Abstract
A lightweight heat shield material can be built by using a fully carbonized ablator. The ablator studied here is a completely carbonized two-layered Phenolic carbon fiber reinforced plastic (CFRP) prepared as thinly as possible. A virgin layer of the ablator is heavy compared with a carbonized layer. Therefore, the ablator of a conventional method with the virgin layer becomes heavier than the completely carbonized ablator. In this study, surface temperatures of the completely carbonized ablator become large compared with the conventional method's temperatures. However, the surface recession of completely carbonized ablator does not have great difference compared with the conventional method. The surface recession can be analyzed using Metzger's equations and experimental correction coefficients. This is the reason that the recession in the diffusion controlled oxidation region (approximately 700 K to 3000 K) dose not depend on surface temperature strongly.
