Abstract
The influence of the sintering additive LiYO2 (5– 15 wt.%) on sintering behavior, microstructure and mechanical properties of Si3N4 ceramics was investigated. Since LiYO2 enables densification of Si3N4 at extraordinarily low temperatures, sintering was carried out in the range from 1200– 1700 °C. Densification was found to be enhanced with increasing additive content due to an increasing volume fraction of the liquid. The phase transformation and grain growth occurred through a solution-reprecipitation mechanism, where the precipitation took place preferentially on pre-existing β-Si3N4 nuclei (of which the starting powder already contained 20 wt.%). The indentation fracture toughness increased with both sintering time and additive content as a result of the growth of elongated grains.
The authors are grateful to the Max-Planck-Gesellschaft as well as to Ministry of Science and Environmetal Protection of Serbia for financial support.
References
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© 2006 Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Editorial
- Nanoindentation creep and stress relaxation tests of polycarbonate: Analysis of viscoelastic properties by different rheological models
- Investigation of SiO2 thin films on Si substrates for use as standards for laser-acoustic measuring devices
- Determination of the critical tensile stress of sapphire by spherical indentation with additional lateral forces
- The deformation behaviour of electrodeposited nanocrystalline Ni in an atomic force microscope with a newly developed in situ bending machine
- In situ electrochemical nanoindentation of a nickel (111) single crystal: hydrogen effect on pop-in behaviour
- Indentation behaviour of (011) thin films of III–V semiconductors: polarity effect differences between GaAs and InP
- Multiwall carbon nanotubes-based composites – mechanical characterization using the nanoindentation technique
- Nanoindentation studies of stamp materials for nanoimprint lithography
- Experimental and thermodynamic evaluation of the Co–Cr–C system
- Thermodynamics of high-temperature cuprous sulfide
- Sintering of Si3N4 with Li-exchanged zeolite additive
- Effect of LiYO2 addition on sintering behavior and indentation properties of silicon nitride ceramics
- Mechanism of quasi-viscous flow of zinc single crystals
- The absolute thermoelectric power of chromium, molybdenum, and tungsten
- Modelling of metal – mould interface resistance in the Al-11.5 wt.% Si alloy casting process
- Award/Preisverleihung
- Personal
- Conferences
- Contents
- Editorial
- Editorial
- Basic
- Nanoindentation creep and stress relaxation tests of polycarbonate: Analysis of viscoelastic properties by different rheological models
- Investigation of SiO2 thin films on Si substrates for use as standards for laser-acoustic measuring devices
- Determination of the critical tensile stress of sapphire by spherical indentation with additional lateral forces
- The deformation behaviour of electrodeposited nanocrystalline Ni in an atomic force microscope with a newly developed in situ bending machine
- In situ electrochemical nanoindentation of a nickel (111) single crystal: hydrogen effect on pop-in behaviour
- Indentation behaviour of (011) thin films of III–V semiconductors: polarity effect differences between GaAs and InP
- Multiwall carbon nanotubes-based composites – mechanical characterization using the nanoindentation technique
- Nanoindentation studies of stamp materials for nanoimprint lithography
- Experimental and thermodynamic evaluation of the Co–Cr–C system
- Applied
- Thermodynamics of high-temperature cuprous sulfide
- Sintering of Si3N4 with Li-exchanged zeolite additive
- Effect of LiYO2 addition on sintering behavior and indentation properties of silicon nitride ceramics
- Mechanism of quasi-viscous flow of zinc single crystals
- The absolute thermoelectric power of chromium, molybdenum, and tungsten
- Modelling of metal – mould interface resistance in the Al-11.5 wt.% Si alloy casting process
- Kösterpreis
- Award/Preisverleihung
- Notifications
- Personal
- Conferences
Artikel in diesem Heft
- Contents
- Editorial
- Nanoindentation creep and stress relaxation tests of polycarbonate: Analysis of viscoelastic properties by different rheological models
- Investigation of SiO2 thin films on Si substrates for use as standards for laser-acoustic measuring devices
- Determination of the critical tensile stress of sapphire by spherical indentation with additional lateral forces
- The deformation behaviour of electrodeposited nanocrystalline Ni in an atomic force microscope with a newly developed in situ bending machine
- In situ electrochemical nanoindentation of a nickel (111) single crystal: hydrogen effect on pop-in behaviour
- Indentation behaviour of (011) thin films of III–V semiconductors: polarity effect differences between GaAs and InP
- Multiwall carbon nanotubes-based composites – mechanical characterization using the nanoindentation technique
- Nanoindentation studies of stamp materials for nanoimprint lithography
- Experimental and thermodynamic evaluation of the Co–Cr–C system
- Thermodynamics of high-temperature cuprous sulfide
- Sintering of Si3N4 with Li-exchanged zeolite additive
- Effect of LiYO2 addition on sintering behavior and indentation properties of silicon nitride ceramics
- Mechanism of quasi-viscous flow of zinc single crystals
- The absolute thermoelectric power of chromium, molybdenum, and tungsten
- Modelling of metal – mould interface resistance in the Al-11.5 wt.% Si alloy casting process
- Award/Preisverleihung
- Personal
- Conferences
- Contents
- Editorial
- Editorial
- Basic
- Nanoindentation creep and stress relaxation tests of polycarbonate: Analysis of viscoelastic properties by different rheological models
- Investigation of SiO2 thin films on Si substrates for use as standards for laser-acoustic measuring devices
- Determination of the critical tensile stress of sapphire by spherical indentation with additional lateral forces
- The deformation behaviour of electrodeposited nanocrystalline Ni in an atomic force microscope with a newly developed in situ bending machine
- In situ electrochemical nanoindentation of a nickel (111) single crystal: hydrogen effect on pop-in behaviour
- Indentation behaviour of (011) thin films of III–V semiconductors: polarity effect differences between GaAs and InP
- Multiwall carbon nanotubes-based composites – mechanical characterization using the nanoindentation technique
- Nanoindentation studies of stamp materials for nanoimprint lithography
- Experimental and thermodynamic evaluation of the Co–Cr–C system
- Applied
- Thermodynamics of high-temperature cuprous sulfide
- Sintering of Si3N4 with Li-exchanged zeolite additive
- Effect of LiYO2 addition on sintering behavior and indentation properties of silicon nitride ceramics
- Mechanism of quasi-viscous flow of zinc single crystals
- The absolute thermoelectric power of chromium, molybdenum, and tungsten
- Modelling of metal – mould interface resistance in the Al-11.5 wt.% Si alloy casting process
- Kösterpreis
- Award/Preisverleihung
- Notifications
- Personal
- Conferences