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Reaction Bonded Silicon Carbide for Metallurgy, Electronics, and Aerospace
Reaction Bonded silicon carbide (RBSC or SiSiC) is a high-performance engineering ceramic composite material prepared through a reactive melting process. This product involves mixing silicon carbide powder with a carbon source, molding the mixture, and then reacting it with the carbon via capillary penetration of liquid silicon at a high temperature of 1400°C to 1600°C. This reaction generates a new silicon carbide phase, tightly binding the original particles and ultimately forming a dense, high-strength, and wear-resistant ceramic structural component.
Reaction Bonded Silicon Carbide for Metallurgy, Electronics, and Aerospace
Product Description
As a mainstream category accounting for approximately 24% of the silicon carbide ceramic market, with a global annual consumption exceeding 16,000 tons, it is widely used in high-end manufacturing fields such as metallurgy, electronics, and aerospace. RBSC ceramic components, manufactured using the reaction sintering process, possess ultra-wear resistance, high-temperature resistance, corrosion resistance, and thermal shock resistance. They can be manufactured into various forms such as crucibles, pipes, elbows, and reducers, and are widely used in lithium battery material sintering, mining and power transmission, chemical and environmental protection fields, etc. Compared to traditional metal or cast stone components, it has a longer service life and a lower risk of material contamination, making it an ideal upgrade solution for high-temperature, highly corrosive, and high-scouring operating conditions. It can significantly reduce equipment maintenance costs and improve production stability.
Core Technological Advantages
| Process Characteristics | Technical Specifications | Customer Value |
| Near-net-size Molding | sintering shrinkage rate <<1%, capable of forming complex geometries in one step. | significantly reduce subsequent machining costs and time. |
| Complex Structure Capability | supports the manufacturing of hollow, thin-walled, irregularly shaped, and large-sized components. | breaking through the limitations of traditional ceramic forming, it offers a high degree of design freedom. |
| High Density | free silicon fills the residual pores, with a porosity of << 0.1%. | excellent sealing and impermeability |
| Cost Controllable | low sintering temperature (1400-1600°C), short cycle time | compared to hot pressing/pressureless sintering, the cost-effectiveness is significantly improved. |
Reaction sintering can reduce material waste by 40% and is the most effective method for preparing large-size, complex-shaped silicon carbide ceramics.
Product Performance Parameters
| Performance Indicators | Typical Value | Test Standards |
| Density | 3.00 ~ 3.05 g/cm³ | ASTM C20 |
| Hardness | HRA 90 ~ 92 / HV 2400 ~ 2800 | ASTM E384 |
| Flexural Strength | 250 ~ 400 MPa | ASTM C1161 |
| Compressive Strength | 1200 ~ 1800 MPa | ASTM C773 |
| Elastic Modulus | 330 ~ 380 GPa | ASTM C848 |
| Fracture Toughness | 3.5 ~ 4.5 MPa·m½ | ASTM C1421 |
| Thermal Conductivity | 120 ~ 150 W/(m·K) | ASTM E1461 |
| Coefficient of Thermal Expansion | 4.0 ~ 4.5 ×10⁻⁶ /K (RT~1000°C) | ASTM E228 |
| Maximum Operating Temperature | 1380°C (in air) | — |
| Free Silicon Content | 8% ~ 15% | chemical analysis method |
Product Series
| Product Category | Typical Specifications | Main Applications |
| Mechanical Seal Ring | Φ20~Φ500mm, thickness 3~50mm | chemical pumps, seawater desalination, nuclear power plant seals |
| Bushings and Bearings | inner diameter 10~200mm, length ≤600mm | high-speed rotating machinery, oil-free self-lubricating system |
| Desulfurization Nozzle | threaded/flange connection, spray angle 30°~120° | FGD flue gas desulfurization and spray tower |
| Heat Exchange Tubes/Plates | pipe diameter Φ10~Φ80mm, wall thickness 2~10mm | waste heat recovery, chemical heat exchangers |
| Kiln Furniture and Firing Plates | flat/irregular shapes, up to 1200×600mm | electronic ceramics sintering, powder metallurgy |
| Wafer Carrier | crystal boat, cantilever propeller, diffuser tube | semiconductor diffusion, PECVD, annealing process |
| Sandblasting Nozzle/Wire Drawing Die | inner diameter Φ0.5~Φ20mm | surface treatment, metal brushing |
| Armored Protective Plate | flat/curved, thickness 5~50mm | bulletproof armor, protective shelter |
Customization Services
We support full-process customization services based on customer drawings or working conditions, from material formulation design and mold development to finished product delivery. Minimum wall thickness can reach 1mm, and maximum single-piece size can reach 1500×1000×600mm.
