Addition of carbon fibers into B4C infiltrated with molten silicon
| Autor: | Ievgen Solodkyi, Petro Loboda, O. Bezdorozhev, Petre Badica, I. Bogomol, M. Vterkovskiy, V. Bolbut, Manja Krüger |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Molten silicon Process Chemistry and Technology Composite number 02 engineering and technology Boron carbide 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Flexural strength chemistry 0103 physical sciences Materials Chemistry Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 45:168-174 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.09.148 |
| Popis: | Boron carbide added with 0–20 wt% carbon fibers was subject to Si infiltration. Samples mainly consist of B13C2, β-SiC and unreacted Si. Some amount of SiB6 and α-SiC was also detected, while formation of B12(B,C,Si)3 phase was suppressed due to short infiltration time. The carbon fibers react with Si and result in formation of a composite core-shell fiber with SiC-shell and C-core. Theoretical estimations suggest that these composite fibers have a strong influence on the enhancement of the bending strength. Although apparently in good agreement with experimental data showing an increase of bending strength up to 510 ± 27 MPa in the sample with 10 wt% carbon fiber, the implications of phase changes with the carbon fiber amount has to be carefully considered. At higher amounts of carbon fibers, bending strength decreases. |
| Databáze: | OpenAIRE |
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