轻质碳酚醛复合材料烧蚀实验及分析

In this paper, the ablation experiment for low-density carbon/phenolic composites was conducted by using oxygen acetylene radiation heating system. The thermal deformation of specimen surface was measured by digital image correlation system (DIC). The real-time temperature history of specimens was monitored by the thermocouple placed the different depth from heating surface of specimen. The ablation morphology and microstructure of the composites after heating experiment were observed and analyzed. It is found that the recession displacement of the composite under the condition of 100s radition heating process is 1.5 mm. The porosity of the composites near the heating surface becomes large. The peak temperature of the composites from the heating surface 30mm reached 464.1℃, which represents the composites with good thermal insulation performances. Displacement field distribution of samples was obtained by the digital image correlation (DIC) method, the displacement of the distance from the heating surface 4.1 mm was 1.33mm,and decreased nonlinearly along the heating direction.