Desvelando el poder del carburo de silicio ligado por reacción: Una guía completa

Desvelando el poder del carburo de silicio ligado por reacción: Una guía completa

Reaction-bonded silicon carbide is a ceramic preparation method with advantages such as good thermal stability, high-temperature resistance, and high thermal conductivity.

Next, let’s take a look at the main manufacturing process of silicon carbide ceramic – reaction bonded silicon carbide.

Introduction to Reaction Bonded Silicon Carbide

The process of improving the quality of porous steel billets, reducing pores, and sintering the final product with a specific strength and dimensional accuracy is called reaction-bonded silicon carbide, also referred to as self-bonded silicon carbide.

reaction bonded silicon carbide

Manufacturing Process of Reaction Bonded Silicon Carbide

Firstly, a specific ratio of graphite and α-SiC powder is combined.

The mixture is then heated to approximately 1,650°C to form a billet.

At the same time, silicon infiltrates or penetrates the steel billet through the gas phase or liquid phase.

In the billet, silicon reacts with graphite to form β-SiC, which combines with existing α-SiC particles.

A reaction-sintered body with full density and no size shrinkage is produced when silicon is fully infused.

Properties of Reaction Bonded Silicon Carbide

Alta dureza

Typically rated at 9 on the Mohs scale

Excellent Thermal Stability

Withstand temperatures up to approximately 1650°C (3000°F)

Resistencia al desgaste

Superior Wear Resistance

Chemical Resistance

Resistance acids and alkalis

Low Density

Approximately 3.10 to 3.15 g/cm³

Conductividad térmica

Typically ranging from 120 to 200 W/(m·K)


Typically less than 10%

Oxidation Resistance

Generally resist oxidation at temperatures up to 1600°C (2912°F)

Applications of Reaction Bonded Silicon Carbide

Mechanical Seals and Bearings:Pump Seals;Agitator Seals;Valve Bearings

Semiconductor Wafer Processing Equipment:Wafer Carriers and Susceptors;End Effectors

Abrasive and Grinding Media:Grinding Wheels and Discs;Cutting Tools

Automotive Components:Brake Discs and Pads; Turbocharger Components

Heat Exchanger Tubes: Chemical Processing

Reaction Bonded Silicon Carbide VS Sintered SiC

The ceramic forms of silicon carbide, namely Reaction Bonded Silicon Carbide (RBSC) and Sintered Silicon Carbide (SiC), are extensively acknowledged for their exceptional resilience to heat, hardness, and strength.

However because they are made using diverse production techniques, they have unique material qualities and are appropriate for varied uses.

Knowing the distinctions between Sintered SiC and RBSC can aid in the selection of the right material for particular applications.


Reaction Bonded Silicon Carbide

Carburo de silicio sinterizado


high density

higher density


less than 10% porosity

almost zero porosity


high Strength

higher Strength

Conductividad térmica

thermal conductivity is  variable

 consistent and high thermal conductivity


low in the manufacturing process

 longer processing times

Chemical Resistance

highly resistant to corrosion from acids, alkalis, and molten metals

more resistant to chemical attack, especially in high-temperature applications

Benefits and Advantages of Using Reaction Bonded Silicon Carbide

The benefits of reaction-bonded silicon carbide include high strength, low thermal expansion coefficient, good thermal conductivity, net size sintering (no size change before or after sintering), and ease of preparation for large, complex-shaped products.

Compared to hot pressing and pressureless sintered silicon carbide, the cost is significantly less.

reaction-bonded-silicon- carbide

This engineering ceramic material has a wide range of applications and is widely utilized in high-temperature valve parts, heat exchange parts, sliding bearings, mechanical seals, and other applications overseas.

In some specific applications, it has the unique advantages such as :

  • Regarding Wear Parts: The wear resistance of RBSC considerably prolongs the life of bearings, seals, and other parts, cutting down on maintenance expenses and downtime.
  • In High-Temperature Environments: Because of its stress resilience and thermal stability, it is perfect for parts that are exposed to high temperatures, such as burner nozzles and furniture used in kilns.
  • In Corrosive Environments: Even in harsh circumstances, the chemical inertness of RBSC guarantees the dependability and durability of parts in chemical processing machinery.


To sum up, reaction-bonded silicon carbide is a material solution of choice for difficult engineering applications since it provides strong benefits in terms of performance, longevity, and overall cost-efficiency.
To obtain a quote and service from us, please get in touch if you’re searching for superior silicon carbide.

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