Influence of bath additives on the thermal stability of the nanostructure and hardness of Ni films processed by electrodeposition

Tamás Kolonits, Zsolt Czigány, L. Péter, I. Bakonyi, J. Gubicza

Research output: Contribution to journalArticle

Abstract

The effect of bath additives on the thermal stability of the microstructure and hardness of nanocrystalline Ni foils processed by electrodeposition was studied. Three samples with a thickness of 20 μm were prepared: one without any additive and two others with saccharin or trisodium citrate additives. Then, the specimens were heat-treated at different temperatures up to 1000 K. It was found that for the additive-free sample the recovery of the microstructure and the reduction of the hardness started only at temperatures higher than 500 K. At the same time, a decrease of the defect density and hardness was observed even at 400 K for the additive-containing films. This was explained by the higher defect density, which increased the thermodynamic driving force for recovery during annealing. At the highest applied temperature (1000 K), this larger thermodynamic driving force resulted in a recrystallization in the sulfur-containing sample, leading to a very low hardness of about 1000 MPa as compared to the additive-free sample (1300 MPa). On the other hand, the sample deposited with trisodium citrate additive showed a better thermal stability at 1000 K than the additive-free sample: the hardness remained as high as 2000 MPa even at 1000 K.

Original languageEnglish
Article number644
JournalCoatings
Volume9
Issue number10
DOIs
Publication statusPublished - Oct 1 2019

Fingerprint

Electrodeposition
electrodeposition
baths
Nanostructures
Thermodynamic stability
thermal stability
hardness
Hardness
Defect density
citrates
Thermodynamics
recovery
Recovery
Saccharin
Microstructure
thermodynamics
microstructure
Sulfur
defects
Temperature

Keywords

  • Annealing
  • Electrodeposition
  • Hardness
  • Microstructure
  • Nickel film

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Influence of bath additives on the thermal stability of the nanostructure and hardness of Ni films processed by electrodeposition. / Kolonits, Tamás; Czigány, Zsolt; Péter, L.; Bakonyi, I.; Gubicza, J.

In: Coatings, Vol. 9, No. 10, 644, 01.10.2019.

Research output: Contribution to journalArticle

@article{c4a4e30144e84d4eab903cbc48291ec5,
title = "Influence of bath additives on the thermal stability of the nanostructure and hardness of Ni films processed by electrodeposition",
abstract = "The effect of bath additives on the thermal stability of the microstructure and hardness of nanocrystalline Ni foils processed by electrodeposition was studied. Three samples with a thickness of 20 μm were prepared: one without any additive and two others with saccharin or trisodium citrate additives. Then, the specimens were heat-treated at different temperatures up to 1000 K. It was found that for the additive-free sample the recovery of the microstructure and the reduction of the hardness started only at temperatures higher than 500 K. At the same time, a decrease of the defect density and hardness was observed even at 400 K for the additive-containing films. This was explained by the higher defect density, which increased the thermodynamic driving force for recovery during annealing. At the highest applied temperature (1000 K), this larger thermodynamic driving force resulted in a recrystallization in the sulfur-containing sample, leading to a very low hardness of about 1000 MPa as compared to the additive-free sample (1300 MPa). On the other hand, the sample deposited with trisodium citrate additive showed a better thermal stability at 1000 K than the additive-free sample: the hardness remained as high as 2000 MPa even at 1000 K.",
keywords = "Annealing, Electrodeposition, Hardness, Microstructure, Nickel film",
author = "Tam{\'a}s Kolonits and Zsolt Czig{\'a}ny and L. P{\'e}ter and I. Bakonyi and J. Gubicza",
year = "2019",
month = "10",
day = "1",
doi = "10.3390/coatings9100644",
language = "English",
volume = "9",
journal = "Coatings",
issn = "2079-6412",
publisher = "MDPI AG",
number = "10",

}

TY - JOUR

T1 - Influence of bath additives on the thermal stability of the nanostructure and hardness of Ni films processed by electrodeposition

AU - Kolonits, Tamás

AU - Czigány, Zsolt

AU - Péter, L.

AU - Bakonyi, I.

AU - Gubicza, J.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - The effect of bath additives on the thermal stability of the microstructure and hardness of nanocrystalline Ni foils processed by electrodeposition was studied. Three samples with a thickness of 20 μm were prepared: one without any additive and two others with saccharin or trisodium citrate additives. Then, the specimens were heat-treated at different temperatures up to 1000 K. It was found that for the additive-free sample the recovery of the microstructure and the reduction of the hardness started only at temperatures higher than 500 K. At the same time, a decrease of the defect density and hardness was observed even at 400 K for the additive-containing films. This was explained by the higher defect density, which increased the thermodynamic driving force for recovery during annealing. At the highest applied temperature (1000 K), this larger thermodynamic driving force resulted in a recrystallization in the sulfur-containing sample, leading to a very low hardness of about 1000 MPa as compared to the additive-free sample (1300 MPa). On the other hand, the sample deposited with trisodium citrate additive showed a better thermal stability at 1000 K than the additive-free sample: the hardness remained as high as 2000 MPa even at 1000 K.

AB - The effect of bath additives on the thermal stability of the microstructure and hardness of nanocrystalline Ni foils processed by electrodeposition was studied. Three samples with a thickness of 20 μm were prepared: one without any additive and two others with saccharin or trisodium citrate additives. Then, the specimens were heat-treated at different temperatures up to 1000 K. It was found that for the additive-free sample the recovery of the microstructure and the reduction of the hardness started only at temperatures higher than 500 K. At the same time, a decrease of the defect density and hardness was observed even at 400 K for the additive-containing films. This was explained by the higher defect density, which increased the thermodynamic driving force for recovery during annealing. At the highest applied temperature (1000 K), this larger thermodynamic driving force resulted in a recrystallization in the sulfur-containing sample, leading to a very low hardness of about 1000 MPa as compared to the additive-free sample (1300 MPa). On the other hand, the sample deposited with trisodium citrate additive showed a better thermal stability at 1000 K than the additive-free sample: the hardness remained as high as 2000 MPa even at 1000 K.

KW - Annealing

KW - Electrodeposition

KW - Hardness

KW - Microstructure

KW - Nickel film

UR - http://www.scopus.com/inward/record.url?scp=85073053609&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85073053609&partnerID=8YFLogxK

U2 - 10.3390/coatings9100644

DO - 10.3390/coatings9100644

M3 - Article

AN - SCOPUS:85073053609

VL - 9

JO - Coatings

JF - Coatings

SN - 2079-6412

IS - 10

M1 - 644

ER -