Evolution of microstructures and thermal properties with heat treatment for absorbing, emitting and scattering fibrous medium

被引：1
作者：
Zhao, S. Y. [1 ]
He, X. D. [1 ]
Zhang, B. M. [2 ]
Du, S. Y. [1 ]
机构：
[1] Harbin Inst Technol, Ctr Composite Mat, Harbin 150080, Peoples R China
[2] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2011年 / 71卷 / 03期
基金：
中国博士后科学基金;
关键词：
Glass fibers; Environmental degradation; Thermal properties; Heat treatment; RADIATIVE PROPERTIES; FIBER MATERIALS; MULLITE; INSULATION; DEVITRIFICATION; CONDUCTIVITY; KINETICS;
D O I：
10.1016/j.compscitech.2010.12.021
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
The microstructure changes of a fibrous insulation for thermal protection system were examined before and after thermal exposures at different temperatures between 1000 degrees C and 1400 degrees C. The consequent thermal properties, i.e., thermal conductivity, extinction coefficient, albedo of scattering, and linear coefficient of phase function at different stages were measured by using a developed experimental device and data processing method. The effects of microstructure changes on the thermal properties degradation were discussed. It was found that the devitrification of mullite and the microstructure changes induced by heat treatment had a significant influence upon the thermal properties, and higher temperature treatment yielded a strong increase in thermal conductivity of fibrous insulation. The results also indicated that the relative contribution of conductive and radiative heat transfer would be re-regulated after high temperature thermal annealing. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：415 / 423
页数：9
相关论文
共 42 条
  • [1] ALEXANDER L., 1948, Anal. Chem, V20, P886, DOI [10.1021/ac60022a002, DOI 10.1021/AC60022A002]
  • [2] BANKVALL C, 1973, J TEST EVAL, V1, P235, DOI 10.1520/JTE10010J
  • [3] Thermal conductivity of highly porous mullite material
    Barea, R
    Osendi, MI
    Ferreira, JMF
    Miranzo, P
    [J]. ACTA MATERIALIA, 2005, 53 (11) : 3313 - 3318
  • [4] BELYAKOVA P, 1981, INORG MATER, V17, P948
  • [5] Bhattacharya R.K., 1980, American Society of Testing and Materials, V718, P272, DOI DOI 10.1520/STP29279S
  • [6] Studies on a probable correlation between thermal conductivity, kinetics of devitrification and changes in fiber radius of an aluminosilicate ceramic vitreous fiber on heat treatment
    Bhattacharyya, AK
    Choudhury, BN
    Chintaiah, P
    Das, P
    [J]. CERAMICS INTERNATIONAL, 2002, 28 (07) : 711 - 717
  • [7] Fine diameter ceramic fibres
    Bunsell, AR
    Berger, MH
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2000, 20 (13) : 2249 - 2260
  • [8] Chen R.R., AIAA20020504
  • [9] *CHIN NAT STAND, 179112006 GBT CHIN N
  • [10] Experimental investigations of the coupled conductive and radiative heat transfer in metallic/ceramic foams
    Coquard, R.
    Rochais, D.
    Baillis, D.
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2009, 52 (21-22) : 4907 - 4918
12345