文献类型：期刊文献

中文题名：刚性短切碳纤维预制体和酚醛浸渍碳烧蚀体的制备及性能

英文题名：Preparation and Properties of Rigid Carbon Fiber Preform and Resulting Phenolic Impregnated Carbon Ablator

作者：杨威[1];贾献峰[1];乔文明[1];凌立成[1];龙东辉[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：2

起止页码：13

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：酚醛浸渍碳烧蚀体;短切碳纤维预制体;低密度热防护材料;压缩强度;导热性能

外文关键词：Phenolic impregnated carbon ablator; Rigid carbon fiber preform; Low-density thermal protection material; Compressive strength; Thermal conductivity

摘要：以短切碳纤维、热固性酚醛树脂为原料,经真空成型得到短切碳纤维预制体(Fiberform),再以Fiberform为骨架、酚醛树脂溶液为浸渍液,经反应干燥得到酚醛浸渍碳烧蚀体(PICA)。结果表明:Fiberform具有明显的各向异性,当Fiberform的密度由0.13 g/cm^3增大到0.18 g/m^3时,其纵向压缩强度由0.10 MPa增大到0.39 MPa,横向压缩强度由0.33 MPa增大到0.79 MPa。PICA具有酚醛气凝胶/碳纤维复合型结构,其密度可以通过控制酚醛树脂溶液浓度来调节。当PICA的密度由0.27 g/cm^3增大到0.43 g/cm^3,其纵向压缩强度由0.45 MPa增大到2.42 MPa,横向压缩强度由1.36 MPa增大到3.12 MPa。PICA的隔热性能与Fiberform相近,其纵向和横向热导率分别为0.08和0.11 W/(m·K)。
The rigid carbon fiber preform（ Fiberform） was prepared by vacuum molding using chopped carbon fibers as the raw material and thermal-setting phenolic resin powder as the cross-linking agent. The resulting Fiberform was further impregnated with phenolic resin solution through reaction and drying process,to obtain phenolic impregnated carbon ablator（ PICA）. Fiberform consists of interconnected chopped carbon fiber oriented preferentially in the horizontal direction,making it a transverse isotropic material with different material properties. The longitudinal compressive strength and transverse compressive strength were varied from 0. 10 to 0. 39 MPa and 0. 33 to 0. 79 MPa,respectively,depending on the density of Fiberform. PICA had an aerogel-like composite structure consisting of phenolic nanoparticles and carbon fiber network. The density of PICA could be controlled from 0. 27 to 0. 43 g/cm^3 by changing the concentration of phenolic resin solution. The longitudinal and transverse compressive strengths of PICA were therefore adjusted from 0. 45 to 2. 42 MPa and from 1. 36 to 2. 27 MPa,respectively. The PICA had the similar thermal insulation with the Fiberform,0. 08 W/（ m·K） in through-the-thickness and 0. 11 W/（ m·K） in-plane directions.