Essays about: "Al2O3"

Showing result 26 - 30 of 74 essays containing the word Al2O3.

  1. 26. Growth and Characterization of CrB2/TiB2 Superlattices by Magnetron Sputtering

    University essay from Linköpings universitet/Tunnfilmsfysik; Linköpings universitet/Tekniska fakulteten

    Author : Samira Dorri; [2019]
    Keywords : Thin films; diborides; superlattices; reflectivity; transition-metal diborides; CrB2; TiB2;

    Abstract : In the present work, growth and structural characterization of CrB2/TiB2 superlattices on (0001) Al2O3 substrate is studied. The superlattices are grown using a direct current magnetron sputtering (DCMS) system with a base pressure of <9E-7 Torr. READ MORE

  3. 27. Modeling and Analysis of the Shot Peening Process : a Study of the Residual Stresses in an Insert using the Finite Element Method

    University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Author : Hamid Torkaman; [2018]
    Keywords : Shot peening; Residual stresses; Cutting tool inserts; Post-coating treatment; Coated cemented carbide;

    Abstract : Cutting tool inserts are often coated with thin layers either through chemical vapor deposition (CVD) or physical vapor deposition (PVD) processes. In order to have a better wear resistance cutting tools are mostly subjected to post-coating treatment processes. READ MORE

  4. 28. Application of some modern analytical techniques for investigations of non-metallic inclusions in steel samples

    University essay from KTH/Materialvetenskap

    Author : Wan Zhiyue; [2018]
    Keywords : Non-metallic Inclusions; Electrolytic Extraction; Fractional Gas Analysis; Zirconium Addition; Calcium Treatment;

    Abstract : The non-metallic inclusions (NMI) have large influence on steel properties. Therefore, evaluation of inclusion size, number, composition and morphology by using modern analytical techniques are very important for control of steel production and steel quality. Three dimensional analysis method of electrolytic extraction is applied in this work. READ MORE

  5. 29. Electro-Optical Characterization of Passivated InAsP/InP Quantum Discs-in-Nanowire Heterostructures

    University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Author : Samareh Kordi Jazi; [2018]
    Keywords : Physics and Astronomy;

    Abstract : Semiconductor nanowires, with their quasi one-dimension geometry, inherently provide strain relaxation for heterogeneous integration and also strong light mode confinement. Nanowire-based photonic devices have also been demonstrated to offer significantly enhanced quantum efficiency, gain and reduced noise. READ MORE

  6. 30. Exploratory study of the interactions between textured alumina coatings and steel

    University essay from KTH/Materialvetenskap

    Author : Jonas Svantesson; [2018]
    Keywords : alpha Al2O3; diffusion couple; chemical wear; crater wear; DICTRA;

    Abstract : The crater wear of alumina coated WC-Co cutting tools is thought to be influenced by the chemical reactions between the coating and the workpiece material. Three different crystal orientations ((001), (012), and (100) of alpha alumina CVD coatings are examined in combination with four workpiece materials of steel to establish what reactions are present, and the extent of diffusion. READ MORE