Search for dissertations about: "Materials science"

Showing result 1 - 5 of 1761 swedish dissertations containing the words Materials science.

  1. 1. Nanocomposites for Use in Sliding Electrical Contacts

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Benny André; Uppsala universitet.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tribology; materials science; Materialvetenskap; Materials Science; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Abstract : In this thesis nanocomposite materials for use in high performance electrical contacts are tested. Self mating silver as coatings on cupper substrates are the most used material combination in power connectors today. In this work two new concepts were tested. READ MORE

  2. 2. Biomimetic Formation of Calcium Phosphate Based Nanomaterials

    University dissertation from Chalmers University of Technology

    Author : Wenxiao He; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Calcium phosphate; lyotropic liquid crystal; bone-like apatite; biomimetic mineralization; self-assembly; nanocomposite; superstructure; amphiphilic peptide;

    Abstract : The intercellular material in bone is a nanocomposite of aligned “hard” inorganics—calcium phosphate (CaP) platelets embedded in the long-range ordered “soft” organic collagen matrix. This elaborate structural arrangement redeems the weaknesses of the individual components (being soft protein or brittle mineral) and gives bone its excellent mechanical properties for the protection and support of our bodies. READ MORE

  3. 3. Coated Ferritic Stainless Steels as Interconnects in Solid Oxide Fuel Cells - Material Development and Electrical Properties

    University dissertation from Chalmers University of Technology

    Author : Jan Gustav Grolig; Chalmers tekniska högskola.; Chalmers University of Technology.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SOFC; ASR; Interconnects; High Temperature Corrosion;

    Abstract : Solid oxide fuel cells (SOFCs) are attracting increasing interest as devices with potential uses in decentralized and clean electricity and heat production. Several challenges with respect to materials have to be overcome to achieve efficiencies and life-spans that are sufficient for long-term applications. READ MORE

  4. 4. Extracellular Matrix Based Materials for Tissue Engineering

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Cecilia Aulin; Uppsala universitet.; [2010]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Extracellular matrix; collagen synthesis; bioreactor; cell culture; bone morphogenetic protein-2; noggin; hyaluronan; cartilage; MEDICINE Physiology and pharmacology Physiology Medical technology; MEDICIN Fysiologi och farmakologi Fysiologi Medicinsk teknik; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Clinical genetics Molecular biology; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Klinisk genetik Molekylärbiologi; MEDICINE Surgery Surgical research Orthopaedics; MEDICIN Kirurgi Kirurgisk forskning Ortopedi; MEDICINE Surgery Surgical research Transplantation surgery; MEDICIN Kirurgi Kirurgisk forskning Transplantationskirurgi; MEDICINE Morphology; cell biology; pathology Morphology Biomaterials; MEDICIN Morfologi; cellbiologi; patologi Morfologi Biomaterial; MEDICINE Morphology; cell biology; pathology; MEDICIN Morfologi; cellbiologi; patologi; NATURAL SCIENCES Biology Cell and molecular biology; NATURVETENSKAP Biologi Cell- och molekylärbiologi; NATURAL SCIENCES Chemistry Organic chemistry Polymer chemistry; NATURVETENSKAP Kemi Organisk kemi Polymerkemi; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Materials chemistry; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Materialkemi; cellforskning; Cell Research; materialvetenskap; Materials Science; Medical Cell Biology; medicinsk cellbiologi; Orthopaedics; ortopedi;

    Abstract : The extracellular matrix is (ECM) is a network of large, structural proteins and polysaccharides, important for cellular behavior, tissue development and maintenance. Present thesis describes work exploring ECM as scaffolds for tissue engineering by manipulating cells cultured in vitro or by influencing ECM expression in vivo. READ MORE

  5. 5. On the Dielectric Losses of Polyethylene at Medium and High Frequencies

    University dissertation from Chalmers University of Technology

    Author : Martin Strååt; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; Övrig teknisk materialvetenskap; Other materials science; Dielectric properties; polyethylene; frequency; foaming; crystallinity; porosity;

    Abstract : Abstract As mobile communication moves from 3G to 4G, the bandwidth used will be extended from 2 GHz to 5 GHz. The propagation loss is related to the 2.6:th power of frequency, thus a large increase in power consumption may be expected. READ MORE