Sökning: "yttria-stabilized zirconia"

Visar resultat 11 - 15 av 31 avhandlingar innehållade orden yttria-stabilized zirconia.

1. 11. Physical Vapor Deposition of Yttria-Stabilized Zirconia and Gadolinia-Doped Ceria Thin Films for Fuel Cell Applications

   Författare :Steffen Sønderby; Per Eklund; Hans Högberg; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : In this thesis, reactive sputter deposition of yttria-stabilized zirconia (YSZ) and cerium gadolinium oxide (CGO) thin films for solid oxide fuel cell (SOFC) applications have been studied. All films have been deposited under industrial conditions.YSZ films were deposited on silicon wafers as well as commercial NiO-YSZ fuel cell anodes. LÄS MER

3. 12. Ionic Transport in Metal Oxides Studied in situ by Impedance Spectroscopy and Cyclic Voltammetry

   Författare :Johan Öijerholm; Jinshan Pan; Jürgen Fleig; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ionic transport; alumina; zirconia; in situ impedance spectroscopy; molecular dynamics; high temperature cyclic voltammetry; spark plasma sintering; initial oxidation; FeCrAl alloy; grain size; space charge model.; Electrochemistry; Elektrokemi;

   Sammanfattning : Ionic transport in metal oxides is crucial for the functioning of a broad range of different components, such as heat resistant alloys designed for high temperature applications and oxide electrolytes in solid oxide fuel cells. This thesis presents results from in situ electrochemical studies of properties related to ionic transport in metal oxides that are important for their applications as protective oxides and ionic conductors. LÄS MER

4. 13. On core and bi-layered all-ceramic fixed dental prostheses, design and mechanical properties : studies on stabilized zirconiumdioxide

   Författare :Deyar Mahmood Jallal Hadi; Malmö högskola; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Y-TZP; Zirconia; All-ceramic FDPs; connector design; radius; state-of-the-art; CAD CAM; multi-layer technique; veneering ceramic; split-file; over-pressing; dental porcelain; MECHANICAL PROPERTIES;

   Sammanfattning : Loss of teeth can affect a person’s self-esteem, social life, appearance and oral function. Reconstruction of a missing tooth has scientifically been shown to increase self-esteem and quality of life and to maintain oral function. For many patients a fixed dental prostheses (FDP) is preferred, either tooth- or implant-supported. LÄS MER

5. 14. The Submerged Entry Nozzle : A Study of how to Reduce Decarburization and Clogging

   Författare :Jennie Svensson; Pär Jönsson; Voicu Brabie; Johan Björkvall; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap; Steel Forming and Surface Engineering;

   Sammanfattning : During continuous casting the submerged entry nozzle (SEN) is one of the critical points. This since sequence casting is favourable, clogging of the SEN results in fever sequences or aborted castings. In this study the preheating of SEN has been evaluated at different steel plants. LÄS MER

7. 15. Design of Microstructures in Thermal Barrier Coatings : A Modelling Approach

   Författare :Mohit Kumar Gupta; Per Nylén; Robert Vaβen; Högskolan Väst; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal barrier coatings; microstructure; thermal conductivity; Young‘s modulus; lifetime; finite element modelling; design; Manufacturing and materials engineering; Produktions- och materialteknik;

   Sammanfattning : Plasma sprayed Thermal Barrier Coating systems (TBCs) are commonly used for thermal protection of components in modern gas turbine application such as power generation, marine and aero engines. The material that is most commonly used in these applications is Yttria Stabilized Zirconia (YSZ) because of this ceramic’s favourable properties, such as low thermal conductivity, phase stability to high temperature, and good erosion resistance. LÄS MER