Preparation of Aluminum Coatings Containing Homogenous Nanocrystalline Microstructures Using the Cold Spray Process

Autor:	Luke N. Brewer, Aaron Christopher. Hall, Timothy John Roemer
Rok vydání:	2008
Předmět:	Materials science Metallurgy Gas dynamic cold spray chemistry.chemical_element Condensed Matter Physics Microstructure Nanocrystalline material Surfaces Coatings and Films chemistry Nanocrystal Transmission electron microscopy Aluminium Materials Chemistry Inert gas Ball mill
Zdroj:	Journal of Thermal Spray Technology. 17:352-359
ISSN:	1544-1016 1059-9630
Popis:	Nanostructured materials are of widespread interest because of the unique properties they offer. Well-proven techniques, such as ball milling, exist for preparing powders with nanocrystalline microstructures. Nevertheless, consolidation of nanocrystalline powders is challenging and presents an obstacle to the use of nanocrystalline metals. This work demonstrates that nanocrystalline aluminum powders can be consolidated using the cold spray process. Furthermore, transmission electron microscopy (TEM) analysis of the nanocrystalline cold spray coatings reveals that the cold spray process can cause significant grain refinement. Inert gas atomized 6061 and 5083 aluminum powders were ball milled in liquid nitrogen resulting in micron-sized powder containing 250-400 nm grains. Cold spray coatings prepared using these feed stock materials exhibited homogenous microstructures with grain sizes of 30-50 nm. TEM images of the as-received powders, ball-milled powders, and cold spray coatings are shown.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::21ac8e7f5a3c3ff1aea7c4a1cc5be5bc https://doi.org/10.1007/s11666-008-9180-6 Zobrazit plný text záznamu Plný text ve formátu PDF