Used as a critical additive in cutting tools and wear-resistant coatings due to its exceptional hardness and thermal stability. Enhances the performance of cemented carbides by inhibiting grain growth during sintering, resulting in finer microstructures and improved mechanical strength. Applied in aerospace components, high-speed machining tools, and extreme environment applications where resistance to heat, corrosion, and abrasion is essential. Also utilized in electronic materials and advanced ceramics requiring high electrical conductivity and thermal shock resistance.