Application of Silicon Carbide SiC in Wear-Resistant Industry
Silicon carbide SiC includes black silicon carbide C (Mohs hardness 9.15) and green silicon carbide GC (Mohs hardness 9.4)
Black Silicon Carbide C
Silicon carbide SiC is widely used in the wear-resistant industry. Its high hardness, high temperature resistance, corrosion resistance and other characteristics make it a key material. The following are specific applications and technical features:
I. Wear-resistant parts of industrial equipment
Core wear-resistant parts
Wear-resistant balls: used in equipment such as grinding mills and ball mills to improve grinding efficiency and reduce energy consumption.
Wear-resistant plates/linings: used in wear parts of metallurgical and mining equipment to resist high impact and particle erosion.
Wear-resistant pipes/elbows: transport high-temperature and corrosive media (such as slurry and coal powder) to reduce wear and leakage.
Coating and surface treatment
As a ceramic coating material, silicon carbide SiC can form a wear-resistant and high-temperature resistant protective layer, which is used for turbine impellers, cylinder body inner walls, etc.
The coating remains stable at high temperatures (1600°C) and is suitable for aircraft engine components and high-temperature industrial equipment.
2. High-temperature and extreme environment applications
High-temperature process adaptability
Silicon carbide SiC ceramics are used as linings or conveying pipes in metallurgical sintering furnaces and medium-frequency heating forging furnaces to withstand high-temperature metal particles and ore wear.
Its low thermal expansion coefficient (4.0×10⁻⁶ K⁻¹) and thermal stability (1600°C) reduce the risk of thermal cracking.
Corrosive media response
In the chemical and petroleum industries, silicon carbide SiC pipes can transport corrosive media such as concentrated acids and alkalis, and have both wear resistance and corrosion resistance.
3. Material performance optimization technology Modification technology improves performance
Nanocomposite : Enhance fracture toughness and fatigue resistance through micro-nano composite structures to extend component life
Fiber reinforcement : Carbon fiber or metal fiber composites improve impact resistance and are suitable for high-impact environments such as mines .
Optimization of heat treatment process: Adjust phase composition and microstructure to improve thermal stability and mechanical properties.
Preparation of functional ceramics
As an additive, silicon carbide SiC can be used to prepare wear-resistant ceramics and corrosion-resistant ceramics, which are used as functional materials in the fields of electronics and communications.
4. Industry application cases
Power industry: Silicon carbide SiC pipes are used for ash and coal powder transportation to resist particle wear. Metallurgy/Mining: Wear-resistant liners and pipes are used in ore processing equipment to reduce the frequency of downtime maintenance.
Automotive industry: High-performance brake discs, turbocharger rotors and other high-temperature wear-resistant parts.
Aerospace: Engine high-temperature parts and thermal protection systems, using their high temperature resistance and antioxidant properties.
Through the above applications, silicon carbide SiC has significantly improved the wear life and efficiency of industrial equipment, becoming an indispensable material in the modern wear-resistant field.