Aerospace-grade Si3N4 ceramic components, resistant to 1400°C high temperature, military quality assurance

Customized Silicon Nitride Ceramic Parts

Silicon nitride ceramics (Si₃N₄) are one of the structural ceramic materials with the best comprehensive performance today. With its ultra-high strength, thermal shock resistance and excellent mechanical stability, it has become the preferred material in the aerospace, high-end equipment and new energy fields....

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SISIC(RBSIC/REFEL) Properties
Item	Unit	Typical Values
Physical Properties
Color		Grey Black
Density	g/cm3	3.04
Silicon Carbide Content	%	82-83
Mechanical Properties
Moh's Hardness		9.15
Vickers Hardness HV	Kg / mm2	3000
Flexural Strength	Mpa（20°C）	250
Flexural Strength	Mpa（1200°C）	280
Compressive Strength	GPa @ ambient	2.9
Modulus of Elasticity	Mpa（20°C）	330
Modulus of Elasticity	Mpa（1200°C）	300
Fracture Toughness	MPa m1/2	4
Poissons Ratio		0.24
Thermal Properties
Maximum Working Temperature	°C	1380
Thermal Conductivity	W/m.K	150
Thermal Expansion Coefficient	10-6/°C	4.5
Electrical Properties
Electric Resistivity	Ωm	10

Core material properties

Extreme mechanical properties

Bending strength: 800-1200 MPa (HIP sintering process)

Fracture toughness: 6-7.5 MPa·m¹/² (twice that of alumina ceramics)

Vickers hardness: 1600-1800 HV

Extraordinary thermal performance

Maximum operating temperature: 1400°C (under oxidizing environment)

Thermal expansion coefficient: 3.2×10⁻⁶/°C (perfect match with bearing steel)

Thermal conductivity: 15-30 W/(m·K)

Application fields

1. Aerospace

Engine parts: turbine rotor blades, combustion chamber liners

Satellite systems: ceramic bearings for inertial navigation systems

Supersonic aircraft: thermal protection ceramic matrix composites

2. Energy equipment

Wind power systems: megawatt-class generator insulation ceramic rings

Nuclear power components: ceramic joints for spent fuel processing manipulators

Photovoltaic manufacturing: thermal field materials for polycrystalline silicon ingot furnaces

3. Precision machinery

High-speed bearings: DN values exceeding 3×10⁶ mm·r/min

Metal forming: ceramic separation rings for continuous casting

Semiconductor equipment: wafer transfer robot arm components

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