Improvement in the Wear Resistance under Dry Friction of Electrodeposited Fe-W Coatings through Heat Treatments
Journal article, 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.% 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.

electrodeposition

wear resistance

heat treatment

iron-tungsten alloys

Author

Antonio Mulone

Chalmers, Industrial and Materials Science, Materials and manufacture

Aliona Nicolenco

Vilnius University

Naroa Imaz

CIDETEC

Vanesa Martinez-Nogues

CIDETEC

Natalia Tsyntsaru

Vilnius University

Henrikas Cesiulis

Vilnius University

Uta Klement

Chalmers, Industrial and Materials Science, Materials and manufacture

Coatings

2079-6412 (ISSN)

2 66-

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

European Commission (Horizon 2020), 2015-01-01 -- 2018-12-31.

Driving Forces

Sustainable development

Subject Categories

Tribology

Metallurgy and Metallic Materials

Corrosion Engineering

Areas of Advance

Materials Science

DOI

10.3390/coatings9020066

More information

Latest update

11/7/2019