Ceradyne Ceralloy® 147-A Hot Pressed Silicon Nitride (Si3N4)

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Ceradyne Ceralloy® 147-A Hot Pressed Silicon Nitride (Si3N4) (discontinued **)
Categories:	Ceramic; Nitride
Material Notes:	Ceralloy® 147 Reaction Bonded Silicon Nitride (RBSN) is a high purity grade of silicon nitride. RBSN has excellent thermal shock resistance and outstanding compatibility with non-ferrous molten metals. This lower cost alternative to the fully dense silicon nitride grades can be manufactured to close tolerance without the need for expensive diamond grinding. Features: High Purity Excellent Mechanical Properties Applications: Semiconductor Components Wear Components Information provided by Ceradyne, Inc. Ceradyne was acquired by 3M in 2012. The product line has been extensively renamed and reconfigured.
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Physical Properties	Metric	English	Comments

Density	3.18 g/cc	0.115 lb/in³
Porosity	0.00 %	0.00 %
Weibull Modulus	10 - 20	10 - 20

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	1650	1650	HV (0.3); kg/mm²
Abrasive Hardness	860	860	Abrasive Wear Resistance Parameter
Modulus of Elasticity	310 GPa	45000 ksi
Flexural Strength	700 MPa	102000 psi
Poissons Ratio	0.23	0.23
Fracture Toughness	4.50 MPa-m½	4.10 ksi-in½
Shear Modulus	126 GPa	18300 ksi	Calculated

Electrical Properties	Metric	English	Comments
Electrical Resistivity	1.00e+16 ohm-cm	1.00e+16 ohm-cm
Dielectric Constant	9.0	9.0

Thermal Properties	Metric	English	Comments
CTE, linear	3.20 µm/m-°C @Temperature 20.0 - 1000 °C	1.78 µin/in-°F @Temperature 68.0 - 1830 °F
Thermal Conductivity	42.0 W/m-K	291 BTU-in/hr-ft²-°F

Descriptive Properties
Purity, %	>99.4
Theoretical Density, %	>99.5
Thermal Shock Parameter, °C	517

**
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CCERDN43 / 721

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