Silicon Carbide Bearing Description
Silicon carbide (SiC) is a lightweight ceramic material with high strength properties comparable to diamond. It has excellent thermal conductivity, low thermal expansion, and is resistant to corrosion from acids.
Silicon carbide is an ideal material for sealing rings and bearings. It has good corrosion resistance, great mechanical strength under high temperatures, and excellent wear resistance. We can supply ring and bearing products made by SiC as well as other SiC parts.
Silicon Carbide Bearing Specification
| |
Value
|
|
Inner Diameter (ID)
|
4~100mm
|
|
Outer Diameter (OD)
|
ID + 5~40mm
|
|
Length/Thickness
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4~34mm
|
|
Material
|
SiC, ZrO2, Si3N4
|
Reaction Bonded & Sintered SiC Bearing
Silicon carbide ceramic maintains its high mechanical strength in temperatures as high as 1,400C. It has higher chemical corrosion resistance than other ceramics. SAM offers a complete family of fully dense silicon carbide bearings. These materials have the following key characteristics:
| Material Properties |
Unit |
Reaction Bonded SiC Bearing |
Sintered SiC Bearing |
| Density |
gm/cc |
3.1 |
3.15 |
| Crystal Size (Average) |
Microns |
12 |
43169 |
| Color |
¯ |
Black |
Black |
| Flexural Strength (MOR) 20°C |
MPa (psi x 103) |
462 (67) |
480 (70) |
| Elastic Modulus 20°C |
GPa (psi x 106) |
393 (57) |
410 (59) |
| Poisson’s Ratio 20°C |
¯ |
0.2 |
0.21 |
| Compressive Strength 20°C |
MPa (psi x 103) |
2700 (363) |
3500 (507) |
| Hardness |
GPa (kg/mm2) |
26 (2500) |
26 (2800) |
| Tensile Strength 25°C |
MPa (psi x 103) |
307 (44.5) |
– |
| Fracture Toughness K(I c) |
Mpa m1/2 |
4 |
4 |
| Thermal Conductivity 20°C |
W/m K |
125 |
150 |
| Coefficient of Thermal Expansion 25-1000°C |
X 10-6/°C |
4.3 |
4.4 |
| Specific Heat 100°C |
880 J/kg*K |
800 |
800 |
| Thermal Shock Resistance ΔTc |
℃ |
400 |
300 |
| Maximum Use Temperature |
℃ |
1000 |
1600 |
Silicon Carbide Bearing Applications
Silicon carbide bearing is an excellent material for applications requiring good erosion and abrasive resistance. Consequently, it is useful in a variety of applications including spray nozzles, shot blast nozzles, and cyclone components.
Silicon Carbide Bearing Packaging
Our silicon carbide bearings are carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Silicon Carbide Bearing FAQs
Q1: What are the key properties of silicon carbide bearings?
A: Key properties include high hardness, excellent wear resistance, high thermal conductivity, chemical inertness, low thermal expansion, and high temperature stability.
Q2: What sizes and configurations are available for silicon carbide bearings?
A: Silicon carbide bearings are available in a variety of sizes and configurations, including radial bearings, thrust bearings, and custom designs to meet specific application requirements.
Q3: How do silicon carbide bearings compare to traditional metal bearings?
A: Silicon carbide bearings offer superior wear resistance, higher temperature stability, and better chemical resistance compared to traditional metal bearings. However, they can be more brittle and expensive. The choice depends on the application's specific demands and operating conditions.
