Search for dissertations about: "improve hardness"
Showing result 1 - 5 of 58 swedish dissertations containing the words improve hardness.
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1. Synthesis and Characterization of Transition Metal Diborides
Abstract : This thesis is devoted towards physical vapor deposition (PVD) of thin films of transition-metal (TM) diborides, focused on the material system TiBx, Ti1-xAlxB2-y and CrBx. The metal diborides are a large family of compounds with both metallic and ceramic properties, due to its bonding nature being a mix of covalent and ionic bonds. READ MORE
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2. Synthesis, Characterization, and Evaluation of Ag-based Electrical Contact Materials
Abstract : Ag is a widely used electrical contact material due to its excellent electrical properties. The problems with Ag are that it is soft and has poor tribological properties (high friction and wear in Ag/Ag sliding contacts). READ MORE
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3. Label Cover Reductions for Unconditional Approximation Hardness of Constraint Satisfaction
Abstract : Problem solving is an integral aspect of modern society and includes such tasks as picking the fastest route to work, optimizing a production line, scheduling computer tasks, placing new bus stops, or picking a meal from available ingredients.We study the hardness of solving Constraint Satisfaction Problems (CSPs). READ MORE
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4. Impact of Ionizing Radiation on 4H-SiC Devices
Abstract : Electronic components, based on current semiconductor technologies and operating in radiation rich environments, suffer degradation of their performance as a result of radiation exposure. Silicon carbide (SiC) provides an alternate solution as a radiation hard material, because of its wide bandgap and higher atomic displacement energies, for devices intended for radiation environment applications. READ MORE
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5. Laser-arc treatment of aluminium alloys
Abstract : The increasing use of aluminium alloys in high demand applications has lead to the development of a number of surface treatment technologies designed to improve hardness and wear characteristics. This thesis investigates the combination of a high power laser beam and an electric arc to produce new surfaces on aluminium alloys. READ MORE