Article (Scientific journals)
Selection of New Heat Treatment Conditions for Novel Electroless Nickel-Boron Deposits and Characterization of Heat-Treated Coatings
Vitry, Véronique; Mégret, Alexandre; Khalid, Hafiza Ayesha et al.
2022In Coatings, 13 (1), p. 1
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Keywords :
Materials Chemistry; Surfaces, Coatings and Films; Surfaces and Interfaces
Abstract :
[en] Electroless nickel-boron coatings were deposited from a novel deposition bath that was stabilizer-free. Those coatings were analyzed by DSC to determine the crystallization temperature of nickel-boride phases, and then the best heat treatment conditions for the new coatings were selected using the Knoop hardness test and XRD. The results of DSC analysis and XRD were coherent with the findings of previous studies, which shows that the new coating has a boron content lower than 4% wt. The maximum hardness was obtained after heat treatment at 300 °C for 4 h and reached 1196 ± 120 hk50, which is much higher than the as-deposited coating. The heat-treated coatings were then fully characterized using optical and scanning electron microscopy, as well tribological and corrosion tests. Various sliding tests (ball-on-disk and ball-on-flat configurations) were conducted to analyze the coefficient of friction (COF) and wear behavior of the coatings. The maximum von Mises stress was calculated, and values of 624 MPa and 728 MPa were obtained for the ball-on-disk and ball-on flat, respectively, at a depth close to 14 µm from the surface, confirming the suitability of the applied load. Abrasive, adhesive, and fatigue wear mechanisms were observed on the worn sample morphology using SEM. It has been determined that during the corrosion test the OCP and corrosion potential values for the heat-treated coating increase as compared with the as-deposited one, whereas its corrosion resistance decreases.
Research center :
CRIM - Ingénierie des matériaux
Disciplines :
Materials science & engineering
Author, co-author :
Vitry, Véronique   ;  Université de Mons - UMONS > Faculté Polytechnique > Service de Métallurgie
Mégret, Alexandre  ;  Université de Mons - UMONS > Faculté Polytechnique > Service de Métallurgie
Khalid, Hafiza Ayesha
Staia, Mariana Henriette
Montagne, Alex
Yunacti, Müslüm  ;  Université de Mons - UMONS > Faculté Polytechnique > Service de Métallurgie
 These authors have contributed equally to this work.
Language :
English
Title :
Selection of New Heat Treatment Conditions for Novel Electroless Nickel-Boron Deposits and Characterization of Heat-Treated Coatings
Publication date :
20 December 2022
Journal title :
Coatings
eISSN :
2079-6412
Publisher :
MDPI AG
Volume :
13
Issue :
1
Pages :
1
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
F601 - Métallurgie
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
Interreg and European Regional Development Fund
Available on ORBi UMONS :
since 22 December 2022

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