Tvear -
Elsevier Sequoia S.A., Lausanne - Printed in the Netherlands
Systematic Abstracts of Current o. TRIBOLOGY JECTS
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RELATED
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Rheology. E. J. Villforth, J. W. Romberg and S. F. Chien, Lubrication (Texaco), 56 (2) (1970) 25-36: 7 figs., I table, IO refs. This article briefly indicates the very complex nature of rheological properties of materials. These properties can be dependent on shearing conditions and on time. Especially challenging is the understanding of the nature of the many and varied non-Newtonian fluids in the demanding environment of modern complex machines and numerous flow applications. Tribology and Electrochemistry. R. B. Waterhouse, Tribology, 3 (3) (1970) 158-162; I2 figs., I5 refs. The interaction between electrochemical and tribological processes when metals in contact with themselves or non-metals sliding in an aqueous environment is reviewed. The possibility of studying and controlling wear processes by well established electrochemical methods is discussed. The Swansea Tribology Centre. A. R. Lansdown, Ind. Lubrication, 22 (7) (1970) 169-175; 6 figs. The first article of a series describing the work and facilities of the Centres of Tribology. State of Documentation on the Fields of Wear, Friction and Lubrication. K. Kirschke, VDI-Z., r12 (22) (1970) 14g71499; I table, z refs. Since 1967, seven volumes of the documentation of wear, friction and lubrication have been prepared and issued by The Bundessanstalt fur Materialprufung (Federal Establishment for Testing Materials). This documentation which is to continue is a complete bibliography of all respective publications in the world arranged by subject. The Technology of Ceramic-fibre, Ceramicmatrix Composites. R. -4. J. Sambell, Composites, I (5) (1970) 276-285; g figs., 2 tables, 56 refs. Recent advances in ceramic-fibre technology, ceramic-forming processes and ceramic-composite fabrication are reviewed. Some of the techniques developed in the Harwell Ceramics Centre are referred to and suggestions made for possible composite fabrication routes.
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Literature Polyimide Resins for Carbon-fibre Composites. L. N. Phillips and K. F. Rogers, Composites, I (5) (1970) 286-289; 3 figs., 5 tables, 6 refs. A current state of the art review of polyimide resins for carbon-fibre composites. They possess good strength at high temperatures, have high resistance to oxidative degradation and are good electrical insulators over a wide range of temperature from below zero to 400°C. PVC-coated Steel Sheet. R. Jay, Composites, I (5) (1970) zgo--295; 11 figs. Techniques for fabricated PVC sheet are described. Jointing techniques and current apphcations are discussed. Their abrasion, corrosion and lubricant-environment resistance are considered. Fibres of High Thermal Stability. J. Aveston, Composites, I (5) (1970) zg6-zgg; 5 figs., I table, 2 refs. A review of alternatives to glass fibres for improving the stiffness-to-weight ratio of resinand aluminium-based composites. Properties are tabulated, uses and future developments are discussed.
I. DEFORMATION, TURE (No abstracts.)
FLOW
2. SURFACE PROPERTIES, AND FRICTION
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ADHESION
2.1. Surface properties (No abstracts.) 2.2. ildhesion and friction Effect of Oxide Film on the Friction of 52100 Steel in Vacuum R. Takagi, ASLE Trans. 13 (2) (1970) 87-98; IO figs., 2 tables, IO refs. A study of the anomalous behaviour of the coefficient of friction in reciprocated sliding of gzroo steel in ultra high vacuum. The shape of the friction plot is ascribed to a build-up and rupture of the oxide film that forms on the surface in atmosphere and is affected by applied load, surface finish and the pressure levelof theenvironment. Above acritical pressure level the drop was not experienced and it was found that higher friction does not always Wear, ‘7 (1971) 219-227