Open AccessOPTIMIZATION OF STRUCTURE OF CARBON-CARBON COMPOSITE MATERIALS FOR IMPROVING OXIDATIVE RESISTANCE FOR USE IN HIGH-TEMPERATURE DESIGNS
Author(s) -
С. А. Колесников
Publication year - 2018
Publication title -
izvestiâ vysših učebnyh zavedenij. himiâ i himičeskaâ tehnologiâ/izvestiâ vysših učebnyh zavedenij. seriâ himiâ i himičeskaâ tehnologiâ
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.221
H-Index - 5
eISSN - 2500-3070
pISSN - 0579-2991
DOI - 10.6060/tcct.20165909.28y
Subject(s) - oxidizing agent , carbon fibers , materials science , graphite , reinforced carbon–carbon , composite number , oxygen , porosity , weight change , water vapor , chemical engineering , composite material , thermal oxidation , chemistry , organic chemistry , weight loss , medicine , layer (electronics) , engineering , obesity
Constructional graphite including carbon-carbon composite materials has developed bulk porous structure, which renders a significant impact on all physical-mechanical, thermal and chemical properties of parts of them. At the oxidation of carbon materials it defines the influence of activity of oxidizing agent (oxygen, carbon dioxide or water vapor), temperature process conditions and the development of a real surface of burning. So in the process of oxidation of СССM samples at keeping fairly constant of external geometry up to the oxidation rate (up to ~ 30% of weight loss) the increase in current rate of mass loss by a factor of 1.5 order of magnitude is usually pointed out. This is a result of the internal porous reacting and development of heterogeneous surface of oxidation. Such a significant change in the oxidation rate is commensurate with the influence of oxidation temperature change of process on 70… 150 °С. In this work for a number of industrial СССM the limiting the absolute rate of oxidation of carbon material was considered taking into account the structure of the pore space.