Double-Shelled L12 Nano-structures in Quaternary Al–Er–Sc–Zr Alloys: Origin and Critical Significance

Autor:	Jianghua Chen, Zhang Chaomin, Yong Jiang, Kexing Song, Sheng Zhan, Pan Xie, Wen-Quan Ming, Hao Zhang
Rok vydání:	2021
Předmět:	Materials science Energetics Metals and Alloys Shell (structure) Nucleation Kinetic energy Industrial and Manufacturing Engineering Characterization (materials science) chemistry.chemical_compound chemistry Transmission electron microscopy Chemical physics Nano Organometallic chemistry
Zdroj:	Acta Metallurgica Sinica (English Letters). 34:1277-1284
ISSN:	2194-1289 1006-7191
DOI:	10.1007/s40195-021-01270-w
Popis:	The formation of highly coherent double-shelled L12 nano-precipitates in dilute Al–Er–Sc–Zr alloys was investigated with the combined use of Cs-corrected transmission electron microscopy characterization and first-principles energetics calculations. The double-shelled nano-precipitates are primarily featured with an Er-rich core surrounded by a Sc-rich inner shell and a Zr-rich outer shell. First-principles energetics analyses based on the classic homogenous nucleation theory suggested that once forms, this double-shell structure can be thermally stable. The predominant formation of this double-shell structure has thus both profound kinetic and thermodynamic origins. Its formation and stability preference to all other possible L12 nano-structures would become more pronounced as its size increases, no matter what the solute ratio and aging temperature of interest.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ce88cab2f55220fa0b82f6128c1d607b https://doi.org/10.1007/s40195-021-01270-w Zobrazit plný text záznamu Full text from SpringerLink