Nanocrystalline Electrodeposited Fe-W/Al2O3 Composites: Effect of Alumina Sub-microparticles on the Mechanical, Tribological, and Corrosion Properties
Artikel i vetenskaplig tidskrift, 2019

In this study, nanocrystalline Fe-Walloy and Fe-W/Al2O3 composite coatings with various contents of sub-microsized alumina particles have been obtained by electrodeposition from an environmentally friendly Fe(III)-based electrolyte with the aim to produce a novel corrosion and wear resistant material. The increase in volume fraction of Al2O3 in deposits from 2 to 12% leads to the grain refinement effect, so that the structure of the coatings change from nanocrystalline to amorphous-like with grain sizes below 20 nm. Nevertheless, the addition of particles to the Fe-W matrix does not prevent the development of a columnar structure revealed for all the types of studied coatings. The observed reduction in both hardness and elastic modulus of the Fe-W/Al2O3 composites is attributed to the apparent grain size refinement/amorphization and the nanoporosity surrounding the embedded Al2O3 particles. In the presence of 12 vol% of Al2O3 in deposits, the wear rate decreases by a factor of 10 as compared to Fe- W alloy tested under dry friction conditions due to the lowering of tribo-oxidation. The addition of alumina particles slightly increases the corrosion resistance of the coatings; however, the corrosion in neutral chloride solution occurs through the preferential dissolution of Fe from the matrix. The obtained results provide a possibility to integrate the nanocrystalline Fe-W/Al2O3 composite coatings into various systems working under dry friction conditions, for example, in high-temperature vacuum systems.

columnar growth

iron alloys

alumina

wear resistance

composite coatings

Författare

Aliona Nicolenco

Vilniaus universitetas

Antonio Mulone

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Naroa Imaz

CIDETEC

Natalia Tsyntsaru

Vilniaus universitetas

Jordi Sort

Universitat Autonoma de Barcelona (UAB)

Eva Pellicer

Universitat Autonoma de Barcelona (UAB)

Uta Klement

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Henrikas Cesiulis

Vilniaus universitetas

Eva Garcia-Lecina

CIDETEC

Frontiers in Chemistry

2296-2646 (ISSN)

Vol. 7 241-

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.

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Metallurgi och metalliska material

Kompositmaterial och -teknik

Styrkeområden

Materialvetenskap

DOI

10.3389/fchem.2019.00241

Mer information

Senast uppdaterat

2019-06-26