Sökning: "Spinodal"

Visar resultat 21 - 25 av 52 avhandlingar innehållade ordet Spinodal.

  1. 21. Arc evaporated wear-resistant nitride coatings for metal cutting tools

    Författare :Jacob Sjölén; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : This Thesis is dedicated to increase the understanding of arc evaporated PVD coatings as wear resistant layers on metal cutting tools. The approach is to study coatings that have excellent performance in metal cutting applications, specifically (Ti,Al)N and (Ti,Si)N in terms of thermal and mechanical properties, and to correlate this to their microstructure, stress state, and composition. LÄS MER

  3. 22. High pressure and high temperature behavior of TiAlN

    Författare :Niklas Norrby; Magnus Odén; Mats Johansson Johansson; Helen Blomqvist; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This licentiate thesis mainly reports about the behavior of arc evaporated TiAlN at high pressures and high temperatures. The extreme conditions have been obtained in metal cutting, multi anvil presses or diamond anvil cells. Several characterization techniques have been used, including x-ray diffraction and transmission electron microscopy. LÄS MER

  4. 23. Defects in Titanium Aluminum Nitride-Based Thin Films

    Författare :Janella Salamania; Magnus Odén; Lars Johnson; Lina Rogström; Zoe Barber; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thin films; Ti-Al-N; Defects; Physical vapor deposition;

    Sammanfattning : Coatings and thin films inherently contain several types of defects. This thesis aims to enhance the understanding of the relationship of defects on the growth, structure, stability, and properties of titanium aluminum nitride films synthesized by physical vapor deposition techniques. LÄS MER

  5. 24. Thermal stability and age hardening of TiN-based thin films

    Författare :Anders Hörling; Alan Matthews; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : The work presented herein is about characterizing phase transformations in cathodic arc plasma-deposited Ti1-xA1xN and Ti1-zZrzN thin films for cutting tool applications, and to investigate how the films' mechanical properties are affected by such transformations during thermal annealing. Post-deposition analyses were carried out using X-ray diffraction (XRD), transmission electron microscopy (TEM), nanoindentation, four-point probe sheet resistance, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and Rutherford backscattering spectrometry (RBS). LÄS MER

  7. 25. Phase stability and defect structures in (Ti,Al)N hard coatings

    Författare :Katherine M. Calamba; Magnus Odén; Jean Pierson; Mats Johansson; Gregory Abadias; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This study highlights the role of nitrogen vacancies and defect structures in engineering hard coatings with enhanced phase stability and mechanical properties for high temperature applications. Titanium aluminum nitride (Ti,Al)N based materials in the form of thin coatings has remained as an outstanding choice for protection of metal cutting tools due to its superior oxidation resistance and high-temperature wear resistance. LÄS MER