Influence of oxidation on fatigue life of a carbon/silicon carbide composite in water vapor containing environments
| Autor: | Xingang Luan, Hui Mei, Chidong Liu, Laifei Cheng |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Process Chemistry and Technology Diffusion Composite number chemistry.chemical_element Surfaces Coatings and Films Electronic Optical and Magnetic Materials Residual strength Stress (mechanics) chemistry.chemical_compound chemistry Oxidizing agent Materials Chemistry Ceramics and Composites Silicon carbide Composite material Carbon Water vapor |
| Zdroj: | Ceramics International. 35:1397-1402 |
| ISSN: | 0272-8842 |
| Popis: | The influence of oxidation on the fatigue life of two-dimensional carbon/silicon carbide composites in water vapor containing environments at 1300 °C was investigated. Tension–tension fatigue experiments were conducted at sinusoidal frequency of 3 Hz. Using a stress ratio ( σ min / σ max ) of 0.1, specimens were subjected to peak fatigue stresses of 90, 120 and 150 MPa. The mean residual strength of the specimens after survived 100,000 cycles with a peak stress of 90 MPa was 83.9% of that of the as-received composite. The mean fatigue lives of the specimens subjected to peak fatigue stresses of 120 and 150 MPa were 42,048 and 13,514 cycles, respectively. Oxidation was the dominant damage mechanism, which remarkably decreased the fatigue life. Oxidizing species diffusion within the composite defects was discussed. The higher the applied stresses, the larger the equivalent radius of the defect and the shorter the fatigue life. |
| Databáze: | OpenAIRE |
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