Formation of intermetallic phases during mechanical alloying and annealing of Cr + 20 wt % al mixtures

Autor:	V. V. Usol’tsev, L. S. Davlitova, Vladislav A. Sadykov, S. F. Tikhov, Oleg I. Lomovsky, Dina V. Dudina, G. V. Golubkova, Jae Seong Kim, Young-Soon Kwon, V. V. Malakhov
Rok vydání:	2008
Předmět:	Materials science Annealing (metallurgy) General Chemical Engineering Metallurgy Metals and Alloys Intermetallic chemistry.chemical_element Amorphous solid Inorganic Chemistry chemistry Chemical engineering Aluminium Materials Chemistry Dissolution
Zdroj:	Inorganic Materials. 44:587-591
ISSN:	1608-3172 0020-1685
DOI:	10.1134/s0020168508060083
Popis:	We have studied phase-formation processes in mixtures of Cr and Al (20 wt %) powders in the course of mechanical alloying (MA) and the phase transformations of the samples during subsequent annealing at temperatures of up to 800°C. The resultant x-ray amorphous intermetallic phases were identified by a differential dissolution method, which allows one to follow the formation of x-ray amorphous and partially crystallized phases. During MA of Cr + Al mixtures, the first to form is x-ray amorphous Cr4Al, which then converts to partially crystallized Cr2Al through reaction with aluminum. The peritectoid decomposition of Cr4Al during heating of the MA samples is accompanied by heat release at 330–350°C. Heating to 420°C leads to the formation of Cr5Al8. At 800°C, Cr5Al8 reacts with Cr to form Cr2Al.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c5005ce7be9b9527356c76a0016dd5af https://doi.org/10.1134/s0020168508060083 Zobrazit plný text záznamu Plný text ve formátu PDF