固体火箭技术2024，Vol.47Issue(3)：388-396,9.DOI:10.7673/j.issn.1006-2793.2024.03.012
可陶瓷化EPDM绝热材料的烧蚀特性及陶瓷化机理
Ablation characteristics and ceramization mechanism of ceramifiable EPDM insulation
蔺自斌 1王明超 1汪远 2何永祝 1常凯 3任雯君2
作者信息
- 1. 航天化学能源全国重点实验室,襄阳 441003||湖北航天化学技术研究所,襄阳 441003
- 2. 湖北航天化学技术研究所,襄阳 441003
- 3. 湖北航天化学技术研究所,襄阳 441003||武汉理工大学 材料科学与工程学院,武汉 430070
- 折叠
摘要
Abstract
The characteristics of carbonized layer in thermal insulation are closely related to its ablation resistance.Through characterization and analysis of structure and composition of carbonized layer of ceramicable EPDM insulation after oxygen-acetylene ablation,the correlation among different parameters of linear ablation rate of insulation layer and carbonized layer was obtained,and the formation mechanism of carbonized ceramic-like layer was analyzed.The results show that when the content of ceramifiable sili-cone resin filler is 35～40 phr,the carbonized layer possesses denser structure,higher hardness,smaller porosity and more ceramic products,which effectively improve the ablative resistance of EPDM insulation layer.There is a strong correlation between the linear ablation rate of the insulating layer and structure,composition of the carbonized layer.The formation of ceramic-like carbonized layer structure can be divided into four stages:thermal decomposition of polymer,chemical vapor deposition of small molecules,in-situ formation of SiC on ablated surface,filling and bonding of molten SiO2 in carbonized layer.Finally,a kind of Si—O—C composite ce-ramic structure is formed.关键词
绝热层/EPDM/陶瓷化/炭化层/烧蚀特性Key words
insulation/EPDM insulation/ceramization/char layer/ablation characteristics分类
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蔺自斌,王明超,汪远,何永祝,常凯,任雯君..可陶瓷化EPDM绝热材料的烧蚀特性及陶瓷化机理[J].固体火箭技术,2024,47(3):388-396,9.
