Improvement in the Wear Resistance under Dry Friction of Electrodeposited Fe-W Coatings through Heat Treatments
Artikel i vetenskaplig tidskrift, 2019

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.% ofW, 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 800C. 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 800C, 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 800C 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 mm^3/N m, respectively.

heat treatment

iron-tungsten alloys

electrodeposition

wear resistance

Författare

Antonio Mulone

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Aliona Nicolenco

Vilniaus universitetas

Naroa Imaz

CIDETEC

Vanesa Martinez-Nogues

CIDETEC

Natalia Tsyntsaru

Vilniaus universitetas

Henrikas Cesiulis

Vilniaus universitetas

Uta Klement

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Coatings

2079-6412 (ISSN)

2 66-

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

Europeiska kommissionen (Horisont 2020), 2015-01-01 -- 2018-12-31.

Drivkrafter

Hållbar utveckling

Ämneskategorier

Tribologi

Metallurgi och metalliska material

Korrosionsteknik

Styrkeområden

Materialvetenskap

DOI

10.3390/coatings9020066

Mer information

Senast uppdaterat

2019-04-02