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http://dx.doi.org/10.6108/KSPE.2022.26.6.021

Enhanced Oxidation Resistance of LSI-Cf/SiC Composite by De-siliconization  

Jung Hwan Song (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
Jung Hoon Kong (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
Seung Yong Lee (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
Young Il Son (Agency for Defense Development)
Do Kyung Kim (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.26, no.6, 2022 , pp. 21-27 More about this Journal
Abstract
Cf/SiC composites have low density, high mechanical strength, and good thermal stability, making them promising materials for high-temperature applications such as rocket propulsion and military fields. However, the remaining Si deteriorates physical and thermal properties. In this paper, the de-siliconization was introduced as a method to remove the Si of the Cf/SiC composite fabricated through Liquid Silicon Infiltration(LSI) process. The stability of composite has been tested under an oxyacetylene torch flame for up to 5 minutes. The oxidized surface and cross section of specimens were characterized by 3D scanning, X-ray diffraction(XRD), Optical microscope(OM) and Scanning electron microscope(SEM).
Keywords
$C_f/SiC$ Composite; Liquid Silicon Infiltration; De-Siliconization; Oxidation Resistance;
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