3M Techical Ceramics Ekatherm® Silicon Nitride

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3M Techical Ceramics Ekatherm® Silicon Nitride
Categories:	Ceramic; Carbide
Material Notes:	Information provided by 3M Technical Ceramics, formerly ESK Ceramics.
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Physical Properties	Metric	English	Comments

Density	>= 3.24 g/cc	>= 0.117 lb/in³	DIN EN 623-2
Porosity	<= 0.50 %	<= 0.50 %	DIN EN 623-2
Grain Size	<= 2.0 µm	<= 2.0 µm
Weibull Modulus	15	15	[m]; DIN EN 843-5

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	15 @Pressure 100 MPa	15 @Pressure 14500 psi	DIN EN 843-4
Hardness, Vickers	15 @Pressure 1000 MPa	15 @Pressure 145000 psi	DIN EN 843-4
Tensile Modulus	300 GPa	43500 ksi	Young's; DIN EN 843-2
Flexural Strength	700 MPa	102000 psi	4-pt bending; DIN EN 843-1
Compressive Strength	>= 2500 MPa	>= 363000 psi	DIN 51104
Poissons Ratio	0.28	0.28	DIN EN 843-2
Fracture Toughness	7.00 MPa-m½	6.37 ksi-in½	SENB

Electrical Properties	Metric	English	Comments
Electrical Resistivity	>= 1.00e+11 ohm-cm	>= 1.00e+11 ohm-cm	DIN EN 50359

Thermal Properties	Metric	English	Comments
CTE, linear	2.50 µm/m-°C @Temperature 25.0 - 500 °C	1.39 µin/in-°F @Temperature 77.0 - 932 °F	DIN EN 821-1
	3.90 µm/m-°C @Temperature 500 - 1000 °C	2.17 µin/in-°F @Temperature 932 - 1830 °F	DIN EN 821-1
Specific Heat Capacity	0.650 J/g-°C	0.155 BTU/lb-°F	C DIN EN 821-3
Thermal Conductivity	27.0 W/m-K	187 BTU-in/hr-ft²-°F	DIN EN 821-2

Descriptive Properties
Thermal Stress	27 W/mm		R2= R1-λ
	672 K		R1 = sB·(1-ν)/(α·E)

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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CESK13 / 183305

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