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Dragon Abrasives Import & Export Co.,Ltd

    

Boron Carbide(B4C)-Superhard Materials


[China]
Posted Date: October 03, 2008    Expiry Date: November 03, 2008
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Description
Key Properties

Boron carbide is characterised by its:

·         Extreme hardness

·         Difficult to sinter to high relative densities without the use of sintering aids

·         Good chemical resistance

·         Good nuclear properties

·         Low density


Property

Density (xxxxx-3) 2.52
Melting Point (°C) 2445
Hardness (Knoop 100g) (xxxxx-2) 2900-3580
Fracture Toughness (xxxxx-½) 2.9 - 3.7
Young's Modulus (GPa) 450 - 470
Electrical Conductivity (at 25°C) (S) 140
Thermal Conductivity (at 25°C) (W/m.K) 30 - 42
Thermal Expansion Co-eff. x10-6 (°C) 5
Thermal neutron capture cross section (barn) 600


Applications

Abrasives

Due to its high hardness, boron carbide powder is used as an abrasive in polishing and lapping applications, and also as a loose abrasive in cutting applications such as water jet cutting. It can also be used for dressing diamond tools.


Nozzles

The extreme hardness of boron carbide gives it excellent wear and abrasion resistance and as a consequence it finds application as nozzles for slurry pumping, grit blasting and in water jet cutters.


Nuclear applications

Its ability to absorb neutrons without forming long lived radio-nuclides make the material attractive as an absorbent for neutron radiation arising in nuclear power plants. Nuclear applications of boron carbide include shielding, and control rod and shut down pellets.


Ballistic Armour

Boron carbide, in conjunction with other materials also finds use as ballistic armour (including body or personal armour) where the combination of high hardness, high elastic modulus, and low density give the material an exceptionally high specific stopping power to defeat high velocity projectiles.


Other Applications

Other applications include ceramic tooling dies, precision toll parts, evaporating boats for materials testing and mortars and pestles.
 
Other Information
Location:  China 
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  (This price is only for minimum order. for large quantities, please contact)
Sample Available:  Yes 
Price for Sample:   
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Related Categories: Pneumatic & Air Tools, Abrasives, BulletProof
Related Keywords: boron carbide, ballistic armour, spray nozzles
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