In-situ TEM annealing of amorphous Fe-24at.%W coatings and the effect of crystallization on hardness
Artikel i vetenskaplig tidskrift, 2020

This paper describes the crystallization which occurs upon annealing of an amorphous Fe-24at.%W coatings, electrodeposited from a glycolate-citrate plating bath. A combination of Differential Scanning Calorimetry and in-situ Transmission Electron Microscopy annealing is used to study the onset of crystallization of the amorphous coating. The in-situ TEM analyses reveal the formation of first crystallites after annealing at 400 °C for 30 min. Upon a temperature increase to 500–600 °C, the crystallites develop into Fe-rich nanocrystals with ~ 40 nm grain size. The nanocrystals are dispersed in the remaining amorphous Fe-W matrix, which results in the formation of a mixed nanocrystalline-amorphous structure. The observed crystallization can be held responsible for the increase in the hardness obtained upon annealing of Fe-24at.%W coatings. In fact, the hardness of the as-deposited material increases from 11 to 13 GPa after annealing at 400 °C, and it reaches the maximum value of 16.5 GPa after annealing at 600 °C.

Författare

Antonio Mulone

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Inga Ennen

Universität Bielefeld

Andreas Huetten

Universität Bielefeld

Uta Klement

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Journal of Materials Science

0022-2461 (ISSN) 1573-4803 (eISSN)

Vol. 56 5 4006-4012

Smart ELECTrodeposited Alloys for environmentally sustainable applications: from advanced protective coatings to micro/nano-robotic platforms (SELECTA)

Europeiska kommissionen (EU), 2015-01-01 -- 2018-12-31.

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Materialteknik

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Chalmers materialanalyslaboratorium

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Materialvetenskap

DOI

10.1007/s10853-020-05485-7

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Senast uppdaterat

2020-11-26