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Effect of Graded Bias Voltage on the Microstructure of arc-PVD CrN Films and its Response in Electrochemical & Mechanical Behavior

M.L. Cedeño-Ventéa, D.G. Espinosa-Arbeláeza

2009escrnpvdcoatingsmicrostructurecorrosion

Abstract

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The effect of graded or constant bias voltages (-40 V, -80 V and -40/60/80 V) on size grain and surface defects of arc PVD deposited CrN films was investigated. Corrosion resistance evaluated using electrochemical impedance spectroscopy (EIS) and potentiodynamic curves (Tafel) and the mechanical behavior evaluated by means of instrumented nanoindentation and scratch testing was correlated with the microstructural changes. It was found that the bias voltage variation affects corrosion behavior due to the presence of defects (i.e. open voids, droplets) which also affects the failure mechanisms and increasing spallation. High bias voltage (-80 V) increases nano-hardness and the elastic modulus due to the dense microstructure of the CrN coating.

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Cite This Work

@article{fd88ad71-b153-4cb2-a1b0-722a1619f219,
  title={Effect of Graded Bias Voltage on the Microstructure of arc-PVD CrN Films and its Response in Electrochemical & Mechanical Behavior},
  author={M.L. Cedeño-Ventéa and D.G. Espinosa-Arbeláeza},
  year={2009},
  language={es}
}
TY  - JOUR
TI  - Effect of Graded Bias Voltage on the Microstructure of arc-PVD CrN Films and its Response in Electrochemical & Mechanical Behavior
AU  - M.L. Cedeño-Ventéa
AU  - D.G. Espinosa-Arbeláeza
PY  - 2009
LA  - es
ER  -

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