Search for dissertations about: "Staffan Jacobson"
Showing result 6 - 10 of 26 swedish dissertations containing the words Staffan Jacobson.
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6. On the Nature of Cemented Carbide Wear in Rock Drilling
Abstract : WC/Co cemented carbide is a composite material for highly demanding wear applications. The unique combination of hardness (from the WC-phase) and toughness (from the binder Co) gives a material especially suitable for rock drilling. READ MORE
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7. Protective Tribofilms on Combustion Engine Valves
Abstract : Inside the complex machinery of modern heavy-duty engines, the sealing surfaces of the valve and valve seat insert have to endure. Right next to the combustion, temperatures are high and high pressure deforms the components, causing a small relative motion in the interface. READ MORE
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8. Combustion Valve Wear : A Tribological Study of Combustion Valve Sealing Interfaces
Abstract : The exhaust valve system of combustion engines experiences a very complex contact situation of frequent impact involving micro sliding, high and varying temperatures, complex exhaust gas chemistry and possible particulates, etc. In addition, the tribological situation in the exhaust valve system is expected to become even worse due to strict future emission regulations, which will require enhanced combustion and cleaner fuels. READ MORE
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9. Tribology of Metal-Graphite Composites : A Study of Sliding Electrical Contact Surfaces
Abstract : An environmentally sustainable production of electrical power is important for preserving the earth’s natural resources. In order to utilize this power as efficiently as possible, it is of great importance to minimize the losses, for example in sliding electrical contacts. READ MORE
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10. Triboactive Component Coatings : Tribological Testing and Microanalysis of Low-Friction Tribofilms
Abstract : Coatings are often used on critical components in machines and engines to reduce wear and to provide low friction in order to reduce energy losses and the environmental impact.A triboactive coating not only provides this desired performance, it also actively maintains the low friction by a structural or chemical change in a very thin top layer of these already micrometer thin coatings. READ MORE