Search for dissertations about: "ion segregation"

Showing result 6 - 10 of 18 swedish dissertations containing the words ion segregation.

  2. 6. GaN, AlGaN, GaNAs and Related Heterostructures Grown by Molecular Beam Epitaxy

    Author : Hyonju Kim; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; surface segregation; GaNAs; plasma-assisted MBE; stacking fault; AlGaN GaN; heterointerface; unintentional impurities; III-nitrides;

    Abstract : This work deals with growth and characterization of III-nitrides and related heterostructures as well as GaNAs alloys grown by plasma assisted molecular beam epitaxy (MBE). The III-nitrides belong to the wide bandgap semiconductors due to their large energy bandgap spanning from 1.9 to 6.2 eV. READ MORE

  4. 7. High Resolution Microanalysis of Creep Resistant 9-12% Chromium Steels

    Author : Lars Lundin; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; martensitic stainless steel; TEM; modified 12% chromium steel; creep resistant; atom-probe field-ion microscopy;

    Abstract : This thesis deals with detailed studies of the microstructure of 9-12% chromium steels. Three alloys with improved creep resistance have been studied in different stages of heat treatment and after creep testing. Two of them were manufactured using PM/HIP and were of the type 10. READ MORE

  5. 8. Refractory High-entropy Alloy and Nitride Thin Films

    Author : Rui Shu; Per Eklund; Arnaud Le Febvrier; Alfred Ludwig; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; High-entropy alloy; nitrides; magnetron sputtering; superconductor; irradiation-tolerance; protective coating.;

    Abstract : This thesis focuses on understanding the process-structure-property relation-ships for several refractory-metal-based high-entropy alloys and nitrides synthesized by magnetron sputtering.  The thesis begins with the growth of TiZrNbTaNx understoichiometric nitrides by controlling substrate temperature and nitrogen flow ratio fN. READ MORE

  6. 9. Anisotropic Protein Interactions in Salt Solutions and at Interfaces: Coarse Grained Modeling

    Author : Anil Kurut Sabanoglu; Beräkningskemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Anisotropic interactions; protein electrostatics; phase association; surface adsorption; coarse grained models; Monte Carlo simulations;

    Abstract : Anisotropic protein interactions have a strong orientation dependence resulting from an uneven distribution of charged and hydrophobic residues on the protein surface. They play an important role in protein behaviors such as protein association, surface adsorption and phase separation. READ MORE

  7. 10. Cantor-Alloy-Based Multicomponent Nitride Thin Films

    Author : Smita Gangaprasad Rao; Per Eklund; Arnaud Le Febvrier; Yutao Pei; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Thin films; Multicomponent alloys; Magnetron sputtering;

    Abstract : In this Thesis, I have investigated multicomponent alloy based thin films synthesized by magnetron sputtering. The studies in the thesis are centered around the phase diagram of the CrFeCoNi nitrogen containing system. READ MORE