Carbon composite products

Carbon-carbon composites and graphite

Carbon composite products

A lightweight, heavy-duty composite material that can withstand temperatures above 3000 ° C in different environments.
Carbon composite products

Carbon-carbon composites use the strength and modulus of carbon fibers, reinforcing the carbon matrix to withstand harsh extreme environments. Pyrocarbon, coke residues of thermosetting resins or oil pitch are used as a matrix, high-strength carbon fibers - filaments (continuous and chopped), bundles, fabrics, spatial fiber structures are used as filler fibers.

Advantages of Carbon composite products:

  • Low density;
  • High heat capacity;
  • Resistance to thermal shock, erosion and radiation;
  • Low coefficients of friction and linear expansion;
  • High corrosion resistance;
  • A wide range of electrical properties (from conductors to semiconductors);
  • High strength and rigidity;
  • Increased strength and elastic coefficient with increasing temperature.

Density

g/сm3

1.45-1.75

Thermal conductivity 1050 ° С

V/m*k

0.05-0.10

Compressive strength

МРа

200-300

Tensile strength

МРа

250-380

Elastic modulus

МРа

80

Ash content

%

≤0.05

Process temperature

°С

2400

Operating temperature

Air

°С<

≤400

Vacuum

≤2200

Inert gas

≤3200

Standard dimensions

мм

Пластина, диск 1000*1000

U-образное изделие (60*40*60)

L-образное изделие (65*65)

Soft graphite felt

Carbon-carbon composites and graphite

Soft graphite felt

We offer 2 types of graphite soft felt: - Carbon fiber based on polyacrylonitrile (PAN-based); - Carbon fiber based on viscose.
Soft graphite felt

PAN-based soft graphite felt

It is made on the basis of carbon felt from PAN fiber, which is subjected to a graphitization process.

Properties of soft graphite felt on a PAN basis:

  • High carbon content;
  • The ability to withstand heat without evaporation;
  • Corrosion resistance;
  • Low coefficient of thermal conductivity;
  • Usability.

Viscose-based soft graphite felt

It is made from viscose based on carbon fiber, which was first subjected to carbonization (at a temperature of 600-800 ° C), and then graphitization (at a temperature of 1500 to 2200 ° C).

Properties of soft graphite felt based on viscose::

  • High carbon content;
  • Corrosion resistance;
  • Resistance to thermal shocks;
  • Durability.

PAN-based soft graphite felt


Type

GFA

Density

g/сm3

0.12-0.14

Carbon content

%

≥99

Ash content

%

0.03

Thermal conductivity 1050 ° С

V/m*к

0.08

Process temperature

°С

2400

Operating temperature

Air

°С

≤400

Vacuum

°С

≤2200

Inert gas

°С

≤3200

Standard dimensions

Length

m

13-28

Width

m

1-1.2

Thickness

mm

5 , 10 , 12

Viscose-based soft graphite felt


Type

GFA

Density

g/cm3

0.08-0.10

Carbon content

%

≥99

Ash content

%

0.005

Thermal conductivity 1050 ° С

V/m*к

0.06

Process temperature

°С

2400

Operating temperature

Air

°С

≤400

Vacuum

°С

≤2200

Inert gas

°С

≤3200

Standard dimensions

Length

m

13-28

Width

m

1-1.2

Thickness

mm

5 , 10 , 12

Hard graphite felt

Carbon-carbon composites and graphite

Hard graphite felt

Hard graphite felt is a dimensionally stable insulation material made of graphite fibers and a carbon-based binder.
Hard graphite felt

To improve the thermal insulation properties, hard carbon felt is reinforced with carbon cloth and laminated with graphlex (graphite foil), which provides heat reflection to the inside of the furnace, and also serves as an obstacle for convection of hot gases. The resulting material undergoes a graphitization process.

Properties of hard graphite felt:

  • Corrosion resistance;
  • Thermal stability;
  • Air tightness;
  • Low coefficient of linear thermal expansion and thermal conductivity

Type

RFA, MFA, RFAC, RFACC, MFAC, MFACC

Density

g/cm3

0.16-0.20

Electrical resistance

Ω mm2*m

35-45

Ash content

ppm

≤300

Thermal conductivity

V/m*k

0.2

Process temperature

°С

2400

Operating temperature

Air

°С

≤400

Vacuum

°С

≤2200

Inert gas

°С

≤3400

Standard dimensions

Length

mm

1500-1700

Width

mm

1000-1250

Thickness

mm

20-240

Standard plate size

mm

1500*1000*40



Technological screens and furnace tools

Carbon-carbon composites and graphite

Technological screens and furnace tools

Due to their unique properties, products and parts made of carbon-carbon composite materials are widely used in the field of heat treatment as heat-resistant equipment for high-temperature furnaces.
Screens and tooling

A graphite felt cylinder is formed by combining graphite paper, carbon fiber and carbon fabric, which subsequently undergo subsequent high-temperature cleaning treatment.

Screen and tooling properties:

  • Corrosion resistance;
  • Thermal stability;
  • Air tightness;
  • Low coefficient of linear thermal expansion and thermal conductivity.

Density

g/cm3

0.16-0.20

Carbon content

%

≥99

Process temperature

°С

2300

External diameter

mm

200-1500

Thickness

mm

30-120

Height

m

300-2000




Carbon-carbon parts and fasteners

Carbon-carbon composites and graphite

Carbon-carbon parts and fasteners

Bolts, screws, nuts, studs and solid fasteners from UUKM for using in high temperature environments.
Parts and fasteners

Given the specific operating conditions of the product, in practice, a combination of various technological methods with high-temperature processing in an inert medium or vacuum is carried out, which allows you to change the structure of the material and adjust the pore volume. The strength of a carbonized carbon-carbon composite is proportional to density. Graphitization of a carbonized carbon-carbon composite material increases its strength.

Application fields for carbon-carbon composite materials and graphite:

Aircraft and rocket science: for parts of aircraft braking systems, in the manufacture of air intake elements, in returnable space objects for high-temperature thermal protection, as an element of nozzles of jet engines on solid fuel, in the manufacture of rocket nose fairings, etc.

Metallurgical industry: for the production of molds, for hot pressing of refractory metals and alloys.

Engineering: as bearings for friction units and o-rings, etc.

Nuclear power engineering: due to the high radiation resistance, products from carbon-carbon composite materials are used for core assemblies of high-temperature gas-cooled reactors, up to the use as core materials, etc.

Medicine: for the manufacture of reinforcing plates for joining bones in fractures, the manufacture of heart valves, implant teeth, hinge joints.

Electrical engineering: in high-temperature vacuum and gas-filled furnaces as a lining and thermal insulation, as heaters of various sizes during work associated with the release of corrosive metal vapors, as an insulating material in growth equipment, etc. This is not a complete list of the using areas of products from carbon-carbon composite materials and graphite, the possibilities of their application are very wide and constantly replenished.


Documents

Sanitary-Epidemiological Conclusion certificate of using sources Ionizing radiation
Sanitary-Epidemiological Conclusion certificate of using sources Ionizing radiation 2 pp.
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