Sökning: "ball milling"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden ball milling.

  1. 1. Process-induced disorder of pharmaceutical materials Mechanisms and quantification of disorder

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Samaneh Pazesh; Göran Alderborn; Jonas Berggren; Niklas Sandler; [2017]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Milling; Comminution; Powder flow; Amorphisation; Raman spectroscopy; Atomic force microscopy; Plastic stiffness; Elastic stiffness; Pharmaceutical Science; Farmaceutisk vetenskap;

    Sammanfattning : One of the most important prerequisites in the drug development is to attain a reproducible and robust product in terms of its nature, and its chemical and physical properties. This can be challenging, since the crystalline form of drugs and excipients can be directly transformed into the amorphous one during normal pharmaceutical processing, referred to as process-induced amorphisation or process-induced disorder. LÄS MER

  2. 2. Mechanical activation of clay a novel route to sustainable cementitious binders

    Detta är en avhandling från Luleå University of Technology

    Författare :Ilda Tole; Andrzej Cwirzen; Mirja Illikainen; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; clay; sustainability; mechanical activation; ball milling; supplementary cementitious materials; alkali-activated materials; Byggmaterial; Building Materials;

    Sammanfattning : EU Sustainable Development Strategy planned to achieve improvement of life-quality by promoting sustainable production and consumption of raw materials. On November 2018, EU Commission presented a long-term strategy, aiming among others a climate-neutral economy by 2050. Cement production is contributing to 6-10% of the anthropogenic CO2 emissions. LÄS MER

  3. 3. Non-contact measurements and modelling of milling machine tool vibrations

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Matti Rantatalo; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

    Sammanfattning : This thesis concerns the development of non-contact measurement methods and analysis of rotors. The methods have been verified and applied to milling machine spindles in order to investigate the speed dependency in the milling machine spindle dynamic. The research was financed by the Swedish Agency for Innovation Systems (Vinnova). LÄS MER

  4. 4. Novel Technique to Improve High-Velocity Cold Compaction Processing of Polymer Powders and Polymer-Based Nanocomposite High Performance Components

    Detta är en avhandling från Stockholm : KTH

    Författare :Bruska Azhdar; Bengt Stenberg; Leif Kari; Mikael Rigdahl; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polymer powders; nanocomposites; high-velocity compaction; high-energy ball milling; TECHNOLOGY Industrial engineering and economy Manufacturing engineering and work sciences Manufacturing engineering; TEKNIKVETENSKAP Industriell teknik och ekonomi Produktion och arbetsvetenskap Produktionsteknik;

    Sammanfattning : Compaction of polymer powders and polymer-based nanocomposites by uniaxial high-velocity cold compaction (HVC), by high-energy ball milling (HEBM) and using a novel technique, relaxation assists, was investigated with a focus on the process parameters, the compactibility characteristics, surface morphology and friction. The basic phenomena associated with HVC are explained and the general energy principle is introduced to explain the pull-out phenomenon, springback gradient, delay time, relative time of the pressure wave, and stick-slip phenomenon during the compaction process. LÄS MER

  5. 5. An Analysis of Machining System Capability and Its Link with Machined Component Quality

    Detta är en avhandling från Stockholm : KTH

    Författare :Tomas Österlind; Cornel-Mihai Nicolescu; Tatar Kourosh; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining System Capability; Elastic Linked System; Spiral Bevel Gear Face Milling; SRA - Production; SRA - Produktion;

    Sammanfattning : Machining components out of tolerances is of no use in competitiveproduction. The machining system sets the limitations of dimensionalaccuracy and surface quality of a machined component. The capabilityof the machining system describes these limits in terms of specifiedvalues. LÄS MER