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Crack-healing in ytterbium silicate filled with silicon carbide particles.
- Source :
-
Journal of the European Ceramic Society . Dec2020, Vol. 40 Issue 15, p5740-5748. 9p. - Publication Year :
- 2020
-
Abstract
- A study on the influence of the silicate composition on the self-healing ability of a promising environmental barrier coating (EBC) material is reported. The EBC material consists of silicon carbide particles dispersed in a ytterbium silicate matrix. The composition of the silicate was varied from pure monosilicate to pure disilicate including a mixture of 50 vol-% of both phases. Pre-cracked specimens were mechanically tested before and after thermal annealing in air at 1400 °C accompanied by microstructural investigations. It is shown, that the self-healing mechanism is based on the application of compressive surface stresses due to graded oxidation of the SiC particles. With increasing amount of disilicate strength and self-healing ability increase. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SILICON carbide
*YTTERBIUM
*SILICATES
*PARTICLES
Subjects
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 40
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 145118454
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2020.06.032