| Title |
Improvement in the wear resistance under dry friction of electrodeposited Fe-W coatings through heat treatments / |
| Authors |
Mulone, Antonio ; Nicolenco, Aliona ; Imaz, Naroa ; Martinez-Nogues, Vanesa ; Tintaru, Natalia ; Cesiulis, Henrikas ; Klement, Uta |
| DOI |
10.3390/coatings9020066 |
| Full Text |
|
| Is Part of |
Coatings.. Basel : MDPI. 2019, vol. 9, iss. 2, art. no. 66, p. [1-13].. ISSN 2079-6412 |
| Keywords [eng] |
electrodeposition ; iron-tungsten alloys ; wear resistance ; heat treatment |
| Abstract [eng] |
The influence of the microstructural transformations upon heat treatments on the wear resistance of Fe-W coatings is studied. The coatings are electrodeposited from a glycolate-citrate plating bath with 24 at.% of W, and the wear resistance is investigated under dry friction conditions using ball-on-disc sliding tests. The samples were annealed in Ar atmosphere at different temperatures up to 800 °C. The microstructural transformations were studied by means of X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Electron Backscattered Diffraction (EBSD) technique. Except for the coating annealed at 800 °C, all the tested coatings suffered severe tribo-oxidation which resulted in the formation of deep cracks, i.e., ~15 μm in depth, within the wear track. The precipitation of the secondary phases, i.e., Fe2W and FeWO4, on the surface of the sample annealed at 800 °C increased the resistance to tribo-oxidation leading to wear tracks with an average depth of ~3 μm. Hence, the Fe-W coating annealed at 800 °C was characterized with a higher wear resistance resulting in a wear rate comparable to electrodeposited hard chromium coatings, i.e., 3 and 4 × 10−6 mm3/N m, respectively. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2019 |
| CC license |
|
