Sökning: "grain size"

Visar resultat 21 - 25 av 308 avhandlingar innehållade orden grain size.

  1. 21. Manufacturing of heavy rings and large copper canisters by plastic deformation

    Författare :Hamzah Ssemakula; KTH; []
    Nyckelord :Pore closure; Effective strain; Hydrostatic pressure; New concept; Hot extrusion; Copper; Grain size; Canisters; Load;

    Sammanfattning : .... LÄS MER

  3. 22. Grain Morphology and Intergranular Structure of Si3N4 and Al2O3 Based Ceramics

    Författare :Håkan Björklund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; whiskers; stereology; electron microscopy; sintering; silicon nitride; quantitative microscopy; grain growth; ceramics; microstructure; aluminium oxide;

    Sammanfattning : This thesis concerns factors controlling the grain morphology in Si3N4 and Al2O3 based ceramics. The microstructures of the ceramics were characterized by scanning electron microscopy in combination with quantitative microscopy and stereologic methods. LÄS MER

  4. 23. Non-overlapping Germ-grain Models: Characteristics and Material Modelling

    Författare :Jenny Andersson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Poisson process; Convex sets; Material fatigue; Voronoi tessellation; Germ-grain process; Pair-correlation function; Mark-correlation function; Short cracks; Volume fraction; Germ-grain process;

    Sammanfattning : We consider three different non--overlapping germ--grain models, two of which are constructed in a similar fashion. These two models are generalisations of Mat\'ern's hard--core models. In both cases we start with a homogeneous Poisson process and use the points as centres of convex sets, grains, of the same shape. LÄS MER

  5. 24. Nano and Grain-Orientated Ferroelectric Ceramics Produced by SPS

    Författare :Jing Liu; Zhijian Shen; Pavol Sajgalik; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nano microstructure; grain-orientated microstructure; ferroelectric ceramics; Spark Plasma Sintering; Inorganic chemistry; Oorganisk kemi; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Nano-powders of BaTiO3, SrTiO3, Ba0.6Sr0.4TiO3, a mixture of the composition (BaTiO3)0.6(SrTiO3)0. LÄS MER

  7. 25. Machine Vision for Road Pavement Applications Bitumen Coverage and Grain Size Estimation

    Författare :Hanna Källén; Matematik LTH; []
    Nyckelord :;

    Sammanfattning : In this thesis some research questions regarding durability and quality of roads has been investigated. The questions are analyzed from an image analysis point of view and aims to be a complement to existing methods for analyzing asphalt. LÄS MER