Abstract
Al–W alloy films with various W contents up to ~ 12 at.% were prepared by electrodeposition using 1-ethyl-3-methylimidazolium chloride (EMIC)–AlCl3 ionic liquids with different concentrations of W precursor, W6Cl12. The hardness (H) and Young's modulus (E) of the films were examined by nano-indentation. The films were composed of a single-phase fcc Al super-saturated solid solution, an amorphous phase, or both, depending on the W content and the deposition conditions. The H value increased with increasing W content up to 9.8 at.% and then decreased slightly with further increases in the W content up to 12.4 at.%. A similar trend was observed in the E value with increasing W content, but the decrease in E value at 12.4 at.% W was more significant than that in H value. The changes in the H and E values are discussed from the viewpoints of the grain size and the constituent phases. The 9.8–12.4 at.% W films, which had relatively high H values and H/E ratios, are expected to have a higher resistance to mechanical damage than Al films.
Original language | English |
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Pages (from-to) | 346-351 |
Number of pages | 6 |
Journal | Surface and Coatings Technology |
Volume | 325 |
DOIs | |
Publication status | Published - 2017 Sep 25 |
Externally published | Yes |
Keywords
- Aluminum
- Amorphous alloy
- Electroplating
- Ionic liquid
- Nano-indentation
- Tungsten
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry