Thermal-deformation curves for carbonized carbon plastics at elevated temperatures

Abstract

1. QGCP shows thermal expansion on heating; an increase in the heating rate produces an increase in the relative value of the thermal deformation in the working temperature range in neutral and oxidizing media. 2. An increase in the number of heating-cooling cycles with a constant heating rate reduces the thermal deformation no matter what the nature of the gas medium, where the reduction in the relative maximum deformation in a neutral medium is not more than 0.3%, as against 0.1% for an oxidizing medium, in each case in terms of the deformation in the previous test. 3. An increase in the number of heating cycles in this temperature and time range produces the same changes in the thermal deformation as a reduction in the heating rate in the first test, which means that the necessary heating rate for a single thermal loading can be selected in order to determine the thermal deformation of carbon plastic under repeated loading.