Formation of Carbon-Carbon Composite Material Thermal Conductivity Standardsстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 июля 2022 г.
Аннотация: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 center dot K). It is established that a change in carbon fiber treatment temperature from 1600 to 2400A degrees C may lead to an increase in materials thermal conductivity by 0.21 W/(m center dot K) for each 100A degrees C. Adifference in framework structure may change average thermal conductivity within the limits of 3 W/(m center dot K). Variation of material apparent density from 1.89 to 1.98 g/cm(3) gives a change in thermal conductivity by 1.1 W/(m center dot K) for each +0.1 g/cm(3). A connection is established for a carbon-carbon composite of electrical conductivity rho and thermal conductivity lambda, corresponding in form to the Weidemann-Franz rule lambda rho = const.