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Comparison on Microstructure and Infrared Emissivity Properties of 3D Needled Composites
Author(s) -
Wang Fuyuan,
Cheng Laifei,
Fan Xiaomeng,
Yin Xiaowei,
Zhang Litong
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12284
Subject(s) - emissivity , materials science , infrared , microstructure , composite material , low emissivity , optics , layer (electronics) , physics
Three‐dimensional (3D) needled composites, C/C, C/C‐SiC, and C/SiC, were prepared and their infrared emissivity properties in 1000–1600°C were investigated. Results showed that the infrared emissivity of all composites increased almost linearly with temperatures. In comparison with C/C, C/C‐SiC composites reduced by 10% in the total emissivity. Twenty‐two vol% SiC in C/C‐SiC composites caused a low zone in 10–14 μm, corresponding to the theoretical emissivity of SiC. For C/SiC composites prepared by CVI , 68 vol% SiC caused a “V” shape in the spectral emissivity. The high SiC content also endued the high infrared emissivity properties for C/SiC composites.