Microstructure and gas-surface interaction studies of a low-density carbon-bonded carbon fiber composite in atmospheric entry plasmas

被引：59

作者：

Helber, Bernd ^{[1
,2
]}

Chazot, Olivier ^{[1
]}

Hubin, Annick ^{[2
]}

Magin, Thierry E. ^{[1
]}

机构：

[1] von Karman Inst Fluid Dynam, B-1640 Rhode St Genese, Belgium

[2] Vrjie Univ Brussel, B-1050 Elsene Brussel, Belgium

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2015年 / 72卷

基金：

欧洲研究理事会;

关键词：

Carbon-carbon composites (CCC); High-temperature properties; Ablation; Surface analysis; BOUNDARY-LAYER; ABLATION; OXIDATION; GRAPHITE; BEHAVIOR; SUBLIMATION; PROTECTION; OXYGEN;

D O I：

10.1016/j.compositesa.2015.02.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon-bonded carbon fiber (CBCF) composites are a cost-effective solution for the production of low-density carbon-phenolic Thermal Protection Systems (TPS). This new TPS for spacecraft requires new experimental data for model development and validation. Ablation experiments of a CBCF composite were carried out in an inductively-coupled plasma generator to assess the performance in high-enthalpy flows. Surface temperatures up to 2900 K led to strong surface ablation and test samples of hemispherical shape responded with constant surface temperatures and recession rates. Cylindrical samples experienced a continuous surface temperature increase. Emission spectra of the cyano radical CN were indicative of a 4-5 mm reactive boundary layer. Deviation from thermal equilibrium was found by comparison to simulated spectra. Micrographs revealed an oxidation zone in the order of 0.2 mm at the surface, suggesting a gas phase diffusion controlled ablation regime. Strong corrosion of the fibers in nitrogen plasma is attributed to wall nitridation. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：96 / 107

页数：12

共 56 条

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