Effects of Technological Parameters on Properties of Ni Film Prepared by Supercritical Carbon Dioxide Emulsion

2012 ◽  
Vol 476-478 ◽  
pp. 493-497
Author(s):  
Wei Ning Lei ◽  
Wei Qiao Liu ◽  
Bo Jiang ◽  
Mi Qian ◽  
Cong Shun Tang
Keyword(s):  
Carbon Dioxide ◽  
Grain Size ◽  
Supercritical Carbon Dioxide ◽  
Conventional Method ◽  
Nickel Film ◽  
Hydrogen Solubility ◽  
Technological Parameters ◽  
Watts Bath ◽  
Experimental Pressure ◽  
Supercritical Carbon

The effect of supercritical carbon dioxide emulsion (Sc-CO2-E) on the smooth and microhardness of nickel film electroplated using Watts bath was studied in this paper. Morphology of nickel film electroplated with Sc-CO2-E was found much uniform. Microhardness of nickel film electroplated with Sc-CO2-E was higher than that of nickel film electroplated through conventional method. A increasing of microhardness was found for nickel film electroplated through Sc-CO2-E when increasing experimental pressure from 12 to 18 MPa, and the smooth of nickel film be promoted. This was because of higher hydrogen solubility and higher mobility in Sc-CO2-E. Grain size of nickel film electroplated with Sc-CO2-E was found to be refinement.

Bright nickel film deposited by supercritical carbon dioxide emulsion using additive-free Watts bath

2010 ◽  
Vol 55 (22) ◽  
pp. 6469-6475 ◽  
Author(s):  
Tso-Fu Mark Chang ◽  
Masato Sone ◽  
Akinobu Shibata ◽  
Chiemi Ishiyama ◽  
Yakichi Higo
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Nickel Film ◽  
Watts Bath ◽  
Supercritical Carbon

Micro-Compression Test of Nanocrystalline Nickel Deposited by Supercritical Carbon Dioxide Emulsion

2013 ◽  
Vol 284-287 ◽  
pp. 163-167 ◽  
Author(s):  
Takashi Nagoshi ◽  
Tso Fu Mark Chang ◽  
Tatsuo Sato ◽  
Masato Sone
Keyword(s):  
Carbon Dioxide ◽  
Grain Size ◽  
Supercritical Carbon Dioxide ◽  
Grain Boundary ◽  
Compression Test ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Nickel Film ◽  
Nanocrystalline Nickel ◽  
Supercritical Carbon

This paper reports experimental results of compression test on non-tapered rectangular shaped micro-pillar fabricated by focused ion beam techniques. The pillar is composed of electrodeposited nickel in additive-free Watts bath emulsified with supercritical carbon dioxide. We found that the electroplated film does not contain any defects or pores and has grain size of 8 nm. Maximum compression flow stress exceeds 3.5 GPa without any failure up to 9 % of permanent strain. This is 10 times higher than the strength of the single crystal nickel counterparts fabricated using the same focused ion beam techniques loaded along . This is because of the enhanced mechanical properties by grain boundary strengthening in nanocrystalline nickel and defect-free nickel film. Carbon impurity observed in the nickel film fabricated by electroplating with supercritical carbon dioxide emulsion enhances cohesion of the grain boundary and inhibits grain boundary sliding, which is the predominant deformation mechanisms in this grain size regime.

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