PROPERTIES OF COMPOSITE COATINGS TRANSFORMED FROM NICKEL ELECTRODEPOSITS CONTAINING SILICON PARTICLES

1 KONIECZNY Marek
Co-authors:
1 CIEŚLIK Michał
Institution:
1 Kielce University of Technology, Faculty of Mechatronics and Mechanical Engineering, Kielce, Poland, EU, mkon@interia.pl
Conference:
26th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 24th - 26th 2017
Proceedings:
Proceedings 26th International Conference on Metallurgy and Materials
Pages:
1303-1308
ISBN:
978-80-87294-79-6
ISSN:
2694-9296
Published:
9th January 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
63 views / 19 downloads
Abstract

Composite (Ni) + Ni3Si coatings on C45 steel-substrate could be easily developed via three-step technology: electrodeposition of nickel interlayer, sediment co-deposition of Ni+Si and subsequent vacuum annealing at 980 C for 5 h. The results of hardness measurements showed that as-plated Ni+Si coating was 1.7 times harder than the electrodeposited Ni coating, but the hardest was (Ni) + Ni3Si coating (820 HV) due to the presence of the super hard Ni3Si phase. At 1000 C, (Ni) + Ni3Si coatings followed parabolic oxidation kinetic. During oxidation a thin continuous SiO2 layer formed below a layer of NiSiO3. After 100 h at 1000 C a mass gain for (Ni) + Ni3Si coating was about 6 times lesser than for nickel coating. The wear mass loss of the (Ni) + Ni3Si coatings was approximately 2.5 times smaller than for as-plated Ni and Ni+Si coatings. The oxidised for 50 h (Ni) + Ni3Si coatings containing hard and wear-resistant SiO2 particles also showed smaller wear mass loss than Ni and Ni + Si coatings.

Keywords: Nickel, silicon, composite coating, oxidation behavior, wear resistance

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