State Corporation AO Rosatom

Moscow, Russia

State Corporation AO Rosatom

Moscow, Russia
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Kolesnikov S.A.,State Corporation AO Rosatom | Bamborin M.Y.,State Corporation AO Rosatom | Vorontsov V.A.,State Corporation AO Rosatom | Protsenko A.K.,State Corporation AO Rosatom | Cheblakova E.G.,State Corporation AO Rosatom
Refractories and Industrial Ceramics | Year: 2017

Carbon material thermal conductivity is an important factor for providing thermal shock resistance. The effect of production factors on the reproducibility of thermal conductivity values during manufacture of three-dimensional reinforced high-density carbon-carbon composite is considered. An average level of thermal conductivity applies to more than 82% of workpieces. From 4.6 to 12.5% of workpieces have thermal conductivity not less than 44 and not more than 70 W/(m·K). It is established that a change in carbon fiber treatment temperature from 1600 to 2400°C may lead to an increase in materials thermal conductivity by 0.21 W/(m·K) for each 100°C. Adifference in framework structure may change average thermal conductivity within the limits of 3 W/(m·K). Variation of material apparent density from 1.89 to 1.98 g/cm3 gives a change in thermal conductivity by 1.1 W/(m·K) for each +0.1 g/cm3. A connection is established for a carbon-carbon composite of electrical conductivity ρ and thermal conductivity λ, corresponding in form to the Weidemann-Franz rule λρ = const. © 2017 Springer Science+Business Media, LLC

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