Sökning: "Rietveld refinement"

Hittade 3 uppsatser innehållade orden Rietveld refinement.

  1. 1. Additively Manufactured Rare Earth Free Permanent Magnets

    Master-uppsats, Uppsala universitet/Tillämpad materialvetenskap; Uppsala universitet/Oorganisk kemi

    Författare :Himesha Abenayake; [2023]
    Nyckelord :additive manufacturing; MnAl; MnAl C ; rare earth free permanent magnets; selective laser melting; SLM; MnAl-based permanent magnets;

    Sammanfattning : It’s well known that MnAl(C) material consists of a metastable phase (τ) with promising ferromagnetic properties, produced either by controlled cooling from the high-temperature hexagonal ε-phase or rapid cooling that freezes the ε-phase followed by low-temperature annealing. Due to the high cooling rates involved, additive manufacturing (AM) especially selective laser melting (SLM), has been identified as a possible method to retain the high-temperature ε-phase, hence containing a potential capacity to produce permanent magnets upon low-temperature annealing. LÄS MER

  3. 2. Separate Calcination in Cement Clinker Production : A laboratory scale study on how an electrified separate calcination step affects the phase composition of cement clinker

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Amanda Vikström; [2021]
    Nyckelord :Cement; Cement clinker; Calcination; Separate calcination; Electrification; CO2 atmosphere; Product quality; Product characterization; XRD; HT-XRD; Rietveld refinement;

    Sammanfattning : Cement production is responsible for around 7% of the global anthropogenic carbon dioxide emissions. More than half of these emissions are due to the unavoidable release of carbon dioxide upon thermal decomposition of the main raw material limestone. LÄS MER

  4. 3. Internal strain in the magnetocaloric alloy MnCoSi

    Master-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Olivia Vaerst; [2021]
    Nyckelord :MnCoSi; Magnetocaloric Effect; Arc Melting; Strain; X-Ray Diffraction; Williamson-Hall; Rietveld Refinement; Physics and Astronomy;

    Sammanfattning : Cooling systems based on magnetic refrigeration are a promising and environmentally friendly alternative to commonly used gas-compression refrigeration. Magnetic refrigeration is based on the magnetocaloric effect. LÄS MER