Abstract
In the present studies, silicon based low-density ablative material has been studied for its ablative performance to protect flight hardware from temperature raises due to aerodynamic forces for a longer duration. The oxyacetylene flame test estimates ablative properties at 100–120 W/m2 heat flux. The time duration for the flame test is taken 200 s. The material shows low mass and linear ablation rate with high ablative effectiveness. The degradation kinetics of silicon ablator is studied by Thermo Gravimetric Analysis (TGA) method. Non-isothermal TGA is performed in the temperature range of 30 °C to 900 °C at various heating rates, viz. 5, 10, 15, and 20 °C/ min. Knowledge of the kinetic parameters of thermal decomposition is used to predict the degradation kinetics of the material at high heating rates, which the ablator faces during aerospace applications. During ablation, the silicone ablative material consists of a virgin zone, reaction zone, and char zone. These are explained by kinetic parameters determined with the help of free software called Kinetic Calculation.
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The authors thank the GITAM and DRDL management for their encouragement to carry out this study.
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Mrs. Sujatha Maddu and Mrs. Tanu Srivastava carried out all experimental analyses and mathematical modeling of thermal properties in this research paper. Dr. Naresh Kumar Katari participated in designing the work and drafting the manuscript. Dr. Karuna Sree Merugu performed the statistical analysis. Prof. Rambabu Gundla did the theoretical analysis and reviewed the manuscript. Dr. S. Krishna Mohan helped in comparing theoretical and experimental test results. All authors read and approved the manuscript.
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Maddu, S., Srivastava, T., Katari, N.K. et al. Studies on Ablative Performance of Silicone Low-Density Ablative Material. Silicon 15, 3599–3608 (2023). https://doi.org/10.1007/s12633-023-02289-7
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DOI: https://doi.org/10.1007/s12633-023-02289-7