Search for dissertations about: "WC"

Showing result 1 - 5 of 68 swedish dissertations containing the word WC.

  1. 1. Aqueous Processing of WC-Co Powders

    University dissertation from Stockholm : Kemi

    Author : Karin M. Andersson; KTH.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Hard Metal; Cemented Carbide; WC-Co; Tungsten Carbide; Cobalt; Oxidation; Dissolution; Surface Complexation; XPS; AFM; Colloidal Probe; Hamaker Constant; Cauchy; WO3; CoOOH; ESCA; Zeta-Potential; Surface Potential; Poly ethylene imine ; PEI; Suspensi;

    Abstract : The object of this work is to obtain a fundamentalunderstanding of the principal issues concerning the handlingof an aqueous WC-Co powder suspension.The WO3 surface layer on the oxidised tungsten carbidepowder dissolves at pH>3 with the tungsten concentrationincreasing linearly with time. READ MORE

  2. 2. Aqueous Processing of WC-Co Powders Aqueous processing of WC-Co powders

    University dissertation from Stockholm : Materialvetenskap

    Author : Karin Andersson; KTH.; [2001]
    Keywords : Hard metal; cemented carbide; WC-Co; tungsten oxide; tungsten carbide; oxidation; cobalt; dissolution; surface complexation; XPS; AFM; colloidal probe; force curve; Hamaker constant; Cauchy; WO3; CoOOH; CoO; Co3O4; ESCA; zeta-potential; surface poten;

    Abstract : The object of this work is toobtain a fundamental understanding of the principal issuesconcerning the handling of WC-Co powders, in an aqueousmedium.The oxidation and dissolution oftungsten carbide powder dispersed in water was investigatedusing X-ray Photoelectron Spectroscopy (XPS) and leachingstudies. READ MORE

  3. 3. Atomistic modeling of interfaces in WC-Co cemented carbides

    University dissertation from Stockholm : Materialvetenskap

    Author : Martin Petisme; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; analytic bond order potentials; weing; WC-Co; grain boundary sliding; grain boundaries; density functional theory; molecular dynamics; interfaces; cemented carbides;

    Abstract : Grain and phase boundaries are crucial in understanding the properties of real materials. In this thesis, interfaces in WC–Co cemented carbide are modeled atomistically using density functional theory (DFT) and analytic interatomic potentials. READ MORE

  4. 4. Thermochemical processing of nanostructured W-Co and WC-Co powders

    University dissertation from Stockholm : Materialvetenskap

    Author : Zongyin Zhang; KTH.; [2001]
    Keywords : Nanostructured powder; WC-Co; W-Co; Co-precipitation; Chemical precursor; Calcination; Phase constitute; Processing; Calcination; Reduction; Carburization;

    Abstract : .... READ MORE

  5. 5. Carbide and MAX-Phase Engineering by Thin Film Synthesis

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jens-Petter Palmquist; Uppsala universitet.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; Thin films; microstructure; epitaxy; carbide; WC; MAX-phase; Ti3SiC2; DC magnetron sputtering; PVD; Reciprocal Space Mapping; RSM; Oorganisk kemi; NATURAL SCIENCES Chemistry Inorganic chemistry; NATURVETENSKAP Kemi Oorganisk kemi;

    Abstract : This thesis reports on the development of low-temperature processes for transition metal carbide and MAX-phase thin film growth. Magnetron sputtering and evaporation, far from thermodynamical equilibrium, have been utilised to engineer the properties of the films by physical and chemical control. READ MORE