文章信息/Info

Title:

Evolution of the Structure and Performance of Carbon Fibers at High Temperatures

作者:

馮志海; 李同起; 楊云華; 楊曉光; 李秀濤; 徐樑華; 呂春祥

（航天材料及工藝研究所 先進(jìn)功能復(fù)合材料技術(shù)重點(diǎn)實(shí)驗(yàn)室，北京 100076）
（北京化工大學(xué)，北京 100029）��
（中國科學(xué)院山西煤炭化學(xué)研究所，山西 太原 030001）

Author(s):

FENG Zhihai;  LI Tongqi;  YANG Yunhua;  YANG Xiaoguang;  LI Xiutao;  XU Lianghua;  LU Chunxiang

(Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China)��
(Beijing University of Chemical Technology, Beijing 100029, China)��
(Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China)

關(guān)鍵詞:

碳纖維; 燒蝕防熱; 復(fù)合材料; 碳/碳

DOI:

10.7502/j.issn.1674-3962.2012.08.02

文獻(xiàn)標(biāo)志碼:

A

摘要:

針對碳纖維在碳/碳燒蝕防熱復(fù)合材料中應(yīng)用的基礎(chǔ)問題，論述了不同碳纖維結(jié)構(gòu)、成分、表面特征，及其力學(xué)性能和熱物理性能的高溫演變規(guī)律，揭示了碳纖維灰分含量對碳纖維力學(xué)性能和熱氧化性能的影響。確定了在碳/碳復(fù)合材料復(fù)合成型過程中，碳纖維結(jié)構(gòu)受基體碳影響的變化規(guī)律和碳纖維表面特征對碳/碳材料宏觀力學(xué)性能的影響。闡明了碳/碳復(fù)合材料中碳纖維的力學(xué)性能對纖維發(fā)生折斷燒蝕的阻礙作用和通過控制碳/碳成型最高溫度實(shí)現(xiàn)提高性能的途徑。

Abstract:

To resolve the basic application problems of carbon fibers in ablative heat protection composites, the high temperature revolution of the structures, elemental contents and surface features of carbon fibers were discussed and their mechanical and thermal physical properties were also given. The influence of ash content on the mechanical and anti oxidation properties of carbon fibers was disclosed. The microstructure development of carbon fibers, influenced by carbon matrix, was determined during the formation process of C/C composites. The mechanical performance of C/C composite was influenced by the surface features of the carbon fibers used as the raw materials. The carbon fibers with high mechanical performance can prevent their fracture during ablation. By control the maximum heat treat temperature during the manufacture of C/C composites, their mechanical performance can be increased.