Some features of the formation of A1N during the reduction-nitriding of ultrafinely divided alumina

Autor:	I. I. Timofeeva, D. S. Yakovleva, T. S. Bartnitskaya, N. P. Tel'nikova, T. Ya. Kosolapova, G. S. Oleinik
Rok vydání:	1984
Předmět:	Materials science Metallurgy Metals and Alloys chemistry.chemical_element Nitride Atmospheric temperature range Condensed Matter Physics chemistry Mechanics of Materials Aluminium Metallic materials Materials Chemistry Ceramics and Composites Crystallite Nitriding Solid solution
Zdroj:	Soviet Powder Metallurgy and Metal Ceramics. 23:829-832
ISSN:	0038-5735
Popis:	A study was made of the process of carbothermic reduction-nitriding of ultrafinely divided alumina in the temperature range 1200–1450‡C. It was established that the carbothermic reduction-nitriding of ultrafinely divided alumina is accompanied by the formation of intermediate oxycarbide and oxynitride phases. This is a result of the alumina reduction process having a stepwise character and of the formation of solid solutions in the AI-O-N system. It is shown that the resultant aluminum nitride is in the form of polycrystalline particles. The sizes of the particles and of the grains in them are 1–3 and 0.01–0.2 Μm, respectively. With rise in nitriding temperature, the particles decrease and the grains increase in size.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a7dee1ce33c314edb2ccf685e6e2a17 https://doi.org/10.1007/bf00792179 Zobrazit plný text záznamu