Effect of Y2O3/La2O3 Proportion on the Mechanical Properties of Cf/SiC Composites

Yun Long Zhang; Yu Min Zhang; Ming Hu; Jin Ping Li

doi:10.4028/www.scientific.net/AMR.971-973.63

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 971-973Effect of Y2O3/La2O3 Proportion on the Mechanical...

Effect of Y₂O₃/La₂O₃Proportion on the Mechanical Properties of C_f/SiC Composites

Abstract:

In this paper, the commercial α-SiC powder and bargain price La₂O₃/Y₂O₃ additives were utilized to fabricate SiC matrix composites. The influence of the Y₂O₃/La₂O₃molar proportion on the microstructure, mechanical properties of the C_f/SiC composites were researched. The results showed that La₂O₃/Y₂O₃ additives could not enhance mechanical properties for the C_f/SiC composites distinctly. The flexural strength for the C_f/SiC composites with different Y₂O₃/La₂O₃ proportion was higher than 250MPa. The multi-toughening mechanics including grain bridge, crack deflection and fiber pullout were responsible for improvement of fracture toughness.

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Periodical:

Advanced Materials Research (Volumes 971-973)

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63-66

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https://doi.org/10.4028/www.scientific.net/AMR.971-973.63

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June 2014

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Yun Long Zhang*, Yu Min Zhang, Ming Hu, Jin Ping Li

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