Sökning: "single-crystal"

Visar resultat 1 - 5 av 167 avhandlingar innehållade ordet single-crystal.

  1. 1. Nickel-Based Single-Crystal Superalloys the crystal orientation influence on high temperature properties

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Mikael Segersäll; Linköpings universitet.; Linköpings universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Superalloys are a group of materials that are used in high temperature applications, for example gas turbines and aero engines. Gas turbines are most commonly used for power generation, and it is only the very critical components which are exposed to the most severe conditions within the turbine, which are made from superalloy material. LÄS MER

  2. 2. Single-crystal Mo/V superlattices : growth, structure, and hydrogen uptake

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Jens Birch; Linköpings universitet.; Linköpings universitet.; [1994]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Fundamental studies concerning the growth, structural characterization and hydrogen uptake of single-crystal (00 l )-oriented Mo/V superlattices have been performed. The superlattices were grown by dual-target magnetron sputtering in pure Ar-atmosphere < 6·10-3 Torr on (001)-oriented MgO substrates. LÄS MER

  3. 3. Experimental Studies of Charge Transport in Single Crystal Diamond Devices

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Saman Majdi; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Single crystal diamond; carrier transport; CVD diamond; time-of-flight; mobility; IR detector; compensation; diamond diode; drift velocity; thermal detector;

    Sammanfattning : Diamond is a promising material for high-power, high-frequency and high- temperature electronics applications, where its outstanding physical properties can be fully exploited. It exhibits an extremely high bandgap, very high carrier mobilities, high breakdown field strength, and the highest thermal conductivity of any wide bandgap material. LÄS MER

  4. 4. Crystal plasticity and crack initiation in a single-crystal nickel-base superalloy Modelling, evaluation and appliations

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Daniel Leidermark; Linköpings universitet.; Linköpings universitet.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Single-crystal superalloy; Crystal plasticity; Fatigue crack initiation; Critical plane model; Theory of critical distance; Rafting; Tension compression asymmetry;

    Sammanfattning : In this dissertation the work done in the projects KME-410/502 will be presented.The overall objective in these projects is to evaluate and develop tools for designingagainst fatigue in single-crystal nickel-base superalloys in gas turbines. LÄS MER

  5. 5. On Thermomechanical Fatigue of Single-Crystal Superalloys

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Mikael Segersäll; Linköpings universitet.; Linköpings universitet.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Thanks to their excellent mechanical and chemical properties at temperatures up to 1000 °C, nickel-based superalloys are used in critical components in high-temperature applications such as gas turbines and aero engines. One of the most critical components in a gas turbine is the turbine blade, and to improve the creep and fatigue properties of this component, it is sometimes cast in single-crystal form rather than in the more conventional poly-crystalline form. LÄS MER