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Tribology of Interface Layers - Hooshang Heshmat

Tribology of Interface Layers

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To this point, the field of lubrication has been conceptualized using several noncontiguous modes of operationa "boundary, fluid-film, and dry and solid lubrication. Engineers and analysts have long had to deal with old evidence that many tribological devices, such as flat surface and centrally pivoted sliders, can act as viable bearingsa "contradicting basic hydrodynamic theory.

Tribology of Interface Layers introduces a new concept wherein disparate modes are shown to actually be particular phases of a tribological continuum spanning a wide array of material lubricants. The author details these phenomena and presents a novel definition of lubricants as intermediate layers.

Explores the phenomenon of continuum spectrum as applied to new powder lubrication technology

The book illustrates that, contrary to previous understanding, the various lubrication modesa "from dry to hydrodynamic to powder lubricationa "all overlap each other within a tribological spectral continuum. It also elucidates the fact that bearings, seals, dampers, and similar devices using submicron powder lubricants possess quasi-hydrodynamic characteristics akin to conventional fluid films. Similarly, powder films possess quasi-hydrodynamic features that enable them to act as conventional fluid film bearings. The field of tribology has traditionally been presented in terms of disparate regimes, but this method of classification lacked sufficient rigor. This volume explains that characterization and treatment of any one regime may require the simultaneous accounting of several different modalities that are present in a particular mode of operation. Based on experimental and theoretical work, this text shows how the interdependence of powder and hydrodynamic lubrication exemplifies that perpetuity in tribological processes.

Historical Perspective. The Rheology of Interface Lubricatoin. The Phenomenology of Lubrication. Direct Contact-Hydrodynamic Continuum. Hydrodynamic-Solid Films Continuum. Experimental Performance of Powder Layers. Powder Lubricated Tribo-Systems. Theory of Powder Lubrication. Granular Films. The Tribological Continuum.

ISBN: 9780824758325
ISBN-10: 0824758323
Audience: Professional
Format: PDF
Language: English
Published: 21st May 2010
Country of Publication: US
Edition Number: 1