Essays about: "röntgendiffraktion"

Showing result 16 - 20 of 28 essays containing the word röntgendiffraktion.

  1. 16. Intermetallic Compound Formation in Ni-Ti-Fe Powder Mixtures

    University essay from Lunds universitet/Materialteknik

    Author : Tea Bertilsson; [2018]
    Keywords : Phase Evolution; Ni-Ti-Fe System; Intermetallics; Powder Metallurgy; Reactive Sintering; DSC; SEM; EDS; XRD; Technology and Engineering;

    Abstract : The Ni-Ti system has a broad range of applications, in areas as diverse as biomedicine and robotics. This is in large due to the NiTi intermetallic compound, which exhibits the shape memory effect. In addition to this property, the intermetallic compound is also biocompatible, has good mechanical properties and good corrosion resistance. READ MORE

  3. 17. Processing and characterization of self-aligned Ni/Al and Co ohmic contacts to 4H-SiC

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Andrea Ferrario; [2018]
    Keywords : ;

    Abstract : New self-aligned silicide processes for the realization of Ni/Al and Co contacts to silicon carbide (4H-SiC) are presented and contacts are characterized using the transfer length method (TLM). Since cobalt silicide formation on 4H-SiC has not been investigated before, interface reaction between Co and 4H-SiC as well as the study on the annealing temperatures constitute an essential part of this work. READ MORE

  4. 18. Alternative welding methods for nitrogen alloyed steel

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Anders Bertilsson; [2017]
    Keywords : Nitrogen alloyed tool steel; Uddeholm Vanax SuperClean; solid-state welding; direct-drive friction welding; friction stir welding; microstructure; Vickers microhardness testing; retained austenite measurement by X-ray diffraction; Kvävelegerat verktygsstål; Uddeholm Vanax SuperClean; trycksvetsning; friktionssvetsning; friktionsomrörningssvetsning; mikrostruktur; Vickers mikrohårdhetsmätning; restaustenitmätning med röntgendiffraktion;

    Abstract : This project explores the feasibility of the solid-state welding method direct-drive friction welding to be used as a joining method for the nitrogen alloyed steel Uddeholm Vanax SuperClean, produced via processes based on powder metallurgy. Vanax SuperClean cannot be welded using fusion welding methods where the base material melts, due to nitrogen escaping the material, resulting in inferior quality welds. READ MORE

  5. 19. Role of annealing and photostability of organo-metal-halide semiconductors for solar cell applications

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : David Sörell Jonsson; [2016]
    Keywords : materials chemistry; materialkemi; Chemistry;

    Abstract : Methyl ammonium lead halides (MAPbX3 , X=Cl-, Br-,I-), crystallizing in a perovskite structure, have in recent years been shown to be a promising material as a light harvesting material in solar cells. It has many interesting properties which makes it suitable for solar cell applications, such as near-optimal band gap and long electron-hole diffusion lengths, as well as the possibility of synthesizing the films from solution based methods. READ MORE

  6. 20. The Incidence and Associated Geotechnical Issues of Swelling Clay in Stockholm

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Anna Clark; Viktoria Clarin; [2015]
    Keywords : Tunnel stability; swelling clay; reinforcement; Söderström fault; swelling pressure; Tunnelstabilitet; svällande lera; förstärkning; Söderströmsförkastningen; svälltryck;

    Abstract : The Incidence and Associated Geotechnical Issues of Swelling Clay in Stockholm  Viktoria Clarin & Anna Clark  Previous tunnel failures have shown that inadequate reinforcement in tunnels can lead to cave-ins, whereby swelling clay is one of several factors that can result in these damages. Swelling clay minerals possess the ability to absorb water molecules and cations leading to an increase in volume. READ MORE