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Nitride Bonded Silicon Carbide Ceramics


Nitride Bonded Silicon Carbide Ceramics



Silicon Nitride has the most versatile combination of mechanical, thermal, and electrical properties of any technical ceramic material. It is a high performance technical ceramic that is extremely hard and has exceptional thermal shock and impact resistance. It surpasses most metals high temperature capabilities and has a superior combination of creep and oxidation resistance. Additionally, its low thermal conductivity and high wear resistance make it an excellent material that can withstand the toughest of conditions in the most demanding industrial applications.



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