Pressureless Sintered Silicon Carbide
Pressureless sintered silicon carbide is a grade of silicon carbide. It has the lowest strength compared to the other variants of silicon carbide. The graph bars on the material properties cards below compare pressureless sintered silicon carbide to other non-oxide engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Compressive (Crushing) Strength
3680 MPa 530 x 103 psi
Elastic (Young's, Tensile) Modulus
420 GPa 61 x 106 psi
Flexural Strength
480 MPa 70 x 103 psi
Fracture Toughness
3.9 MPa-m1/2 3.5 x 103 psi-in1/2
Knoop Hardness
2810
Poisson's Ratio
0.19
Tensile Strength: Ultimate (UTS)
210 MPa 30 x 103 psi
Thermal Properties
Maximum Temperature: Mechanical
1590 °C 2900 °F
Maximum Thermal Shock
300 °C 570 °F
Specific Heat Capacity
740 J/kg-K 0.18 BTU/lb-°F
Thermal Conductivity
120 W/m-K 71 BTU/h-ft-°F
Thermal Expansion
4.4 µm/m-K
Vicat Softening Temperature
300 °C 570 °F
Other Material Properties
Density
3.1 g/cm3 200 lb/ft3
Electrical Resistivity Order of Magnitude
2.6 10x Ω-m
Common Calculations
Stiffness to Weight: Axial
74 points
Stiffness to Weight: Bending
80 points
Strength to Weight: Axial
19 points
Strength to Weight: Bending
25 points
Thermal Diffusivity
53 mm2/s
Thermal Shock Resistance
8.3 points
Followup Questions
Further Reading
Properties of Silicon Carbide, Gary L. Harris (editor), 1995
Silicon Carbine Ceramics: Fundamental and Solid Reaction, Shigeyuki Somiya and Yoshizo Inomata (editors), 1991
Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing and Applications, Hugh O. Pierson, 1996
Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012
Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005
Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010