Electroless Ni-B deposition from an emulsified supercritical carbon dioxide bath

Hung Yu Wang, Sung Ting Chung, Yan Chi Chuang, Wen Ta Tsai

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9 Citations (Scopus)

Abstract

The electroless deposition of boron-containing Ni (EN-B) film from a supercritical carbon dioxide (sc-CO2) bath was introduced. The deposition rate in sc-CO2 bath was one order of magnitude lower than that at ambient pressure without the presence of sc-CO2. A more uniform chemical composition of the EN-B film could be obtained if it was deposited in the sc-CO2 bath. X-ray diffraction analyses revealed that the as-deposited film was amorphous in nature, despite of the deposition condition. Deposition defects such as cracks and voids could be avoided if the deposition was conducted in the sc-CO2 bath. Crystallization and boride precipitation were found after heat treatment at 400 °C for 1 h. The EN-B film deposited from the sc-CO2 bath had a higher hardness as compared with that of the normal EN-B coating. A substantial increase in hardness was obtained due to boride precipitation.

Original languageEnglish
Pages (from-to)7505-7508
Number of pages4
JournalThin Solid Films
Volume518
Issue number24
DOIs
Publication statusPublished - 2010 Oct 1

All Science Journal Classification (ASJC) codes

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

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