Search for dissertations about: "TiAlN Coating"

Showing result 1 - 5 of 14 swedish dissertations containing the words TiAlN Coating.

  2. 1. Microstructural investigation of CVD TiAlN, TiN and WN coatings

    Author : Ren Qiu; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEM; XEDS; TiN; SEM; APT; TiAlN; coating growth; EBSD; WN; CVD;

    Abstract : High speed machining of workpiece materials puts extreme thermal and pressure loads onto the cutting tool inserts, which thus must possess both high hardness and good toughness. Nowadays, most cutting tools are made of cemented carbide substrates that are coated with wear-resistant coatings. READ MORE

  4. 2. Toward Energy-efficient Physical Vapor Deposition : Routes for Replacing Substrate Heating during Magnetron Sputtering by Employing Metal Ion Irradiation

    Author : Xiao Li; Grzegorz Greczynski; Ivan Petrov; Lars Hultman; Jyh-Wei Lee; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PVD; Magnetron sputtering; Thin films; HiPIMS; TiAlN; Energy efficiency;

    Abstract : In this Thesis, magnetron sputtering is perfected as an environmental-friendly deposition technique. I performed systematic studies of a novel approach - hybrid high-power impulse and dc magnetron co-sputtering (HiPIMS/DCMS) with metal-ion-synchronized substrate bias pulses. READ MORE

  5. 3. Electron Microscopy Investigation of Detailed Microstructures of CVD TiAlN and TiN Coatings - Effects of Gas Flow and Substrate on Coating Microstructure

    Author : Ren Qiu; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CVD; SEM; coating growth; EBSD; TEM;

    Abstract : This thesis contains studies of topics of relevance to increase the understanding of TiN and TiAlN coatings synthesized by chemical vapour deposition (CVD) and low pressure CVD (LPCVD), respectively. This work contains two parts: (i) nanolamella LPCVD TiAlN coatings that were found to show a spatial variation of their chemical composition and microstructure, which was influenced by the gas flow speed of reactants; (ii) microstructure of CVD TiN coating deposited onto a CoCrFeNi multi-principal element alloy (MPEA)substrate. READ MORE

  6. 4. Wear of coated and uncoated PCBN cutting tool used in turning and milling

    Author : Susanne Sveen; Mikael Olsson; Magnus Odén; Urban Wiklund; Högskolan Dalarna; []
    Keywords : PCBN; PVD coating; Wear mechanisms; Tool wear; Metal cutting; Steel Forming and Surface Engineering; Stålformning och ytteknik;

    Abstract : This licentiate thesis has the main focus on evaluation of the wear of coated and uncoated polycrystalline cubic boron nitride cutting tool used in cutting operations against hardened steel. And to exam the surface finish and integrity of the work material used. READ MORE

  7. 5. Microstructural evolution of TiAlN hard coatings at elevated pressures and temperatures

    Author : Niklas Norrby; Magnus Odén; Mats Johansson; Jean-François Pierson; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : A typical hard coating on metal cutting inserts used in for example turning, milling or drilling operations is TiAlN. At elevated temperatures, TiAlN exhibits a well characterized spinodal decomposition into coherent cubic TiN and AlN rich domains, which is followed by a transformation from cubic to hexagonal AlN. READ MORE