Search for dissertations about: "Reduction-Carburization"

Found 2 swedish dissertations containing the word Reduction-Carburization.

  1. 1. Investigations of the Kinetics of Reduction and Reduction/Carburization of NiO-WO3 Precursors

    University dissertation from Stockholm : KTH

    Author : Hesham M. Ahmed; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Chemical engineering Metallurgical process and manufacturing engineering Metallurgical process engineering; TEKNIKVETENSKAP Kemiteknik Metallurgisk process- och produktionsteknik Metallurgisk processteknik; Reduction; Reduction-Carburization; Gas-solid Reactions; Kinetics; Hydrogen; Methane; Thermogravimetric analysis; Fluidized bed; Simulation; Thermal diffusivity; Thermal conductivity; Laser flash; Process Metallurgy; Processmetallurgi;

    Abstract : Kinetic studies of reduction of the mixtures of NiO and WO3 having different Ni/(Ni+W) molar ratios in flowing hydrogen gas were investigated by means of Thermo Gravimetric Analysis (TGA), Fluidized Bed (FB) technique as well as Thermal diffusivity measurements under isothermal conditions. In the case of TGA, the reaction progress was monitored by mass loss, while evolved gas analysis by a gas chromatograph was the indicator of the reaction progress in the case of FB. READ MORE

  2. 2. Processing of Nanostructured WC-Co Powders and Sintered Steels

    University dissertation from Stockholm : Materialvetenskap

    Author : Zongyin Zhang; KTH.; [2003]
    Keywords : Nanostructured powder; Chemical synthesis; Fe-Mn-Si steel; Fe-Cu swelling; Mechanical properties; Sintering parameters;

    Abstract : Processing of nanostructured WC-Co and W-Co powders,modelling of Fe-Mn-Si alloy, swelling of Fe-Cu alloy, andmechanical properties and sintering of Fe-Mn-Si steels havebeen studied in the present thesis.W-Co precursors made by chemical synthesis were used toproduce nanostructured WCCo and W-Co powders by calcination,reduction and carburization. READ MORE