文献类型：期刊文献

中文题名：PICA-X的制备及其炭化前后性能研究

英文题名：Preparation and Properties of PICA-X Before and After Carbonization

作者：贾献峰[1];王际童[1];龙东辉[1];乔文明[1];凌立成[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2016

卷号：46

期号：6

起止页码：46

中文期刊名：宇航材料工艺

外文期刊名：Aerospace Materials & Technology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：PICA-X;炭化;力学性能;隔热性能

外文关键词：PICA-X; Carbonization; Mechanical property; Thermal insulation property

摘要：采用不同浓度热塑性酚醛树脂溶液浸渍莫来石纤维毡,经过溶胶-凝胶反应和常压干燥后,制备出酚醛浸渍陶瓷烧蚀体(PICA-X,0.45~0.50 g/cm^3),后研究了其炭化前后微观形貌、力学、隔热及抗氧化性能。结果表明:PICA-X具有莫来石纤维增强酚醛气凝胶复合结构,其弯曲强度为26.7~34.0 MPa,热导率为36~40 m W/(m·K)。经过1 000℃炭化后,C-PICA-X的弯曲强度为13.9~14.5 MPa,热导率为41~45m W/(m·K);PICA-X炭化前后均表现出较好的抗氧化性能。
Phenolic impregnated ceramic ablator（ PICA- X） were prepared by impregnation of novolac phenolic resin solutions into mullite fiber mat,followed by so-gel reaction and ambient drying. The density of the PICA- X could be adjusted in a range of 0. 45 to 0. 50 g / cm^3 by using different concentrations of novolac phenolic resin solutions. The microstructure,mechanical property,thermal insulation property and thermal stability of PICA- X before and after carbonization were systematically investigated. PICA- X,which are composed of phenolic aerogel reinforced by mullite fiber,exhibit excellent mechanical strength of 26. 7 to 34. 0 MPa and low thermal conductivity of 36 to 40 m W /（ m·K）. After carbonization at 1 000℃,the flexural strength and thermal conductivity of the resulting C- PICA- X are 13. 9 to 14. 5 MPa and 41 to 45 m W /（ m·K）,respectively. In addition,PICA- X exhibits good oxidation resistance before and after carbonization.