Influence of Matrix Modification on the Oxidation Resistance of SiC/SiC Composites
Abstract
SiC/SiC composites were prepared by precursor infiltration and pyrolysis process combined with three matrix modification methods. The effect of matrix modification on the high temperature oxidation resistance of SiC/SiC composites was analyzed by morphology analysis and mechanical property test. The results showed that the flexural strength of the matrix-modified composites hardly decreases after 100h static oxidation at 1200℃. After 200h oxidation, the retention rates of flexural strength reached 80%. After 300h oxidation, the internal structure of the composites was not oxidized and the oxidation degree of the interface layer in the surface area decreases. The B element in the modified matrix was oxidized to form liquid phase to seal the surface of SiC coating, which delayed the oxidation process of SiC coating, preventing the oxidation medium from entering the interior of the compo-site and protects the fiber and interface layer, so that the long-term static oxidation resistance of SiC/SiC composites was improved significantly.
References
WEN Q, YU Z, RIEDEL R. The Fate and Role of in Situ Formed Carbon in Polymer-Derived Ceramics[J]. Prog. Mater Sci, 2020, 109: 100623.
ZHAO H, CHEN L, LUAN X, et al. Synthesis, Pyrolysis of a Novel Liquid SiBCN Ceramic Precursor and Its Application in Ceramic Matrix Composites[J]. J. Eur. Ceram. Soc., 2017, 37(4): 1321-1329.
RUGGLES-WRENN M B, LEE M. Fatigue Behavior of an Advanced SiC/SiC Ceramic Composite with a Self-Healing Matrix at 1300℃ in Air and in Steam[J]. Mater. Sci. Eng., A, 2016, 677: 438–445.
RUGGLES-WRENN M B, LEE M, CHRISTENSEN D T, et al. Effect of Frequency and Environment on Fatigue Be-havior of a CVI SiC/SiC Ceramic Matrix Composite at 1200℃[J]. Compos. Sci. Technol., 2011, 71(2): 190-196.
LAMOUROUX F, BERTRAND S, PAILLER R, et al. Oxidation-Resistant Carbon-Fiber-Reinforced Ceramic-Matrix Composites[J]. Compos. Sci. Technol., 1999, 59(7): 1073-1085.
LAMOUROUX F, BERTRAND S, PAILLER R, et al. A Multilayer Ceramic Matrix for Oxidation Resistant Carbon Fibers-Reinforced CMCs[J]. Key Eng. Mater., 1998, 164-165: 365-368.
XU Y, CHENG L, ZHANG L, et al. Morphology and Growth Mechanism of Silicon Carbide Chemical Vapor Deposited at Low Temperatures and Normal Atmosphere[J]. J. Mater. Sci., 1999, 34(3): 551-555.
VICKRIDGE I, GANEM J, HOSHINO Y, et al. On SiC by Dry Thermal Oxidation: Mechanisms[J]. J. Phys. D: Appl. Phys., 2007, 40(20): 6254-6263.
KURT A TERRANI, BRUCE A PINT, CHAD M PARISH, et al. Silicon Carbide Oxidation in Steam up to 2 MPa[J]. J. Am. Ceram. Soc., 2014, 97(8): 2331-2352.
MERGIA K, LAFATZIS D, MOUTIS N, et al. Oxidation Behaviour of SiC Coatings[J]. Appl. Phys. A, 2008, 92(2): 387-395.
LIANG BIN, YANG ZHIHUA, JIA DECHANG, et al. Amorphous Silicoboron Carbonitride Monoliths Resistant to Flowing Air up to 1800℃[J]. Corros. Sci., 2016, 109: 162-173.
MÜLLER A, GERSTEL P, WEINMANN M, et al. Correlation of Boron Content and High Temperature Stability in Si–B–C–N Ceramics[J]. J. Eur. Ceram. Soc., 2000, 20(14-15): 2655-2659.
MCFARLAND B, OPILA E J. Silicon Carbide Fiber Oxidation Behavior in the Presence of Boron Nitride[J]. J. Am. Ceram. Soc. Society, 2018, 101(12): 5534–5551.
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