Carbure de bore (B4C): Properties, Applications, and Industrial Value

As one of the hardest known materials, carbure de bore (B4C) has become indispensable across industries ranging from abrasives and ceramics à nuclear shielding and defense armor. Abrasifs supérieurs du Henan (HSA), a trusted boron carbide supplier from China, provides high-quality B4C powder and products to meet global customer needs.

Properties of Boron Carbide

Carbure de bore (B4C) is an extremely hard synthetic inorganic non-metallic material with a Mohs hardness of 9.36 and a microhardness of 5,500–6,700 kg/mm², ranking only after diamond and cubic boron nitride (CBN).

• Structure cristalline: Hexagonal
• Densité: 2.52 g/cm³
• Melting Point: 2450° C
• Thermal Expansion Coefficient: 4.5×10⁻⁶/°C (20–1000°C)
• Conductivité thermique: 121.42 W/(m·K) at 100°C; 62.80 W/(m·K) at 700°C
• Electrical Resistivity: 0.44 Ω·cm at 20°C; 0.02 Ω·cm at 500°C

Boron carbide is insoluble in water and organic solvents, resistant to both acids and alkalis, and maintains stability in high-temperature oxidation environments.

Thanks to its abrasive efficiency (50% higher than silicon carbide and 1–2 times greater than alumina) and its neutron absorption capacity, boron carbide plays a crucial role in affûtage, nuclear shielding, and ballistic protection.

Main Applications of Boron Carbide

1. High-Grade Grinding and Polishing Material

Boron carbide powder is widely used for:

• Sapphire processing
• Ceramic grinding
• Cutting tools and bearings finishing
• Hard alloy polishing

Compared to traditional abrasives, boron carbide abrasive powder offers faster cutting speed, better surface quality, and longer service life.

2. Industrial Specialty Ceramics

Boron carbide ceramics, made by high-temperature sintering of B4C powder, are ideal for:

• Sandblasting nozzles
• Pump plungers
• Grinding rods
• Rocket launcher components

These parts are widely used in aérospatial, automobile, and defense industries due to their dureté élevée, basse densité, and superior wear resistance.

3. Nuclear Industry Shielding and Control

Boron carbide has a large neutron capture cross-section, making it the preferred material for reactor control rods and radiation shielding blocks.

It is extensively applied in:

• Fast neutron breeder reactors
• High-temperature gas-cooled reactors

Internationally, boron carbide nuclear materials are recognized as safe and efficient shielding solutions.

4. Lightweight Ballistic Armor

Boron carbide is known as the ultimate armor material because of its:

• High hardness
• Haute résistance
• High fracture toughness
• Basse densité

It is widely used in personal body armor, tank armor, helicopter protection, and naval defense.

Boron carbide ballistic plates are lighter than steel, while providing excellent ballistic resistance, enhancing mobility and survival rates in modern warfare.

5. Boron Carbide Wear-Resistant Alloy Powders

By combining boron carbide with metals, industries produce B4C-based wear-resistant coatings and alloys.

Applications include:

• Mining machinery
• Heavy-duty mechanical components
• Tools exposed to acid-alkali corrosion

This extends service life and reduces replacement costs for critical equipment.

6. Advanced Refractory Materials

Boron carbide’s oxidation resistance makes it valuable in steelmaking refractories. Benefits include:

• Preventing carbon oxidation in carbon-containing refractories
• Reducing porosity
• Improving erosion resistance

This application is essential in steel and metallurgical industries.

7. Chemical Industry Additives

Boron carbide is a precursor material for advanced boron-based compounds such as:

• Titanium boride (TiB₂)
• Zirconium boride (ZrB₂)
• Boron nitride (BN)
• Boron hydrides

These compounds are used in électronique, metallurgy, and chemical engineering.

8. Rocket Solid Fuel Additives

Due to its high energy density, boron carbide powder is applied as an additive for solid rocket fuels.

It improves:

• Combustion energy
• Conductivité thermique
• Overall propulsion efficiency

This makes it highly valuable in aerospace and defense applications.

Why Choose Henan Superior Abrasives as Your Boron Carbide Supplier?

Abrasifs supérieurs du Henan (HSA) is a leading boron carbide manufacturer and exporter from China, trusted by customers worldwide.

We provide:

• High-purity boron carbide powder for grinding and polishing
• Boron carbide ceramics and components for industrial applications
• Nuclear-grade boron carbide materials for radiation shielding
• Customized boron carbide armor solutions for defense

Our Advantages

• Strict quality control ensures consistent performance
• Competitive pricing to reduce your costs
• Global shipping with on-time delivery
• Technical support for customer-specific needs

If you are looking for a reliable boron carbide supplier, Henan Superior abrasifs est votre partenaire de confiance.

📧 Contact us today: sales@superior-abrasives.com