Flexural creep of zirconium diboride–silicon carbide up to 2200°C in minutes with non-contact electromagnetic testing

Autor:	Zachary N. Wing, John W. Halloran, Sindhura Gangireddy
Rok vydání:	2013
Předmět:	Zirconium diboride Electromagnetic testing Materials science Metallurgy Activation energy engineering.material Ultra-high-temperature ceramics Stress (mechanics) chemistry.chemical_compound chemistry Flexural strength Creep Materials Chemistry Ceramics and Composites Silicon carbide engineering
Zdroj:	Journal of the European Ceramic Society. 33:2901-2908
ISSN:	0955-2219
DOI:	10.1016/j.jeurceramsoc.2013.05.031
Popis:	Flexural creep of ZrB 2 –30 vol% SiC ultra high temperature ceramic composite was studied at 1700–2200 °C and 20–50 MPa using the novel method of electromagnetic Lorentz force loading of electrically heated specimens. Experiments were conducted in air and in non-oxidizing atmospheres. The apparent activation energy for creep was 344 ± 35 kJ/mol for non-oxidizing conditions. The stress exponent was 1.4 ± 0.4. The creep rate was slightly higher in air due to a decrease in the size of the load bearing substrate because of oxidation. There was no evidence of electric field effects. Creep experiments could be performed up to 2200 °C very quickly, with experiments conducted in a few minutes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0e6735cddf3624622d4e081da4a1b48d https://doi.org/10.1016/j.jeurceramsoc.2013.05.031 Zobrazit plný text záznamu Full Text from ScienceDirect