Material response characterization of a low-density carbon composite ablator in high-enthalpy plasma flows
Source abstract
Abstract
Future space exploration missions beyond Earth’s orbit, such as sample returns from Mars, will use ablative materials for the thermal protection system in order to shield the spacecraft from the severe heating during reentry. In this paper, we present the results of an elaborate test campaign on a lightweight carbon composite ablator with the aim of defining a procedure for material response characterization in a 1.2-MW inductively heated Plasmatron facility, suitable to reproduce the hypersonic flight boundary layer environment. Three different test gases were used, air, nitrogen, and argon, at surface temperatures exceeding 3300 K. A comprehensive experimental setup was developed including a nonintrusive technique to measure surface recession by means of a high-speed camera. Surface degradation was strongly test gas dependent, while mass loss was mainly driven by in-depth decomposition of phenolic resin. Emission spectroscopy helped us identify C2 as a product of dissociating hydrocarbons, as well as cyanogen, suggesting surface nitridation. Melt flow at the surface and silicon emission indicated degradation of the glass microspheres used as additional filler. In air plasma, oxidation was inferred to be the main mechanism for ablation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Dynamics and Kinetic Theory · Diamond and Carbon-based Materials Research · Plasma and Flow Control in Aerodynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (58)
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