Search for dissertations about: "liquid-phase sintering"

Showing result 1 - 5 of 32 swedish dissertations containing the words liquid-phase sintering.

  2. 1. Liquid phase sintering of W-Ni-Fe composites : liquid penetration, agglomerate separation and tungsten particle growth

    Author : Anders Eliasson; Hasse Fredriksson; Thomas Gomez-Acebo; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Liquid phase sintering; heavy metal; particle composites; tungsten; penetration; agglomerate separation; particle interaction; parabolic flight; sounding rockets; microgravity; Kirkendall effect; Metallurgical process engineering; Metallurgisk processteknik;

    Abstract : The initial stage of liquid phase sintering, involving liquid penetration, agglomerate separation, particle spreading and growth has been investigated in experiments using tungsten heavy alloys. The particle composites used were produced by hot isostatic pressing (HIP) of pure powder mixtures of W-Ni-Fe-(Co). READ MORE

  4. 2. Optimizing liquid phase sintering of ferrous powder metallurgical materials

    Author : Henrik Borgström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface chemical analysis high speed steel; Vacuum annealing; nitrogen alloying; liquid phase sintering;

    Abstract : The properties of powder metallurgical, PM, components are dependent on that the dilemma of full density and suitable microstructure is resolved. Whilst it is often possible to achieve full density, it may or may not coincide with a suitable microstructure. READ MORE

  5. 3. Tailoring of Liquid Phase Sintering and Microstructure of Sintered Steel

    Author : Walid Khraisat; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermodynamics and persistent liquid; ferrous powder; liquid forming additives; liquid phase sintering; high speed steel powder;

    Abstract : The present study intends to interpret the effects of alloying elements on microstructure and mechanical properties via liquid phase sintering of iron and steel powders. The tools involved are thermodynamic modelling, tailoring of powder properties and processing, and optimisation of sintering. READ MORE

  6. 4. Computational Modeling of Liquid-Phase based on Homogenization

    Author : Mikael Öhman; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Homogenization; Liquid Phase Sintering; FE2;

    Abstract : Liquid-phase sintering is the process where a pre-compacted powder, "green body", is heated to the point where(a part of) the solid material melts, and the specimen shrinks while keeping (almost) net shape. In the case of hardmetal, the microstructure is defined by WC-Co-particles with large pores, whereby molten Co represents the liquid phase. READ MORE

  7. 5. On the interaction between liquid/ solid during sintering and solidification

    Author : Tomas Antonsson; KTH; []
    Keywords : liquid phase; sintering; heavy metal; tungsten; iron; nickel; penetration; solidification;

    Abstract : .... READ MORE