Sökning: "titanium nitride"

Visar resultat 16 - 20 av 41 avhandlingar innehållade orden titanium nitride.

1. 16. Synthesis and In Situ ToF-LEIS Analysis of Ultrathin Silicides and Ti-based Films

   Författare :Philipp Mika Wolf; Daniel Primetzhofer; Zhen Zhang; Eduardo Pitthan; Tuan Thien Tran; Anders Hallén; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ion scattering; in situ characterization; nickel silicide; ultrathin metal silicide; epitaxial silicide; surface analysis; titanium based films; high-resolution depth profiling;

   Sammanfattning : Thin films and coatings play a significant role in today’s society, with applications in electronics, optics, mechanics, and biomedicine. Further advancement in the field of surface coatings requires a good understanding of the unique features of ultrathin films and surfaces, which can only be reached with analysis techniques capable of resolving composition and morphology on a sub-nm scale. LÄS MER

3. 17. 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

4. 18. 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

5. 19. Silicon dioxide and aluminium nitride as gate dielectric for high temperature and high power silicon carbide MOSFETs

   Författare :Carl-Mikael Zetterling; KTH; []
   Nyckelord :;

   Sammanfattning : Silicon carbide (SIC) is a wide bandgap semiconductor thathas been suggested as a replacement for silicon in applicationsusing high voltages, high frequencies, high temperatures orcombinations thereof. Several basic process steps need to bedeveloped for reliable manufacturing of long-term stableelectronic devices. LÄS MER

7. 20. Circumventing Spectrum Mismatch - Studies of Triplet-Triplet Annihilation Upconversion, Singlet Fission and Two-Photon Absorption in Photoactive Materials

   Författare :Deise Fernanda Barbosa de Mattos; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; singlet fission; solar energy conversion; two-photon absorption; energy transfer; triplet-triplet annihilation upconversion; spectroscopy.; carbon nitride quantum dots; self-assembly gels; photochemistry;

   Sammanfattning : Solar energy stands out for its potential to supply the global energy demand by itself. Therefore, it is of great value to expand the use of processes that involve light such as conversion to electricity or fuels, or to drive high-energy reactions. LÄS MER