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http://dx.doi.org/10.3795/KSME-A.2016.40.11.927

Fracture Characteristics of C/SiC Composites for Rocket Nozzle at Elevated Temperature  

Yoon, Dong Hyun (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Lee, Jeong Won (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Kim, Jae Hoon (Dept. of Mechanical Engineering, Chungnam Nat'l Univ.)
Sihn, Ihn Cheol (Dai-Yang Industries Co.)
Lim, Byung Joo (Dai-Yang Industries Co.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.40, no.11, 2016 , pp. 927-933 More about this Journal
Abstract
In a solid propulsion system, the rocket nozzle is exposed to high temperature combustion gas. Hence, choosing an appropriate material that could demonstrate adequate performance at high temperature is important. As advanced materials, carbon/silicon carbide composites (C/SiC) have been studied with the aim of using them for the rocket nozzle throat. However, when compared with typical structural materials, C/SiC composites are relatively weak in terms of both strength and toughness, owing to their quasi-brittle behavior and oxidation at high temperatures. Therefore, it is important to evaluate the thermal and mechanical properties of this material before using it in this application. This study presents an experimental method to investigate the fracture behavior of C/SiC composite material manufactured using liquid silicon infiltration (LSI) method at elevated temperatures. In particular, the effects of major parameters, such as temperature, loading, oxidation conditions, and fiber direction on strength and fracture characteristics were investigated. Fractography analysis of the fractured specimens was performed using an SEM.
Keywords
C/SiC Composite; Oxidation; Uniaxial Compression; Uniaxial Tension; SEM;
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Times Cited By KSCI : 2  (Citation Analysis)
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