Effect of heat treatments on the mechanical and tribological properties of electrodeposited Fe–W/Al2O3 composites
Artikel i vetenskaplig tidskrift, 2020

In this study, the influence of heat treatment on the mechanical and tribological properties of electrodeposited Fe–W/Al2O3 composite coatings is studied. The properties of the as-deposited and annealed composites are compared with those of electrodeposited hard chromium coatings. The amorphous structure of the Fe–W matrix transforms into a mixed amorphous-crystalline structure upon annealing at 600 °C for 1 h. The observed microstructural transformations result in a substantial increase of both the hardness and the reduced Young's modulus of the Fe–W/Al2O3 composite coatings, reaching values of 16.3 GPa and 191.7 GPa, respectively. The results on the wear resistance studied under dry friction using ball-on-disc sliding tests show that a low wear rate is obtained for both as-deposited and annealed composite coatings, i.e. ~1.5 × 10−6 mm3/Nm. In contrast, the heat treatments are detrimental for both the hardness and wear resistance of hard chromium coatings. As a consequence, the mechanical and wear properties of the electrodeposited Fe–W/Al2O3 composite coatings, especially after annealing, are superior to the properties of hard chromium coatings. Hence, Fe–W/Al2O3 composite coatings can be considered as a valid and sustainable alternative to hard chromium coatings, particularly in applications where these materials may be exposed to high temperatures.

Heat treatment

Electrodeposition

Composite coatings

Iron-tungsten alloys

Wear resistance

Författare

Antonio Mulone

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Aliona Nicolenco

Universitat Autonoma de Barcelona (UAB)

Institute of Physics

Naroa Imaz

Centro de Investigacion Tecnológica En Electroquimica

J. Fornell

Universitat Autonoma de Barcelona (UAB)

Jordi Sort

Universitat Autonoma de Barcelona (UAB)

Institucio Catalana de Recerca i Estudis Avancats

Uta Klement

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Wear

0043-1648 (ISSN)

Vol. 448-449 203232

Ämneskategorier

Tribologi

Bearbetnings-, yt- och fogningsteknik

Kompositmaterial och -teknik

DOI

10.1016/j.wear.2020.203232

Mer information

Senast uppdaterat

2020-02-17