Sökning: "Al2O3"

Visar resultat 1 - 5 av 294 avhandlingar innehållade ordet Al2O3.

  1. 1. Microstructure of Alumina (Al2O3) Grown by Oxidation of FeCrAl Alloys and by Chemical Vapour Deposition

    Författare :Sead Canovic; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; γ-Al2O3; TiN; κ-Al2O3; TiC; FeCrAl alloys; CVD; oxidation; α-Al2O3;

    Sammanfattning : This thesis consists of two parts: the detailed microstructure of (i) CVD alumina multilayer coatings, and (ii) alumina scales formed on three different FeCrAl alloys. The coatings and oxide scales were characterized by using analytical electron microscopy and different surface analysis techniques. LÄS MER

  3. 2. The microstructure of chemically vapour deposited AL2O3 coatings

    Författare :Mats Halvarsson; Chalmers University of Technology; []
    Nyckelord :; ; microstructure; phase transformation; cemented carbides; multilayers; -Al2O3; CVD; TEM; -Al2O3;

    Sammanfattning : .... LÄS MER

  4. 3. Microstructure and Wear of CVD Coatings used in Metal Cutting Applications

    Författare :Andreas Larsson; Chalmers University of Technology; []
    Nyckelord :MTCVD; Ca-treated steel; EFTEM; CVD; TEM; Ti C; alfa-Al2O3; gamma-Al2O3; wear; kappa-Al2O3; N ; EELS;

    Sammanfattning : This thesis is concerned with the microstructural characterisation of wear resistant Al2O3 and Ti(C,N)coatings produced by chemical vapour deposition on cemented carbide cutting tools. The investigation focuses on the effect of deposition conditions on the microstructure and the microstructural evolution of the coatings during heat-treatments and metal cutting. LÄS MER

  5. 4. The microstructure and stability of CVD aluminia coatings

    Författare :Mats Halvarsson; Chalmers University of Technology; []
    Nyckelord :.kappa.-Al2O3; SEM; multilayers; TEM; .alpha.-Al2O3; phase transformation; CVD; XRD; microstructure;

    Sammanfattning : This thesis has examined topics of relevance for increasing the understanding of alumina coatings produced by Chemical Vapour Deposition. The work consists of three parts: (i) The microstructure of Al2O3 coatings; (ii) the .kappa.-Al2O3 -> . LÄS MER

  7. 5. A Study on Vanadium Extraction from Fe-V-P Melts Derived from Primary and Secondary Sources

    Författare :Mikael Lindvall; Du Sichen; Christiaan Pistorius; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vanadium; V; V2O5; V2O3; ferrovanadium; vanadiferous; titaniferous; titanomagnetites; magnetite; spinel; slag; experimental; free; spinel; converter; LD; BOF; solubility; equilibrium; selective; oxidation; hibonite; karelianite; Al2O3; CaO; SiO2; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Vanadium extraction methods were developed for iron-vanadium-phosphorus (Fe-V-P) melts derived from processing of V-bearing titanomagnetites and steel slags. Studies on phase relationships of V slags were carried out to provide important understanding of the extraction processes. LÄS MER