B6O: A Correlation Between Mechanical Properties and Microstructure Evolution upon Al2O3Addition During Hot Pressing

Autor:	Stefan Lauterbach, Thembinkosi Shabalala, Hans-Joachim Kleebe, Mathias Herrmann, Iakovos Sigalas
Rok vydání:	2008
Předmět:	Materials science Nanostructure Mineralogy Sintering Hot pressing Microstructure chemistry.chemical_compound Grain growth Fracture toughness chemistry Phase (matter) Materials Chemistry Ceramics and Composites Boron suboxide Composite material
Zdroj:	Journal of the American Ceramic Society. 91:569-575
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1551-2916.2007.02167.x
Popis:	B6O powders were hot pressed with and without Al2O3 as a sintering additive at temperatures up to 1900°C and a pressure of 50 MPa. The microstructure of a doped and undoped sample was studied by transmission electron microscopy techniques. This paper aims at studying the correlation between micro/nanostructure evolution and the resulting mechanical properties; i.e., hardness and fracture toughness. The addition of alumina yields the formation of a secondary aluminum borate phase in addition to promoting grain growth strongly. While the addition of Al2O3 slightly decreased the hardness of the B6O polycrystals, the corresponding fracture toughness was strongly improved, as compared with the undoped material.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::54f99a9583c7ed274a92220970934015 https://doi.org/10.1111/j.1551-2916.2007.02167.x Zobrazit plný text záznamu Plný text ve formátu PDF