Effect of heat treatments on the mechanical and tribological properties of electrodeposited Fe–W/Al2O3 composites
Journal article, 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

Author

Antonio Mulone

Chalmers, Industrial and Materials Science, Materials and manufacture

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)

Catalan Institution for Research and Advanced Studies

Uta Klement

Chalmers, Industrial and Materials Science, Materials and manufacture

Wear

0043-1648 (ISSN)

Vol. 448-449 203232

Subject Categories

Tribology

Manufacturing, Surface and Joining Technology

Composite Science and Engineering

DOI

10.1016/j.wear.2020.203232

More information

Latest update

2/17/2020