Adhesion and Friction Properties of Fluorocarbon Polymer Thin Films Coated onto Metal Substrates

Satoru Iwamori

doi:10.4028/www.scientific.net/KEM.384.311

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Enhancing Corrosion Resistance of Stainless Steel 304 Using Laser Surface Treatment
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Investigation of Hastelloy C Laser Clad Melt Pool Size and its Effect on Clad Formation
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Surface Grain Size Effects on the Corrosion of Magnesium
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Surface Treatment of Magnesium Alloys by Electroless Ni –P Plating Technique with Emphasis on Zinc Pre-Treatment: A Review
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Anodizing – A Key for Surface Treatment of Aluminium
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Electroplated Nickel Composites with Micron- to Nano-Sized Particles
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Adhesion and Friction Properties of Fluorocarbon Polymer Thin Films Coated onto Metal Substrates
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Tribological Behaviors of Nanostructured Surface Layer Processed by Means of Surface Mechanical Attrition Treatment
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 384Adhesion and Friction Properties of Fluorocarbon...

Adhesion and Friction Properties of Fluorocarbon Polymer Thin Films Coated onto Metal Substrates

Abstract:

Poly(tetrafluoroethylene)(PTFE) thin films were coated onto metal substrates by a spin coat apparatus, vacuum evaporator and RF sputtering, and their adhesion and friction properties evaluated. PTFE thin film coated onto nickel-titanium (Ni-Ti) substrate by spin coating showed a low friction coefficient, however pull strength between the thin film and Ni-Ti substrate was low. In order to increase the pull strength, PTFE and poly(vinyl alcohol) (PVA) composite thin films were introduced between the PTFE thin film and Ni-Ti substrate by spin coating. PTFE thin film was also coated onto SUS302 substrate by a vacuum evaporator. This PTFE thin film showed poor adhesion to the SUS302 substrate. The adhesion was enhanced by heating of the substrate during the evaporation. In addition, a PTFE and ethylene vinyl alcohol (EVOH) composite thin film showed higher adhesion strength than that of the PTFE thin film. Poly(fluorocarbon) thin films were prepared by a conventional RF sputtering with PTFE target. These thin films showed a higher friction coefficient than that of the pristine PTFE. Molecular structures of the poly(fluorocarbon) thin films prepared by RF sputtering were different from the pristine PTFE. This difference may have influenced the friction coefficient. The pull strength of metal thin films such as gold, copper, nickel and aluminum deposited on the sputtered PTFE thin films by vacuum evaporation was measured. The nickel thin film adhered to the PTFE thin film most strongly of all the thin films.

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Periodical:

Key Engineering Materials (Volume 384)

Pages:

311-320

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.384.311

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Online since:

June 2008

Authors:

Satoru Iwamori

Keywords:

Friction, Poly(tetrafluoroethylene)(PTFE), Pull Strength, RF Sputtering, Spin Coat, Thin Film, Vacuum Evaporation

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