ULPMAT

Refractory Materials | Carbides, Nitrides, Borides, Silicides

Refractory materials are special substances designed to withstand extremely high temperatures, mechanical stresses and corrosive environments. They are vital in industries such as metallurgy, ceramics, aerospace and energy, and are used in the manufacture of furnace linings, heat shields and high-temperature components, among others.

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Refractory Materials Overview
Refractory materials based on carbon (C), nitrogen (N), boron (B), and silicon (Si) are known for their excellent thermal stability, mechanical strength, and high-temperature resistance. These materials—including carbides, nitrides, borides, and silicides—are essential for industrial and technological fields requiring extreme durability.

Refractory Types

Typical Examples:

  • Carbides: Silicon carbide (SiC), tungsten carbide (WC), titanium carbide (TiC)
  • Nitrides: Silicon nitride (Si₃N₄), aluminum nitride (AlN), boron nitride (BN)
  • Borides: Titanium boride (TiB₂), zirconium boride (ZrB₂), hafnium boride (HfB₂)
  • Silicides: Molybdenum silicide (MoSi₂), zirconium silicide (ZrSi₂), tantalum silicide (TaSi₂)

Characteristics of Refractory Materials:

  • Excellent high-temperature stability: maintain strength above 1500°C
  • High hardness and wear resistance: ideal for tools, abrasives, coatings
  • Chemical inertness: resists oxidation and corrosion in harsh conditions
  • Excellent thermal conductivity: essential for electronics and engine heat dissipation
  • Electrical properties range from insulators (BN) to semiconductors (SiC)

Applications:

  • Electronics & Semiconductors: substrates, insulation, high-power devices (e.g. SiC, AlN)
  • Cutting Tools: drills, wear-resistant coatings, abrasives
  • Energy Sector: used in nuclear reactors, fuel cells, thermal barrier coatings
  • Chemical Processing: corrosion-resistant linings, reactor parts

Refractory Applications

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