Szczegóły publikacji
Opis bibliograficzny
Description of subcritical crack growth phenomenon in alumina-zirconia particulate composites using parameters determined by the constant stress rate test / Agnieszka DUDEK, Radosław LACH, Kamil WOJTECZKO, Zbigniew PĘDZICH // W: Brittle Matrix Composites 11 : [proceedings of the 11th international symposium on Brittle Matrix Composites (BMC-11) : Warsaw, September 28–30, 2015] / eds. Andrzej M. Brandt [et al.] ; Institute of Fundamental Technological Research. Polish Academy of Sciences. — Warsaw : IFTR, 2015. — ISBN: 978-83-89687-96-8. — S. 83–90. — Bibliogr. s. 90, Abstr.
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 93102 |
|---|---|
| Data dodania do BaDAP | 2015-09-30 |
| Rok publikacji | 2015 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Konferencja | Brittle Matrix Composites 11 |
Abstract
Ceramic elements should serve under loads, which are causing stresses lower than the critical ones. Even though these stresses are lower, flaws dimensions might be not stable. That is why, crack velocity determination is important for estimation of ceramics lifetime. Environmental factors, such as humidity or temperature, have a major impact on a material strength. It happens due to occurrence of the subcritical crack growth. It is commonly observed that failure stress of a material might be lower than the one predicted from the K-Ic factor determined in standard dynamic tests. Constant Stress Rate Test uses strength measurements at different stress rates to deduce subcritical crack growth parameters. Lower stress rate gives more time for flaws to grow. It follows that failure stress increases with increasing stress rate. Investigation was made for three composites: 5 vol. % of tetragonal zirconia isolated in the alumina matrix, alumina with 15 vol. % of tetragonal zirconia, which was a content near the percolation point and a typical duplex microstructure with a 50 vol. % of each phase. Alumina sinters were used as a reference material.
