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Boron carbide（B4C）is an extremely hard boron-carbon ceramic. discovered in 1899, Boron carbide has a Mohs hardness of about 9.49, which is the third-highest hardness material after diamond and cubic boron nitride. As of 2015, boron carbide is the third hardest substance known, after diamond and cubic boron nitride, earning it the nickname “black diamond”.
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Boron carbide（B4C）is an extremely hard boron-carbon ceramic. discovered in 1899, Boron carbide has a Mohs hardness of about 9.49, which is the third-highest hardness material after diamond and cubic boron nitride. As of 2015, boron carbide is the third hardest substance known, after diamond and cubic boron nitride, earning it the nickname “black diamond”. Boron carbide is used as a bulletproof plate. it was applied widely in industries as wearing resistant material, abrasive. Boron carbide is also the most important ceramic material for ceramic armor. This carbide ceramic is used in tank armor and bulletproof vests. Boron carbide bulletproof plate has good corrosion resistance, great mechanical strength under high temperature and excellent wear resistance.
Synonyms
BC, Tetrabor, carbon tetrabromide, black diamond, boron-carbon refractory ceramic
Dimensions
| Material | Size |
| Boron Carbide | 250mm×300mm (standard) |
| 300*350mm | |
| 350*400mm | |
| 600*600mm | |
| 800*800mm | |
| custom size |
Per your request or drawing
We can customized as required
Properties（Theoretical）
| Compound Formula | CB4 |
| Molecular Weight | 55.26 |
| Appearance | Gray/black solid |
| Melting Point | 2445℃ |
| Boiling Point | N/A |
| Density | 2.1 to 2.7 g/cm3 |
| Solubility in H2O | N/A |
| Electrical Resistivity | 0 to 11 10x Ω-m |
| Poisson's Ratio | 0.17-0.18 |
| Specific Heat | 950 J/kg-K |
| Tensile Strength | 350 MPa (Ultimate) |
| Thermal Conductivity | 31 to 90 W/m-K |
| Thermal Expansion | 4.5 to 5.6 µm/m-K |
| Vickers Hardness | 26 MPa |
| Vickers hardness | >2800 Kgf/mm2 |
| Young's Modulus | 240 to 460 GPa |
| Fracture Toughness | >3.0Mpa.m1/2 |
| Elastic Modulus | >400Gpa |
| Exact Mass | 56.037222 |
| Monoisotopic Mass | 56.037222 |
| Property | Units | Value | Value | Value |
| REACTION BONDED | Hot-pressed | Pressureless sintered | ||
| Flexural Strength, MOR (20 °C) | MPa | 250 | 320 - 450 | 450 |
| Fracture Toughness, KIc | MPa m1/2 | 3.0 - 4.0 | 3.0 - 4.0 | 3.0 - 5.0 |
| Thermal Conductivity (20 °C) | W/m K | 50 | 45 - 100 | 43 - 100 |
| Coefficient of Thermal Expansion | 1 x 10-6/°C | 4.5 | 4.5 - 4.9 | 4.5 - 4.9 |
| Maximum Use Temperature | °C | 1000 | 2000 | - |
| Dielectric Strength (6.35mm) | ac-kV/mm | - | - | - |
| Dielectric Loss (tan δ) | 1MHz, 25 °C | - | - | - |
| Volume Resistivity (25°C) | Ω-cm | 103 | 100 | 10 |
● High hardness
● Low density
● High melting point
● High elastic modulus
● Chemical inertness
● High neutron absorption cross-section
● Excellent thermoelectric properties
Boron Carbide Machining
Boron Carbide can be machined in green, biscuit, or fully dense states. While in the green or biscuit form it can be machined relatively easily into complex geometries. However, the sintering process that is required to fully densify the material causes the Boron Carbide body to shrink approximately 20%. This shrinkage means that it is impossible to hold very tight tolerances when machining Boron Carbide pre-sintering. In order to achieve very tight tolerances, fully sintered material must be machined/ground with diamond tools. In this process a very precise diamond coated tool/wheel is used to abrade away the material until the desired form is created. Due to the inherit hardness of the material, this can be a time consuming and costly process.
-Abrasive field: Surfaces of watches and jewels.
-Refractory materials: As an antioxidant additive in the refractory field.
-Ceramics materials: As materials made of boron carbide products and wear-resistant components used in blasting, sealing, machinery, ships, auto, dies, aviation and aerospace industries.
-Armor tiles: High-density boron carbide armor tiles, bulletproofing seats of helicopters. Widely used in heavy armored protection in planes/tanks/ships, and high-class physical protection.Military Army Security/Special Force/ Military Officers/ Policemen/ Soldiers
-Nuclear industry: Boron carbide is an important material for nuclear applications due to its high absorption cross-section.
-Boriding Agent: Boron carbide is a raw material used in boriding agents. After the treatment, the hardness and the wear resistance of the surface are greatly improved.
-Chemical additives: Because of boron carbide's good chemical resistance, for producing other boron-containing materials such as titanium boride or zirconium boride.
-Solid fuel: Boron carbide-based propellants for ducted rockets.
Standard Packing:
Sealed bags in carton boxes. Special package is available on request.
As a ceramic material, B4C is quite fragile in a lot of cases. The B4C Bulletproof Plate are usually held in plastic bags by vacuum, and protected with heavy foam.
ATTs’ B4C Bulletproof Plate is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
| Linear Formula | B4C |
| MDL Number | MFCD00011520 |
| EC No. | 235-111-5 |
| Beilstein/Reaxys No. | N/A |
| Pubchem CID | 123279 |
| IUPAC Name | N/A |
| SMILES | B12B3B4B1C234 |
| InchI Identifier | InChI=1S/CB4/c2-1-3(2)5(1)4(1)2 |
| InchI Key | INAHAJYZKVIDIZ-UHFFFAOYSA-N |
