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The Rheological Behavior of the Nano-Meter Film of Non-Functional PFPE on Hard Disk Surfaces during Spin-Off

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Abstract

Spin-off experiments were conducted at different temperatures for a nonfunctional PFPE Z25 film with an initial thickness of 2.4 nm, and comparison with the diffusion experiments was carried out. It is found that PFPE Z25 shows completely different rheological behaviors in spin-off and diffusion. Theoretical model based on the Fick law of diffusion was proposed, which is called the Layer Molecular Dynamic Diffusion (LMDD) model. The proposed model results in a much better agreement with the spin-off experimental results than the continuum theory being used at present. Contrary to the results in the diffusion experiment, the nanometer film of nonfunctional PFPE Z25 also shows a layered structure in the spin-off.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga-shi, Saga, 840-8502, Japan

    B. Zhang & A. Nakajima

  2. Fujitsu Laboratories Ltd, Atsugi, Japan

    H. Chiba

Authors
  1. B. Zhang
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  2. H. Chiba
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  3. A. Nakajima
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Correspondence to B. Zhang.

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Zhang, B., Chiba, H. & Nakajima, A. The Rheological Behavior of the Nano-Meter Film of Non-Functional PFPE on Hard Disk Surfaces during Spin-Off. Tribol Lett 35, 25–30 (2009). https://doi.org/10.1007/s11249-009-9428-4

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  • DOI: https://doi.org/10.1007/s11249-009-9428-4

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