Análise microscópica pós-queima do material do inserto da tubeira de motor foguete a propelente sólido:

In part I of this work the procedure of preparation of samples and important concepts were presented, such as ablation in the motor tubing and also that of ablative and re-radiative thermal protections. In part II, (presented in the this study), the characterization by stereo microscopy, optical microscopy and scanning electron microscopy (SNAM) of the CRFC composite used as an insert in the tubing of the S43 engine was performed in the post-burning condition. The analysis by optical microscopy, performed in the region around the throat section, showed that the erosion of the sample was more pronounced on the surface than that observed in the regions farther from the passage of the gas flow. The scanning electron microscopy, performed in the region around the throat section, provided a more in-depth analysis of the morphology of the composite material, allowing to identify details of the reinforcing rods, such as carbon fiber filaments and, in the pyrolytic carbon matrix, the different lamellae deposited by CVD.