Experimental Investigation on the Specific Heat of Carbonized Phenolic Resin-Based Ablative Materials
 作者： Te Zhao,  Hong Ye,  Lisong Zhang,  Qilin Cai 作者单位： 1University of Science and Technology of China2Beijing Institute of Space Long March Vehicle 刊名： International Journal of Thermophysics, 2017, Vol.38 (10) 来源数据库： Springer Nature Journal DOI： 10.1007/s10765-017-2286-7 关键词： Carbon/phenolic composite;  Carbonized ablators;  3D DSC;  High silica/phenolic composite;  Specific heat; 原始语种摘要： As typical phenolic resin-based ablative materials, the high silica/phenolic and carbon/phenolic composites are widely used in aerospace field. The specific heat of the carbonized ablators after ablation is an important thermophysical parameter in the process of heat transfer, but it is rarely reported. In this investigation, the carbonized samples of the high silica/phenolic and carbon/phenolic were obtained through carbonization experiments, and the specific heat of the carbonized samples was determined by a 3D DSC from 150 $$^{\circ }\hbox {C}$$ to 970 $$^{\circ }\hbox {C}$$ . Structural and compositional characterizations were performed to determine the mass fractions of the fiber and the carbonized product of phenolic which are the two constituents of the carbonized samples, while... the specific heat of each constituent was also measured by 3D DSC. The masses of the carbonized samples were reduced when heated to a high temperature in the specific heat measurements, due to the thermal degradation of the carbonized product of phenolic resin in the carbonized samples. The raw experimental specific heat of the two carbonized samples and the carbonized product of phenolic resin was modified according to the quality changes of the carbonized samples presented by TGA results. Based on the mass fraction and the specific heat of each constituent, a weighted average method was adopted to obtain the calculated results of the carbonized samples. Due to the unconsolidated property of the fiber samples which impacts the reliability of the DSC measurement, there is a certain deviation between the experimental and calculated results of the carbonized samples. Considering the similarity of composition and structure, the data of quartz glass and graphite were used to substitute the specific heat of the high silica fiber and carbon fiber, respectively, resulting in better agreements with the experimental ones. Furthermore, the accurate specific heat of the high silica fiber and carbon fiber bundles was obtained by inversion, enabling the prediction of the specific heat of the carbonized ablators with different constituent mass fractions by means of the weighted average method in engineering.

• carbonized　碳化的
• carbonization　碳化酌
• phenolic　苯酚的
• silica　硅土
• obtain　获得
• DSC　3270 information Display System data-stream Compatibility
• resin
• composite　复合的
• specific
• constituent　成分