Effect of pressure on the electrodeposition of nanocrystalline Ni-C in supercritical CO2 fluid

Sung Ting Chung, Wen-Ta Tsai

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Electrodeposition of Ni in a Watt's bath at different applied pressure, and in the presence of CO2 fluid was investigated. The reduction of carbon and its alloying into the Ni deposit was focused. The current efficiency of electrodeposition and the carbon content in the Ni deposit were found to vary with the applied pressure. The crystal structure of the resulting Ni-C film was characterized by performing X-ray diffraction. The composition of the deposit was analyzed using X-ray photoelectron spectroscopy. Transmission electron microscopy was employed for microstructure analysis. The results showed that nanocrystalline Ni-C deposit could be obtained. The grain size of the Ni-C film varied from 14 to 43 nm, depending on the deposition pressure and carbon content. A significant increase in microhardness from 450 to 720 Hv could be obtained for the Ni film electrodeposited from a bath of 15 MPa supercritical CO2 fluid. In 1 M HCl solution, a higher open circuit potential and a lower anodic current density were found when the carbon content in the Ni deposit was increased.

Original languageEnglish
Pages (from-to)7236-7239
Number of pages4
JournalThin Solid Films
Volume518
Issue number24
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

Supercritical fluids
supercritical fluids
Electrodeposition
electrodeposition
Deposits
deposits
Carbon
carbon
baths
Alloying
Microhardness
microhardness
alloying
x rays
Current density
X ray photoelectron spectroscopy
Crystal structure
grain size
photoelectron spectroscopy
current density

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Chung, Sung Ting ; Tsai, Wen-Ta. / Effect of pressure on the electrodeposition of nanocrystalline Ni-C in supercritical CO2 fluid. In: Thin Solid Films. 2010 ; Vol. 518, No. 24. pp. 7236-7239.
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Effect of pressure on the electrodeposition of nanocrystalline Ni-C in supercritical CO2 fluid. / Chung, Sung Ting; Tsai, Wen-Ta.

In: Thin Solid Films, Vol. 518, No. 24, 01.10.2010, p. 7236-7239.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Chung, Sung Ting

AU - Tsai, Wen-Ta

PY - 2010/10/1

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AB - Electrodeposition of Ni in a Watt's bath at different applied pressure, and in the presence of CO2 fluid was investigated. The reduction of carbon and its alloying into the Ni deposit was focused. The current efficiency of electrodeposition and the carbon content in the Ni deposit were found to vary with the applied pressure. The crystal structure of the resulting Ni-C film was characterized by performing X-ray diffraction. The composition of the deposit was analyzed using X-ray photoelectron spectroscopy. Transmission electron microscopy was employed for microstructure analysis. The results showed that nanocrystalline Ni-C deposit could be obtained. The grain size of the Ni-C film varied from 14 to 43 nm, depending on the deposition pressure and carbon content. A significant increase in microhardness from 450 to 720 Hv could be obtained for the Ni film electrodeposited from a bath of 15 MPa supercritical CO2 fluid. In 1 M HCl solution, a higher open circuit potential and a lower anodic current density were found when the carbon content in the Ni deposit was increased.

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