Overview
Vanadium Boride (VB) is a refractory ceramic compound known for its exceptional hardness and thermal stability. Available in micron and nano particle sizes, it is synthesized through high-temperature reactions or advanced powder metallurgy techniques. Its unique combination of properties makes it valuable for demanding industrial applications. As a non-oxide ceramic, VB exhibits excellent resistance to oxidation and chemical attack, even at elevated temperatures. The nano-sized variant offers enhanced sinterability and mechanical performance in composite materials, while micron-grade powders are commonly used in bulk ceramic formulations.
Physical and Chemical Properties
Vanadium Boride powder is characterized by a hexagonal crystal structure, contributing to its anisotropic properties. It maintains structural integrity up to 1600°C in inert or reducing atmospheres, with a Vickers hardness of ~20 GPa, comparable to tungsten carbide. The material demonstrates metallic conductivity, distinguishing it from insulating ceramics. Its thermal expansion coefficient (~7.5×10⁻⁶/K) allows compatibility with metals in composite systems. Chemically, VB is inert to most acids and alkalis at room temperature but may react with strong oxidizers at high temperatures.
Main Applications
In industrial tooling, VB powder is incorporated into cutting inserts and drill bits for machining hardened steels and superalloys. Its wear resistance extends tool life by 30-50% compared to conventional materials in dry machining applications. The aerospace sector utilizes VB in thermal barrier coatings for turbine blades, where its high melting point and thermal shock resistance are critical. Emerging applications include electrodes for aluminum smelting and neutron shielding components in nuclear reactors due to boron's neutron absorption capability.
Safety and Storage
While Vanadium Boride is generally stable, nano-powders require careful handling due to potential dust explosion risks (minimum ignition energy ~30 mJ). Facilities should employ explosion-proof equipment and maintain dust concentrations below 10 mg/m³. Long-term storage requires argon or nitrogen-purged containers to prevent surface oxidation. Moisture-sensitive applications demand vacuum-sealed packaging with desiccants. Bulk quantities are typically supplied in 1-5 kg stainless steel cans or 25 kg fiber drums with inner plastic liners.
B2B Procurement Guide
Industrial buyers should specify: 1) Particle size distribution (D50 value for micron powders or BET surface area for nano powders), 2) Oxygen content (<1% for high-performance applications), 3) Trace metal impurities (particularly Fe, Cr, Ni for electronic applications). Leading manufacturers include Japan's Advanced Material Technologies and Germany's H.C. Starck. MOQ typically starts at 5 kg for standard grades, with lead times of 4-8 weeks for custom particle size distributions. Third-party certification to ISO 9001 and ISO 14001 standards is recommended for quality assurance.
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