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Silicon Carbide (SiC)

 

 

Typical Silicon Carbide (SiC) Properties

SiC is an artificial (man-made) mineral known for its very high hardness and abrasion resistance. Common applications
include pump seals, valve components, and wear-intensive applications such as rollers and paper industry retainers.

 

Properties
Units
Test
Value
Physical
Chemical Formula
-
-
a-SiC
Density, r
g/cm3
ASTM C20
3.21
Color
-
-
dark gray
Crystal Structure
-
-
hexagonal
Water Absorption
% @R.T.
ASTM C373
0.0
Hardness
Moh's
-
9 - 10
Hardness
knoop (kg/mm2)
Knoop 100g
2800
Mechanical
Compressive Strength
MPa @ R.T.
ASTM C773
1725 - 2500
Tensile Strength
MPa @ R.T.
ACMA Test #4
310
Modulus of Elasticity
(Young's Mod.)
GPa
ASTM C848
476
Flexural Strength (MOR)
MPa @ R.T.
ASTM F417
324
Poisson's Ratio, u
ASTM C818
0.19
Fracture Toughness, KIc
MPa x m1/2
Notched Beam Test
4.0
Thermal
Max. Use Temperature
(* denotes inert atm.)
ºC
No load cond.
1400
Thermal Shock Resistance
DT (ºC)
Quenching
350 - 500
Thermal Conductivity
W/m-K @ R.T.
ASTM C408
41
Coefficient of Linear Thermal Expansion, al
mm/m-ºC (~25ºC through ±1000ºC)
ASTM C372
5.12
Specific Heat, cp
cal/g-ºC @ R.T.
ASTM C351
0.15
Electrical
Dielectric Constant
1MHz @ R.T.
ASTM D150
10.2
Dielectric Strength
kV/mm
ASTM D116
-
Electrical Resistivity
Wcm @ R.T.
ASTM D1829
108