Sökning: "Time-of-flight secondary-ion-mass-spectrometry"

Visar resultat 21 - 25 av 33 avhandlingar innehållade orden Time-of-flight secondary-ion-mass-spectrometry.

  1. 21. Investigation of topography, adhesion and diffusion in sliding contacts during steel and titanium alloy machining

    Författare :Sara Saketi; Mikael Olsson; Högskolan Dalarna; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel Forming and Surface Engineering; Stålformning och ytteknik;

    Sammanfattning : The aim of the present thesis work is to increase the fundamental knowledge of the tribological contact between the cutting tool and the work material in three different cutting operations, i.e. hard milling of cold work tool steels, turning in 316L stainless steel and turning in Ti6Al4V alloy, respectively. LÄS MER

  3. 22. Investigation of Topography, Adhesion and Diffusion Wear in Sliding Contacts during Steel and Titanium Alloy Machining

    Författare :Sara Saketi; Staffan Jacobson; Mikael Olsson; Pavel Krakhmalev; Uppsala universitet; []
    Nyckelord :Tribology; Metal cutting; Cemented carbide; PCBN; CVD and PVD coatings; Sur-face topography; Wear mechanisms; Diffusion;

    Sammanfattning : The aim of the present thesis work is to increase the fundamental knowledge of the tribological contact between the cutting tool and the work material in three different cutting operations, i.e. hard milling of cold work tool steels, turning in 316L stainless steel and turning in Ti6Al4V alloy, respectively. LÄS MER

  4. 23. Application of copper corrosion inhibitors in mineral oil : Surface analytical studies and corrosion mitigation evaluations

    Författare :Martina Levin; Christofer Leygraf; Per Redelius; Roy Johnsen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This doctoral thesis explores the copper corrosion inhibiting properties of a number of nitrogen containing hetero-organic compounds in refined mineral oil. Traditional organic corrosion inhibitors, as well as novel and bioorganic compounds have been studied. LÄS MER

  5. 24. Aspects on wettability and surface composition of modified wood

    Författare :Lars-Elof Bryne; Ove Söderström; Charles R. Frihart; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wettability; contact angle; work of adhesion; Lewis acid-base; modified wood; Building engineering; Byggnadsteknik;

    Sammanfattning : Wood is often combined with other materials such as thermoplastics, adhesives and coatings. In general, combinations of wood and polymers especially in outdoor exposure have poor long-term durability. LÄS MER

  7. 25. Molecular, micro- and ultrastructural investigations of labile tissues in deep time

    Författare :Johan Gren; Berggrundsgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; eumelanin; fossils; histology; integument; IR microspectroscopy; melanin; melanosomes; molecular palaeontology; ToF-SIMS; XAS;

    Sammanfattning : This thesis comprises investigations of microstructures and molecular remains, preserved in a variety of fossil specimens. The results are presented in six papers, collectively aiming to thoroughly examine fossil traces of such remains by employing a combination of both established and relatively new analytical methods. LÄS MER