Boron carbide (BC)

Boron carbide (BC), a black crystal powder, is one of the hardest Man-Made materials, its hardness with Mohs hardness 9.36 and microscopic hardness 5400-6300kg/mm2 is only near upon diamond, its density is 2.52g/cm3 and melting point is 2450℃,The boron carbide possesses properties of endurance hi/low temperature, no reaction with either acids or alkalis, high grinding efficiency, no magnetism. It is a good replacement of diamond.

 

Boron carbide also possesses the special properties of light quality, neutron absorbing, semi-conductivity, etc., so it is used for armed forces and nuclear industry.

 

Boron carbide 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.

 

Boron carbide has showed many better properties of physics and chemistry in the hi-science/technology field.

 

 

Physical Characteristics

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

 

 

Chemical Composition

Grit

Chemical composition(%,by weight)

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.

 



Boron Carbide (BC)