Search for dissertations about: "oxide melts"

Showing result 1 - 5 of 9 swedish dissertations containing the words oxide melts.

  1. 1. Densities and viscosities of slags modeling and experimental investigations

    University dissertation from Stockholm : KTH

    Author : Mikael Persson; Seshadri Seetharaman; Rob Brooks; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; density; nolar volume; thermodynamics; enthalpies; model; slags; oxide melts; viscosity; mould flux; continuous casting; TECHNOLOGY Chemical engineering Metallurgical process and manufacturing engineering Metallurgical process engineering; TEKNIKVETENSKAP Kemiteknik Metallurgisk process- och produktionsteknik Metallurgisk processteknik;

    Abstract : The present dissertation describes part of the efforts directed towards the development of computational tools to support process modeling. This work is also a further development of the Thermoslag software developed in the Division of Materials Process Science, KTH. READ MORE

  2. 2. Ternary Block Copolymer Systems - Phase Behaviour and Phase Structure

    University dissertation from Birgitta Svensson, Physical Chemistry 1, Lund University

    Author : Birgitta Svensson; [1999]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical chemistry; lyotropic; thermotropic; SANS; SAXS; scattering; semicrystalline; reverse micelle; micellar solution; liquid crystalline; phase diagram; phase behaviour; block copolymer; pluronic; poly ethylene oxide ; poly propylene oxide ; quantum chemistry; Teoretisk kemi; kvantkemi;

    Abstract : Ternary isothermal (25°C) polyoxyalkylene triblock block copolymer ((EO)x(PO)y(EO)x where x is the number of ethylene oxide, EO, segments and y is the number of propylene oxide, PO, segments) systems with water and p-xylene as selective solvents for the PEO and PPO blocks, respectively, were chosen as study systems in this thesis as these ternary systems are good model systems for the self-assembly of block copolymers. The phase behaviour has been studied at varied block copolymer molecular weight and relative PEO/PPO block ratio. READ MORE

  3. 3. Parameters influencing inclusion compositions in Al-killed steel melts during a secondary refining process

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Takanori Yoshioka; Andrey Karasev; Pär Jönsson; Joohyun Park; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusion; ladle furnace; RH; thermodynamics; contact angle; Al2O3; MgO•Al2O3 spinel; calcium aluminate; CaS.;

    Abstract :      This study was carried out to clarify the factors influencing the evolution of inclusions in Al-killed steel melts during a secondary refining process. First, a case-hardening steel was the subject of study to understand the factors influencing the inclusion compositions in the steel melt. READ MORE

  4. 4. Deposit Induced Corrosion in Biofuel Combustion

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Petter Andersson; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ferritic steel; high temperature corrosion; superheater; waste combustion; CFB; biofuel boiler; waterwall; alkali chloride; deposit induced corrosion; chromate; nickel-based alloy; austenitic steel; martensitic steel; waste boiler;

    Abstract : Deposit induced corrosion is one of the main mechanisms for attack on heat exchangers in biofuel boilers. This severe corrosion decreases the obtainable steam temperature in boilers, thereby the efficiency in production of electricity is reduced. Deposit formation from the gas on superheater tubes are is generally referred to as fouling. READ MORE

  5. 5. Thermodynamic description of the Fe-C-Cr-Mn-Ni-O system

    University dissertation from Stockholm : KTH

    Author : Lina Kjellqvist; Malin Selleby; Bengt Hallstedt; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermodynamic modelling; thermodynamic assessment; Calphad; phase diagram; spinel; compound energy formalism; ionic two-sublattice liquid model; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Abstract : The Fe-C-Cr-Mn-Ni-O system is of fundamental importance when describing the influence of oxygen on high alloyed steels. Both solid and liquid phases are of great interest: The solid phases regarding oxidation processes like the formation of oxide layers, inner oxidation, sintering processes and high temperature corrosion. READ MORE