Product Core Competitive Advantages
1. Excellent wear and corrosion resistance
Wear resistance: hardness second only to diamond and cubic boron nitride, suitable for high-solids slurry erosion conditions.
Chemical resistance: resistant to strong acids (except hydrofluoric acid), strong alkalis, and molten metal corrosion; inert to almost all chemical media except hydrofluoric acid.
2.Excellent thermal management performance
Thermal conductivity as high as 120~150 W/(m·K), 5~8 times that of alumina ceramics; low coefficient of thermal expansion, good metal compatibility, and excellent thermal shock resistance.
3.Design and manufacturing flexibility
Capable of forming conical, sleeve-shaped, and complex engineering structural components; dimensional accuracy up to ±0.5% (sintered state), and ±0.02mm after finishing.
4.Economic Advantages
Compared to pressureless sintered silicon carbide (SSiC), manufacturing costs are reduced by 20%~40%. Compared to hot-pressed silicon carbide (HPSiC), it is more suitable for mass production of complex shapes.
Key Application Areas
1.Semiconductor and Photovoltaic Industry
Wafer Carrier Systems: wafer boats, cantilever propellers, quartz replacement components
Process Chamber Components: diffusion tubes, PECVD carriers, annealing boats
High Purity Requirements: we can provide products with low metal impurities (Fe << 50ppm)
2.Chemical and Environmental Protection Industries
Mechanical Seals: pump sealing rings, magnetic pump isolation sleeves
Desulfurization Systems: spray nozzles, demisters, agitators
Corrosion-Resistant Piping: heat exchanger tubes, valve linings
3.New Energy and Power
Thermal Management System: heat dissipation substrate for electric vehicle power modules
Photovoltaic Polysilicon: reduction furnace bell jar, silicon material carrier
Nuclear Energy: wear-resistant lining for nuclear waste treatment equipment
4.Aerospace & Defense
Armor Protection: composite ceramic panels, bulletproof inserts
Propulsion System: solid rocket motor nozzle, throat liner
Thermal Protection: engine hot-end components, combustion chamber liner
5.Metallurgy and Machinery Manufacturing
High-Temperature Kiln Furniture: pusher plates, saggers, crossbeams, rollers
Wear-Resistant Parts: hydrocyclone Liners, crusher liners
Precision Parts: metering pump valve cores, wire cutting guide wheels
Selection Guide
| Application Scenarios | Recommended Level | Key Considerations |
| Semiconductor High Purity Process | electronic grade | metallic impurities << 100 ppm, surface roughness Ra << 0.4 μm |
| Strong Acid and Alkali Corrosive Environments | corrosion resistant | compactness >99.5%, no penetrating pores |
| High Temperatures above 1380°C | not applicable | we recommend using pressureless sintered silicon carbide (SSiC). |
| Long-term Service in Strong Alkaline/Oxidizing Atmosphere | use with caution | the free silicon phase may be corroded, and the operating conditions need to be assessed. |
| High Impact Load | toughened grade | optional carbon fiber/whisker toughening modified products |
Service Commitment
Our workshop
|
CNC Workshop |
Testing Room |
|
Surface grinding Workshop |
Sintering Workshop |
|
Circular Grinding Workshop |
Injection molding Machine Workshop |
Why choose us?
1.Customized R&D, rather than standard product adaptation
2.Deep control of materials science：Material Selection Based on Needs，Microstructure Optimization，Batch Consistency
3.Precision machining capability：Flatness can reach 0.001mm, parallelism 0.002mm, and roughness Ra 0.1μm.
FAQ
Q1: What products does your company offer?
We specialize in high-performance ceramics such as alumina and silicon nitride, providing insulators, structural components, wear-resistant parts, and customized solutions.
Q2: Can you customize non-standard parts?
Yes. We support processing based on provided drawings and collaborative technical development, offering a full-process service from design to mass production.
Q3: What about accuracy and delivery time?
Standard tolerance ±0.05mm, precision grade ±0.01mm; samples 7-15 days, bulk orders 20-30 days.
Q4: Main application areas?
Power, electronics, machinery, chemical, and aerospace industries.
Q5: Quality assurance measures?
Full-process quality inspection, providing material reports and performance test data, supporting third-party certification and testing.
Q6: Do you provide technical support?
We provide professional support such as material selection consultation, design optimization, and failure analysis.
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