2 |
|
F600-F800 |
≥94 |
76-80 |
≤0.45 |
18-21 |
≤2.0 |
≤0.25 |
|
F1000-F1200 |
≥93.5 |
76-79 |
≤0.5 |
18-21 |
≤2.5 |
≤0.3 |
Note: Special requirement on chemical composition can be satisfied through discussion.
Physical Property
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Physical Characteristics |
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Item |
Crystal system |
Crystal color |
Density |
Melting point |
Mohs hardness |
Micro hardness |
|
Boron carbide |
Hexagonal |
Black |
2.52g/cm3 |
2450℃ |
9.36 |
5400-6300kg/mm2 |
High hardness
Low density
High melting point
High elastic modulus
Chemical inertness
High neutron absorption cross-section
Excellent thermoelectric properties
Boron carbide (B4C) is widely applied as follows: boriding refractory, ion transfusion, film layer as well as grinding, polishing, drilling hard metal alloys, jewels, etc. Meanwhile, it is main material for the wear-resisting parts, precise meter-age element, precise spray nozzle, sealed washer, smelting boron steel, boron alloy, etc.
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