Carbon/carbon composite

Carbon reinforced carbon composites are primarily composed of carbon. The purity of these composites is very great as they are manufactured at temperatures of well over 2000°C. The ash content is 600 ppm. A rate of only 10 ppm can also be reached through post-purification.

Carbon/Carbon composites have a high degree of resistance to bending and are thus well suited to loaded systems, flat heating elements as well as screws and nuts for aeronautics.

Principal characteristics

  • High dimensional stability and mechanical strength up to 2700°C (using inert gas or in a vacuum)
  • High resistance to thermal shocks
  • Excellent resistance to alternating loads even at high temperatures
  • High degree of purity
  • Increase of stability with increasing temperatures
  • Good corrosion resistance at high temperatures
  • Low density
  • Low thermal expansion coefficient
  • Resistance to vibrations
  • Electrical conductivity

4 types of C/C composites

  • Standard grade
  • Premium grade
  • Performance grade (for load surfaces)
  • Mechanical grade (for fastenings)

Standard and Performance grades

The Standard grade C/C composites are made of woven carbon. They are available in plates or as profiles.

Premium grade

Also made of woven carbon, these composites are designed for components which will have a high stress-level. They are highly-rigid semi-finished sheets.

Properties

Properties of C/C materials

 

Standard

Premium

Performance

Mechanical

Density

g/cm³

1.45

1.50

1.50

1.50

Flexural strength,

MPa

140-180

240-300

200

100

Young’s modulus, //

GPa

60-70

70-85

70

28

Tensile strength, //

MPa

300-350

320-400

-

65

Ash content

ppm

1000

1000

1000

1000

Ash content (purified grade)

ppm

<10

<10

<10

<10

Max. temperature

Inert atmosphere or vacuum

°C

2000

2000

2000

2000

┴ perpendicular measurement

// parallel measurement

Graphite (1.11M)

Technical data sheet graphite.