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Silicon Carbide Bearings, SiC Bearing(SSiC), Sintered pressureless bonded sic Bearings

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The properties of pressureless sintered silicon carbide ceramic products

•High temperature strength ---It can be used reliably in the air even when the temperature exceeds 1600°C (under inert gas and vacuum, the maximum temperature can reach 2000°C) •Hardness---SSiC is a high-performance material second only to diamond and cubic boron nitride

•Wear resistance---ultra-high hardness and density make it ideal for parts often subject to high wear

•Thermal shock resistance---Due to the high thermal conductivity and low thermal expansion coefficient, it has excellent thermal shock resistance, and compared with other refractory materials, it performs better in rapid thermal cycling

•Corrosion, oxidation and erosion resistance--- high density, low porosity and chemical inertness make it work well in hot gas and liquid environments, oxidizing and corrosive gases, and strong acids and alkalis even at ultra-high temperatures

•High thermal conductivity--- it has the equivalent thermal conductivity of graphite material, and 5 times of alumina

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Product Information

Silicon carbide (SiC) has excellent thermal conductivity, corrosion resistance, and low thermal expansion. Silicon carbide is an excellent ceramic material for applications requiring good erosion and abrasive resistance. Silicon carbide is an ideal material for sealing rings and bearings. ATT Advance Ceramics Division supplies rings and bearings made by SiC as well as other SiC parts. Bearings made from other ceramic materials, such as ZrO2 and Si3N4 are also available.


methanidylidynesilicon; Carborundum; Silicon monocarbide; Betarundum Carborundeum; carbon silicide; Green densic

Silicon Carbide Bearing (SSiC) Specifications


Per your request or drawing

We can customized as required


The physical properties of pressureless sintered silicon carbide ceramics products

Physical propertiesUNITSSIC
(Composition:SiC)vol %≥ 98
Density 20°Cg/cm³>3.10
Open PorosityVol %0
(Hardness) 45NR45N93
(Hardness) HV1kg/mm²2350
(Flexural Strength 20°C)MPa320-400
(Flexural Strength1300°C)MPa360-410
Coefficient of thermal expansion10-6K-14
(Thermal Conductivity 20°C )Wm -1K-1116
(Thermal Conductivity 1200°CWm -1K-135
(Modulus of Elasticity @ RT )GPa410
Thermal shock resistance )
(Max. Service Temp (air) )°CApprox. 1600
Electrical ResistivityΩ-m1 to 4 10x
Specific HeatJ/kg-K670 to 1180
Tensile StrengthMPa (Ultimate)210 to 370
Young's ModulusGPa370 to 490
Exact Mass
Monoisotopic Mass

Corrosion test results in liquids

Test Environment             mg/cm2 yr)*  Corrosive Weight Loss

(wt%)Conc. ReagentTemp. (˚C)Sintering SiC (NO Free S i)Reaction Bonded SiC (12%Si)Tungsten Carbide (6% Co)Aluminum Oxide (99%)
85%H 3 PO 4100<0.28.855.0>1000
70%HNO 3100<0.20.5>10007.0
10%HF plus NO 325<0.2>1000>100016.0

Test Time:125 to 300 hours of submersive testing, continuously stirred.

Corrosion Weight Loss Guide:

>1000 mg/cm2 yr      Completely destroyed within days.

100 to 999 mg/cm2 yr   Not recommended for servicegreater than a month

50 to 100 mg/cm2 yr     Not recommended for servicegreater than one year

10 to 49 mg/cm2 yr        Caution recommended, basedon the specific application.

0.3 to 9.9 mg/cm2 yr       Recommended for long term service

<2mg/cm2 y     Recommended for long term service; no corrosion, other than as a result of surface cleaning, was evidenced.


Comparison of Technical Data for Different Silicon carbide material

Max. Service Temp   (air)138016501650
Densityg/cm³≥3.02≥ 3.102.60-2.74
Bulk Densityg/cm32.73.13
Open Porosity%< 0.1015
Bending StrengthMpa250 (20℃ )380100
Mpa280 (1200 ℃)370120
Modulus of   ElasticityGpa330 (20℃ )350240
Gpa300 (1200 ℃)300200
Thermal   ConductivityW/m.k40 (1200 ℃)3510
Coefficient of   Thermal ExpansionK -1 × 10-
Appearance Porosity
SiC Content%859898.5
Si Content%1500
Compressive   strength MPa21002200>300
Flexural strengthMPa110400380
Acid Alkaline-proof
Main   characteristics
Chemical ResistanceFracture ToughnessHigh temp. High   resistance.
  High purity


-High hardness, Mohs hardness rating of 9

-High thermal conductivity

-High-temperature strength

-Its electrical conductivity between that of metals and insulating materials

-Wear resistant

-Corrosion resistant


– Low Density

-High Young’s modulus

-Low thermal expansion coefficient

-Resistance to chemical reaction and thermally resistant

-Outstanding thermal shock resistance

-Refractive index greater than a diamond

Applications of Silicon Carbide Bearing

– A promising substitute for traditional semiconductors such as silicon in high-temperature applications.

-Grinding wheels and abrasive paper and cloth products

-High-temperature bricks and other refractories

-Abrasive and cutting tools

-Structural material

-Automobile parts

-Electronic circuit elements

 -Thin filament pyrometry

-Catalyst support


Packing of Silicon Carbide Bearing

Standard Packing:

Sealed bags in carton boxes. Special package is available on request.

As a ceramic material, Silicon Carbide is quite fragile in a lot of cases. The Silicon Carbide Bearing are usually held in plastic bags by vacuum, and protected with heavy foam.

ATTs’ Silicon Carbide Bearing is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

Chemical Identifiers

Linear   FormulaSiC
MDL   NumberMFCD00049531
EC   No.206-991-8
Beilstein/Reaxys   No.N/A
Pubchem   CID9863
IUPAC   Namemethanidylidynesilicon
InchI   IdentifierInChI=1S/CSi/c1-2

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