CARBON-CARBON COMPOSITES MADE FROM RAYON BASED GRAPHITE FABRIC “URAL”
COMPOSITES PROPERTIES
- Specific gravity 1.4 g/cm3 (PAN-CF - 1.7 g/cm3 );
- Stability in inert (oxidizer-free) ambience is 3000 C max;
- Stability in oxidizer ambience 400-450 C max; short-term – 1500 C;
- Insensitivity to electromagnetic, nuclear and space radiation;
- Filament Tensile Strength 1.2 - 1.5 GPa;
- Average Tensile Modulus 60 GPa;
- High elasticity;
- High chemical stability to acids, alkalis, solvents (at normal & high temperatures);
- Electrical conductivity.
APPLICATION. Examples are based on present state of knowledge we have. Material’s unique properties allow other problems also to be solved. It is a reason of close cooperation with users and processing companies when needed.
- Carbon-carbon composites for heat insulation;
- High temperature insulation. Asbestos replacement. CVD/CVI composites. Vacuum furnace heat insulation. Crystal pullers;
- Corrosion resistant lining;
- Sliding bearings for shipbuilding;
- Rigid electrical heaters;
- Radiowave absorption materials (EMI shielding)
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FACTORY FACILITIES |
Composite basket: crucible holder (solar grade silicon) | |
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Solid rocket motor nozzle case |
Sliding bearing |
Carbon-carbon screw |
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INFRA-RED HEATER (UNDER OPERATION) | ||
PROPERTIES OF CARBON-CARBON VERSUS GRAPHITE.
CARBON-CARBON MADE FROM GRAPHITE FABRIC “URAL”
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Material type | |||
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Graphite 1 |
Graphite 2 |
Carbon-carbon |
Carbon-carbon | |
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Specific gravity, g / cm3 |
1.55-1.60 |
1.8-1.9 |
1.43-1.49 |
1.4-1.5 |
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Strength at 20 º C, MPa |
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compressive |
60-100 |
160-400 |
50-140 |
150-400 |
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flexural |
30-70 |
30-70 |
70-170 |
100-160 |
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tensile |
20-30 |
25-35 |
40-140 |
50-120 |
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Thermal conductivity, W / m K |
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20 º C |
90-130 |
10-80 |
n.d. |
5-7 |
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500 º C |
70-75 |
10-60 |
30-32 |
7-11 |
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1000 º C |
50-55 |
15-60 |
n.d. |
10-15 |
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CTE α , 10-6 / º C |
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20-1000 ºÑ |
7-8 |
4-5 |
1-7 |
3-4 |
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20-1500 ºÑ |
8-9 |
4.5-5.5 |
n.d. |
3.5-4.5 |
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Porosity η, % |
26 |
6-8 |
n.d. |
4-7 |
* Parallel to fiber axis
GRAPHITE FABRIC URAL™ SPECIFICATION
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TYPE OF FABRIC → |
TM-4 |
T-P |
T-2 |
T-8S |
T-1 |
T-0.5 |
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Count of thread ends per 5 cm: |
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Warp |
195 |
98 |
98 |
140 |
98 |
110 |
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Weft |
120 |
70 |
65 |
100 |
70 |
80 |
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Surface density, gms/m2 |
1100±100 |
335±30 |
300±30 |
290±30 |
170±20 |
120±20 |
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Width of the fabric, cm |
50±5 |
50±5 |
42±4 |
50±5 |
55±5 |
55±5 |
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Thickness, mm |
1.7-1.9 |
0.45-0.65 |
0.40-0.60 |
~ 0.33 |
0.25-0.35 |
0.14-0.20 |
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Breaking strength, N / 5 cm |
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Warp |
2940 |
981 |
900 |
900 |
750 |
500 |
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Weft |
686 |
343 |
300 |
300 |
250 |
200 |
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Ash content, % |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
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Specific resistance, Ohm, max |
0.3 |
0.5 |
0.5 |
0.5 |
1.0 |
1.5 |
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Humidity, %, max |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
1.0 |
̉̀-4 is 4-layer fabric, layers are bonded by linen weaving repeating.
̉-Đ is twill weave 2x2 fabric. ̉-1 - twill weave 2x2. ̉-2 - linen weave 1x1. T-8S - 8 harness satin.
TEMPERATURE OF GRAPHITATION: 2200 ºC
Fabric is on paper roll ( 60 mm diameter min ).
Roll length is 700±30 mm. In every roll only 1 (one) piece of fabric.
Fabric weight: 5 kg min; 3 kg weight is allowed for 10% of pieces in the lot.
Roll of fabric is wrapped into polyethylene (PE) film and then packed into cardboard box.
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CARBON-CARBON HI-TEMP HEATER |
HOT ZONE COMPONENTS |
“Artificial” bone (prosthetic device) |
