Essays about: "Värmebehandling"

Showing result 21 - 25 of 45 essays containing the word Värmebehandling.

  1. 21. Aging of FeCrAl Surface Coatings

    University essay from KTH/Materialvetenskap

    Author : Fadi Alsaifi; [2019]
    Keywords : Coating surface; FECRAL alloys; overlay welding; hvaf; thermal spraying; porosity; oxidation; corrosion MIG; TIG; HVOF;

    Abstract : This Thesis is about the aging of FECRAL surface coatings. In this thesis various substrates have been investigated such as 16 Mo3, 304, 347, Sanicro 31, 800HT, Nikrothal 80 and Kanthal APMT. READ MORE

  3. 22. 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. 23. Design and Fabrication of 1550 nm Photonic Crystal Surface Emitting Lasers

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

    Author : João Martins de Pina; [2018]
    Keywords : Photonic crystal; surface-emitting laser; metal organic chemical vapour deposition; III-V semi- conductors; light emitting diode.;

    Abstract : In this study, the design and fabrication of a monolithic InP-based 1550-nm photonic-crystal surfaceemitting laser (PCSEL) is reported. The device is composed by an InGaAsP multi-quantum well (MQW) active layer and InP photonic crystal (PhC) formed by metal organic chemical vapour deposition (MOCVD). READ MORE

  5. 24. Residual stresses in Ti-6Al-4V from low energy laser repair welding

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Peter Ericson; [2018]
    Keywords : Micro laser welding; Low energy welding; Ti-6Al-4V; Ti64; Residual stress; Response Surface Methodology; Repair welding; Welding simulation; Mikrolasersvetsning; Lågenergetisk svetsning; Lågenergisvets; Ti-6Al-4V; Ti64; Restspänningar; Response Surface Methodology; Reparationssvets; Svetssimulering;

    Abstract : Millimeterstora och svårupptäckta defekter kan uppstå internt i stora och komplexa gjutgods av Ti-6Al-4V, ibland går dessa oupptäckta tills detaljen genomgått mekanisk bearbetning och en stor kostnad redan har gått in i den. Dessa defekter och andra industriella olyckshändelser leder till ett behov av additiva reparationsmetoder där den för tillfället rådande metoden är TIG-svetsning. READ MORE

  6. 25. Värmebehandling av ekollon (Quercus robur L) och dess påverkan på grobarhet och vitalitet hos unga plantor

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Nils-Erik Norrby; [2018]
    Keywords : oak; aerated steam treatment; pedunculate oak Quercus robur; acorn; germination; vitality;

    Abstract : Regeneration of pedunculate oak, Quercus robur, is hampered due to uneven supplies of acorns, infectious fungi and a generally low germination percentage of acorns. Aerated steam treatment was tested on acorns collected in southeast Sweden in order to determine if this method improves germination. READ MORE