Ceradyne Ceralloy® 147-31N Sintered Reaction Bonded Silicon Nitride (Si3N4)

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Ceradyne Ceralloy® 147-31N Sintered Reaction Bonded 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: Strength Hertzian Contact Strength Structural Reliability Net Shape Fabrication Applications: Automotive Components Bearings Wear Components Logging Tools Drilling components Measuring wheels Electrical Insulators Seal rings 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	Original Value	Comments

Density	3.20 g/cc
Porosity	0.00 %
Weibull Modulus	15 - 50

Mechanical Properties	Original Value	Comments
Vickers Microhardness	1450	HV (0.3); kg/mm²
Abrasive Hardness	825	Abrasive Wear Resistance Parameter
Modulus of Elasticity	310 GPa
Flexural Strength	700 - 800 MPa
Poissons Ratio	0.27
Fracture Toughness	6.00 MPa-m½
Shear Modulus	122 GPa	Calculated

Electrical Properties	Original Value	Comments
Electrical Resistivity	1.00e+16 ohm-cm
Dielectric Constant	8.0

Thermal Properties	Original Value	Comments
CTE, linear	3.10 µm/m-°C @Temperature 20.0 - 1000 °C
Thermal Conductivity	26.0 W/m-K

Descriptive Properties
Purity, %	92
Theoretical Density, %	>99.5
Thermal Shock Parameter, °C	610

**
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Silicon Nitride, reaction sintered

CCERDN42 / 720

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