Search for dissertations about: "AlN"

Showing result 21 - 25 of 112 swedish dissertations containing the word AlN.

  2. 21. Thermal stability and mechanical properties of TiAlN-based multilayer and monolithic coatings

    Author : Axel Knutsson; Magnus Odén; Lennart Karlsson; Grégory Abadias; Linköpings universitet; []
    Keywords : ;

    Abstract : This thesis explores the thermal stability, microstructure, mechanical properties and cutting performance of multilayer and monolithic cubic TiAlN hard coatings. The aim is to increase the understanding of how the coatings’ microstructure and properties are affected by a layered structure when exposed to high temperatures. READ MORE

  4. 22. High temperature behavior of arc evaporated ZrAlN and TiAlN thin films

    Author : Lina Rogström; Magnus Odén; Lars Hultman; David Rafaja; Linköpings universitet; []
    Keywords : ;

    Abstract : Hard coatings can extend the life time of a tool substantially and enable higher cutting speeds which increase the productivity in the cutting application. The aim with this thesis is to extend the understanding on how the microstructure and mechanical properties are affected by high temperatures similar to what a cutting tool can reach during operation. READ MORE

  5. 23. Piezoelectric and ferroelectric device technologies for microwave oscillators

    Author : Martin Norling; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piezoelectrics; electrostrictive materials; microwave oscillators; thin film devices; ferroelectrics; thin film bulk acoustic resonators; ferroelectric varactors;

    Abstract : The purpose of this thesis is to investigate piezoelectric and ferroelectric thin film device technologies for application in microwave oscillators.Thin film varactors based on ferroelectric materials are considered. READ MORE

  6. 24. Mechanical and thermal stability of hard nitride coatings

    Author : Yu-Hsiang Chen; Magnus Odén; Lina Rogström; Tomasz Liskiewicz; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Hard coating’s thermal stability is essential due to the high temperature environment of high-speed cutting applications, while the phase and microstructure evolution induced by exposing the coating to high temperature affects the mechanical properties. In this thesis, the mechanical stability of arc-evaporated, hard, transition metal nitride coatings annealed at high temperature is analyzed and related to the phase and microstructure evolution. READ MORE

  7. 25. Epitaxial aluminum nitride thin films on 6H-silicon carbide, grown by magnetron sputter deposition

    Author : Sukkaneste Tungasmita; Linköpings universitet; []
    Keywords : ;

    Abstract : The research presented in this thesis is focused on epitaxial wurtzite-structure Aluminum Nitride (AlN) thin film synthesis, by ultra-high-vacuum (UHV) de magnetron sputter deposition, on Silicon Carbide (6H-SiC) substrates. The emphasis of the work has been put on controlling the growth and quality of the films to be able to use this material in electronic device applications. READ MORE