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>> Sic and ssic mechanical seal faces or rings
 
They have the property of excellent resistant-corrosion,high mechanical strength,high thermal conductivity,good self-lubrication,used as seal faces,bearings and tubes in spacecraft,machinery,metallurgy,printing and dyeing,foodstuff,phamaceutical,auto industry and so on.When the sic faces are combined with graphite faces the friction is the smallest and they can be made into mechanical seals which are able to work in highest working requirements.

SiC physical property

Technical Parameter

Unit

SiC

SSiC

Sic+C

Ssic+C

Qssic+C

Hardness

HS

110

115

105

110

100

Porosity Rate

%

<0.3

<0.2

<0.5

<0.5

<5

Density

g/cm3

3.00~3.05

>3.10

2.69-2.90

2.70-3.0

2.65

Compressive Strength

MPa

>2200

>2500

>1400

>1600

>800

Fractural Strength

MPa

>350

>380

>150

>160

>100

Coefficient of Heat Expansion

10-6/oC

4

4.2

3.50

3.00

2.50

Content of Sic

%

90

98

85

92

90

Free Si

%

10

1

12

/

/

Elastic Modulus

GPa

400

410

350

360

180

Temperature

oC

1300

1400

1300

1400

1400

 
 



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