Effect of H3PO3 concentration on the electrodeposition of nanocrystalline Ni-P deposited in an emulsified supercritical CO2 bath

Sung Ting Chung, Yan Chi Chuang, Shih Yi Chiu, Wen-Ta Tsai

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The electrodeposition of Ni-P alloy in an emulsified supercritical carbon dioxide (sc-CO2) bath was investigated to explore the effect of H3PO3 concentration (ranging from 0 to 1.6 M) on the material characteristics of the deposits. The experimental results showed that the P content in the deposit increased with increasing H3PO 3 concentration in the emulsified sc-CO2 bath, while the weight gain of the Ni-P film decreased. At the same concentration of H 3PO3, the significant decreases in weight gain and P content of the Ni-P films deposited in the emulsified sc-CO2 bath were found, as compared with that plated in the conventional aqueous electrolyte at ambient pressure. X-ray photoelectron analyses revealed that the carbon-containing Ni-P deposit could be obtained in the bath with the presence of sc-CO2 fluid. Transmission electron microscopy was employed for microstructure analysis. The average grain size of the Ni-P films deposited in the conventional aqueous electrolyte at ambient pressure or in the emulsified sc-CO2 bath varied, depending on the H3PO3 concentration and P content. The Ni-P films deposited from the emulsified sc-CO2 bath had a higher hardness as compared with that formed in conventional electrolyte. The hardness of Ni-P alloy deposited in the emulsified sc-CO2 bath was enhanced by the additional solid solution strengthening mechanism.

Original languageEnglish
Pages (from-to)571-577
Number of pages7
JournalElectrochimica Acta
Volume58
Issue number1
DOIs
Publication statusPublished - 2011 Dec 30

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Fingerprint Dive into the research topics of 'Effect of H<sub>3</sub>PO<sub>3</sub> concentration on the electrodeposition of nanocrystalline Ni-P deposited in an emulsified supercritical CO<sub>2</sub> bath'. Together they form a unique fingerprint.

  • Cite this