Search for dissertations about: "grain"

Showing result 1 - 5 of 389 swedish dissertations containing the word grain.

  1. 1. WC grain growth during sintering of cemented carbides : Experiments and simulations

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Karin Mannesson; KTH.; [2011]
    Keywords : Cemented carbide; Grain growth; Abnormal grain growth; Image analysis; Modeling; 3-D grain size distribution; Inverse Saltykov; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Abstract : Cemented carbides are composite materials consisting of a hard carbide and a ductile binder. They are powdermetallurgically manufactured, where liquid-phase sintering is one of the main steps. The most common cemented carbide consists of WC and Co and it is widely used for cutting tools. READ MORE

  2. 2. On the Design and Analysis of Stream Ciphers

    University dissertation from Department of Electrical and Information Technology, P.O. Box 118, 221 00, Lund, Sweden

    Author : Martin Hell; Lunds universitet.; Lund University.; [2007]
    Keywords : bit-search generator; weak feedback polynomials; self-shrinking generator; Achterbahn; Pomaranch; Grain-128; Grain; stream ciphers; cryptography; cryptanalysis; Informatics; systems theory; Informatik; systemteori; MATEMATIK; MATHEMATICS;

    Abstract : This thesis presents new cryptanalysis results for several different stream cipher constructions. In addition, it also presents two new stream ciphers, both based on the same design principle. The first attack is a general attack targeting a nonlinear combiner. READ MORE

  3. 3. Spark Plasma Sintering Enhancing Grain Sliding, Deformation and Grain Size Control : Studies of the Systems Ti, Ti/TiB2, Na0.5 K0.5 NbO3, and Hydroxyapatite

    University dissertation from Stockholm : Department of Materials and Environmental Chemistry, Stockholm University

    Author : Mirva Eriksson; Stockholms universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Spark plasma sintering; plastic deformation; grain growth; titanium; TiB2; hydroxyapatite; Na0.5K0.5NbO3; ferroelectric; transparent; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Materials chemistry; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Materialkemi; Materials Chemistry; materialkemi;

    Abstract : The unique features of the Spark plasma sintering (SPS) were used to investigate the sintering and deformation behaviour of titanium and titanium–titanium diboride composites, and to control the sintering and grain growth of ferroelectric Na0.5K0.5NbO3 (NKN) and of hydroxyapatite (HAp). READ MORE

  4. 4. Spiral Grain in Norway Spruce

    University dissertation from Växjö : Växjö University Press

    Author : Harald Säll; Växjö universitet.; [2002]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Spiral grain angle; drying deformation; warp; wood quality; Norway spruce; Picea abies; FORESTRY; AGRICULTURAL SCIENCES and LANDSCAPE PLANNING; SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING;

    Abstract : Wood is a major construction material that is used in many contexts, and for different purposes. Serious problems may arise, however, when moisture related deformations as twist occur in wood used in different types of building structures, joinery and furniture. READ MORE

  5. 5. Inclusions and/or Particles Engineering for Grain Refining Purposes in Ferritic Fe-20mass%Cr alloys

    University dissertation from Stockholm : KTH

    Author : Jesper Janis; KTH.; [2010]
    Keywords : Inclusions; Particles; Grain size; High Cr; Ferritic; Grain refining; Solidification; Pinning effect; Stainless steel; Oxides; Nitrides; TECHNOLOGY Chemical engineering Metallurgical process and manufacturing engineering Metallurgical process engineering; TEKNIKVETENSKAP Kemiteknik Metallurgisk process- och produktionsteknik Metallurgisk processteknik;

    Abstract : Compared to more common used austenitic stainless steels, ferritic stainless steels contain very low amounts of the expensive alloying element Ni. In addition, they have good corrosion properties, but are sometimes suffering from poor weldability and bad mechanical properties. READ MORE