Sökning: "internal oxidation"

Visar resultat 1 - 5 av 106 avhandlingar innehållade orden internal oxidation.

  1. 1. Internal oxidation processing : New alloys and new simulation techniques

    Författare :Henrik Larsson; KTH; []
    Nyckelord :Internal oxidation; nitriding; diffusion; simulation; random walk; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Nitriding and oxidising treatments of alloys for toolingpurposes have been investigated both experimentally andtheoretically. Specimens prepared by a combination of differentprocessing steps are investigated by light-optical, scanningand transmission electron microscopy and hardness measurments. LÄS MER

  3. 2. Development of Methanol-Reforming Catalysts for Fuel Cell Vehicles

    Författare :Johan Agrell; KTH; []
    Nyckelord :PEM fuel cells; hydrogen; methanol; reforming; oxidation; reaction pathways; carbon monoxide;

    Sammanfattning : Vehicles powered by proton exchange membrane (PEM) fuelcells are approaching commercialisation. Being inherently cleanand efficient sources of power, fuel cells constitute asustainable alternative to internal combustion engines to meetfuture low-emission legislation. LÄS MER

  4. 3. A study on the Submerged Entry Nozzels (SEN) respecting clogging and decarburization

    Författare :Arashk Memarpour; Pär Jönsson; Sune Jansson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Refractory; SEN; Clogging; REM; Coating; glaze; alkaline; Refractory; ZrSi2; Graphite; Alumina; Oxidation; Al2O3-C; ZrO2-C; MgO-C; decarburization; reaction mechanism; Materials science; Teknisk materialvetenskap;

    Sammanfattning : The submerged entry nozzle (SEN) has been used to transport the molten steel from tundish to the mould. The main purpose of the SEN usage is both to prevent oxygen and nitrogen pick-up by molten steel and to achieve the desired flow condition in the mould. LÄS MER

  5. 4. The Buried Oxide of Silicon on Insulator Materials

    Författare :Per Ericsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oxide defects; internal oxidation; aluminum oxide; wafer bonding; SOI; silicon on insulator; buried oxide;

    Sammanfattning : The buried oxide of silicon on insulator (SOI) wafers plays an important role in the operation of electronic devices made on such materials. The presence of defects in the buried oxide can seriously degrade the performance of a circuit. LÄS MER

  7. 5. An Experimental Study of Submerged Entry Nozzles (SEN) Focusing on Decarburization and Clogging

    Författare :Arashk Memarpour; Pär Jönsson; Torbjörn Carlberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Refractory; SEN; Clogging; REM; Coating; glaze; alkaline; Post- Mortem; industrial preheating; ZrSi2; Graphite; Alumina; Oxidation; Al2O3-C; ZrO2-C; MgO-C; decarburization; reaction mechanism; Yttria Stabilized Zirconia; plasma spray-PVD coating;

    Sammanfattning : The submerged entry nozzle (SEN) is used to transport the molten steel from a tundish to a mould. The main purpose of its usage is to prevent oxygen and nitrogen pick-up by molten steel from the gas. Furthermore, to achieve the desired flow conditions in the mould. LÄS MER