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Silicon Carbide Ceramics


Silicon Carbide Ceramics


Silicon Carbide is one of the lightest, hardest, and strongest technical ceramic materials and has exceptional thermal conductivity, resistance to acids, and low thermal expansion. Silicon Carbide is an excellent material to use when physical wear is an important consideration because it exhibits good erosion and abrasive resistance, making it useful in a variety of applications such as nozzles, seals components etc


Chemical Composition and Physical Properties

Index

RSIC

NSIC

SISIC

Bulk density(g/cm3)

2.60-2.74

2.75-2.82

>3.02

Porosity (%)

15

10-12

<0.1

Compression strength(MPa)

≥600

600-700

 

Bending strength(MPa)

90-100(20)

 

250(20)

100-120(1100)

160-180(1100)

280(1200)

Young’s modulus(GPa)

280(20)

220-260

 

Thermal conductivity(W/MK)

26(1200)

15(1200)

45(1200)

Thermal expansion(20-1000 oC) 10-6k-1

4.8

5.0

4.5

Max. working temperature(oC)

1650

1500

1380

Moh’s scale of thermal expansion

 

 

13

Si3N4(%)

0

20-30

 

a-SIC(%)

98.5

70-80