Fabrication and properties of Cf/ZrC‐SiC‐based composites by an improved reactive melt infiltration

Cf/ZrC‐SiC composites with a density of 2.52 g/cm3 and a porosity of 1.68% were fabricated via reactive melt infiltration (RMI) of Si into nano‐porous Cf/ZrC‐C preforms. The nano‐porous Cf/ZrC‐C preforms were prepared through a colloid process, with a ZrC “protective coating” formed surrounding the...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2018-08, Vol.101 (8), p.3253-3258
Main Authors: Ni, De‐Wei, Wang, Jing‐Xiao, Dong, Shao‐Ming, Chen, Xiao‐Wu, Kan, Yan‐Mei, Zhou, Hai‐Jun, Gao, Le, Zhang, Xiang‐Yu
Format: Article
Language:English
Subjects:
Carbon fiber reinforced plastics
Carbon fibers
Colloiding
Composite materials
composites
Infiltration
mechanical properties
Modulus of elasticity
Porosity
Preforms
Protective coatings
reactive melt infiltration
UHTCs
Zirconium carbide
ZrC
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Summary:Cf/ZrC‐SiC composites with a density of 2.52 g/cm3 and a porosity of 1.68% were fabricated via reactive melt infiltration (RMI) of Si into nano‐porous Cf/ZrC‐C preforms. The nano‐porous Cf/ZrC‐C preforms were prepared through a colloid process, with a ZrC “protective coating” formed surrounding the carbon fibers. Consequently, highly dense Cf/ZrC‐SiC composites without evident fiber/interphase degradation were obtained. Moreover, abundant needle‐shaped ZrSi2 grains were formed in the composites. Benefiting from this unique microstructure, flexural strength, and elastic modulus of the composites are as high as 380 MPa and 61 GPa, respectively, which are much higher than Cf/ZrC‐SiC composites prepared by conventional RMI.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.15534