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Silicon carbide ceramics

Ceramic based on silicon carbide (SiC) provides products with high heat resistance and the highest performance. The main advantages are the resistance of the material to temperature extremes, high corrosion resistance and stable product dimensions.

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Items manufactured from refractory metals and alloys

Ceramic products based on silicon carbide (SiC)

Description Specifications

SiC ceramics have been widely used in the automotive and aerospace industries as an abrasive semiconductor structural high-temperature material for the production of engine parts and thermal installations, as well as electronics.

Areas of use:

Accessories and constructional elements of high-temperature furnaces;

Nozzles for various purposes and burner tops, retorts;

Covers for thermocouples, heat-resistant pipes;

Crucibles, glasses, sleeves of various configurations;

Friction pairs;

Heaters;

Elements of thermal combustion plants, etc.

Material Advantages:

High mechanical strength;

High hardness;

Resistance to thermal shock;

High wear resistance in conditions of abrasive wear and elevated temperatures;

Resistance to corrosion and oxidation;

High resistance to aggressive environments;

High electrical conductivity;

Low coefficient of thermal expansion + high thermal conductivity = high heat resistance, stability of geometric characteristics;

High chemical resistance.

NPO GKMP LLC offers a variety of ceramic parts based on silicon carbide (sintered SSiC, reaction sintered SiSiC, recrystallized RSiC and oxide-bonded OSiC) of various sizes according to customer size.

The non-oxide ceramic silicon carbide (SiSiC)

Name	Measure	Value
Use temperature	⁰С	1380
Density	g/cm³	≥3.02
Open porosity	%	≤0.1
Bending strength	MPа	250(20°С) 280 (1200°С)
Elastic modulus	GPа	300(1200°С) 330(20°С)
Thermal conductivity	W / mK	45(1200°С)
Rigidity	13
Resistance to acid and alkali	High

Sintered Silicon Carbide (SSiC)

Name	Measure	Value
Silicon free	%	<0.1
Silicon carbide	%	≥99
Bulk density	g/cm³	3.1-3.15
Vickers hardness	НV	2500
Rockwell hardness	НRA	94
Open porosity	%	<0.2
Compressive strength	MPа	>3000
Bending strength	MPа	>400
Elastic modulus	GPа	410
Thermal conductivity	W / mK	100-120

Recrystallized SiC (RSiC)

Name	Measure	Value
α- SiC	%	98.5
Maximum operating temperature	⁰С	1650
Porosity	%	15
Bulk density	g/cm³	2.60-2.74
Compressive strength	MPа	≥600
Bending strength	MPа	90-100
Young's module	GPа	240
Thermal conductivity	W / mK	24

Oxide Bounded Silicon Carbide (OSiC)

Name	Measure	Value
SiC	%	≥90
Maximum operating temperature	⁰С	1550
Open porosity	%	7-8
Bulk density	g/cm³	2.75
Bending strength	kg/сm²	≥1300
Tensile strength at room temperature	kg/cm²	≥500

Nitrogen-bonded silicon carbide (NSiC)

Name	Measure	Value
SiC content	%	≥75
Si3N4 content	%	≥21
Fe2O3 content	%	≤0,5
Maximum operating temperature	°С	1550
Porosity	%	≤15
Density	g/cm3	2,6-2,7
Compressive strength	MPа	≥180
Bending strength (20 ° C)	MPа	≥45
Bending strength (1200 ° C)	MPа	≥50
Thermal conductivity (800 ° C)	W/m·К	≥18
Thermal conductivity (1200 ° C)	W/m·К	≥14

NPO GKMP LLC supplies a variety of custom-made parts of different types and features made of ceramic based on silicon carbide (sintered silicon carbide (SSiC), non-oxide ceramic silicon carbide (SiSiC), recrystallized silicon carbide (RSiC), oxide bounded silicon carbide (OSiC), nitrogen-bonded silicon carbide (NSiC) in accordance with the dimensions and drawings of the customer.