Sökning: "surface treatments"

Visar resultat 16 - 20 av 184 avhandlingar innehållade orden surface treatments.

  1. 16. Novel concepts for advanced CMOS Materials, process and device architecture

    Detta är en avhandling från Kista : Mikroelektronik och informationsteknik

    Författare :Dongping Wu; KTH.; [2004]
    Nyckelord :CMOS technology; MOSFET; high-k; gate dielectric; ALD; surface pre-treatment; metal gate; poly-SiGe; strained SiGe; surface-channel; buried-channel; notched gate;

    Sammanfattning : The continuous and aggressive dimensional miniaturization ofthe conventional complementary-metal-oxide semiconductor (CMOS)architecture has been the main impetus for the vast growth ofIC industry over the past decades. As the CMOS downscalingapproaches the fundamental limits, unconventional materials andnovel device architectures are required in order to guaranteethe ultimate scaling in device dimensions and maintain theperformance gain expected from the scaling. LÄS MER

  2. 17. Fatigue Properties of Additively Manufactured Alloy 718

    Detta är en avhandling från Trollhättan : University West

    Författare :Arun Ramanathan Balachandramurthi; Högskolan Väst.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue; Additive Manufacturing; Powder Bed Fusion; Superalloy; Microstructure; Surface roughness; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : Additive Manufacturing (AM), commonly known as 3D Printing, is a disruptive modern manufacturing process, in which parts are manufactured in a layer-wise fashion. Among the metal AM processes, Powder Bed Fusion (PBF) technology has opened up a design space that was not formerly accessible with conventional manufacturing processes. LÄS MER

  3. 18. Varestraint Weldability Testing of Cast Superalloys

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Sukhdeep Singh; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Varestraint; Welding; Alloy 718; HIP; Cast Superalloys; Hot Cracking; ATI® 718 PlusTM;

    Sammanfattning : Precipitation hardened Ni- and Ni-Fe- based superalloys, used in hot structural components for aero engines, are subjected to hot cracking phenomena during manufacturing and specifically in welding. This type of cracking involves metallurgical reactions from the liquid phase in concomitance to weld restraints. LÄS MER

  4. 19. Post-treatment of Alloy 718 produced by electron beam melting

    Detta är en avhandling från Trollhättan : University West

    Författare :Sneha Goel; Högskolan Väst.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Additive Manufacturing; Electron Beam Melting; Alloy 718; HIP; Heat Treatment; Solutionizing; Aging; HIP HT; Microstructure; γ ; δ; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : Electron beam melting (EBM), a metal additive manufacturing (AM) process, has received considerable industrial attention for near net shape manufacture of complex geometries with traditionally difficult-to-machine materials. This has fuelled considerable academic interest in investigating EBM of Alloy 718, a nickel ironbased superalloy possessing an exciting combination of good mechanical behaviour and cost effectiveness. LÄS MER

  5. 20. Laser cleaning as a conservation technique for corroded metal artifacts

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Yang Sook Koh; Luleå tekniska universitet.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Produktionsutveckling; Manufacturing Systems Engineering;

    Sammanfattning : Preservation of cultural property for the future is one of the most important activities of our society. The information which we can gather from such materials is a valuable key to understanding the past. Conservation is a process which includes a range of different treatments. LÄS MER