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Toplam kayıt 31, listelenen: 1-10
Production of alpha-beta SiAlON-TiN/TiCN composites by gas pressure sintering
(Belgian Ceramic Society, 2004)
Due to the favorable properties possessed by novel alpha-beta SiAlONs, they are attractive materials for cutting tool applications. Such applications require materials with high hardness, high fracture toughness and high ...
Transmission electron microscopy studies of La2O3-doped alpha-SiAlON ceramics
(IOP Publishing LTD, 1999)
alpha-SiAlON is able to accommodate cations into its crystal structure if the cations are sufficiently small in size, thus helping to reduce the volume of the remnant grain boundary phase after processing. In this study, ...
Microstructural observation of overload effect on the fatigue crack growth of 2024-T3 Al-alloy
(IOP Publishing LTD, 2004)
Microstructural investigation of fracture surfaces after fatigue crack growth experiments on 2024-T3 centrally cracked specimens was carried out. Variable amplitude loadings were used with periodic overload cycles added ...
Orientation-dependent equilibrium film thickness at interphase boundaries in ceramic-ceramic composites
(IOP Publishing LTD, 1997)
Theoretical considerations of the Hamaker constant for the interaction of two media across a third suggest that the highly anisotropic nature of the refractive indices of a medium such as h-BN will produce an orientation ...
Metal-ceramic interface characterisation of capacitor-discharge joined alumina
(IOP Publishing LTD, 1999)
Capacitor discharge joining of ceramics offer bonding without the damaging effects of extended heating times. Microstructures formed in alumina-AlxNiyYz -alumina joints were investigated using a combination of EDX and PEELS ...
Transmission electron microscopy of interfaces in structural ceramic composites
(Blackwell Science LTD, 1999)
Ceramic composites based either on a particulate, fibre or a lamellar architecture are potentially useful as damage-tolerant high-temperature engineering materials. The ability of the interfaces in such systems to deflect ...
Scanning electron microscopy observations of fatigue crack growth retardation due to block overloads
(IOP Publishing LTD, 2001)
Fatigue crack propagation behaviour of 2024-T3 aluminium (Al) alloy under periodic overloads superimposed on constant amplitude loadings with R=0.5 and f=10 Hz was investigated by scanning electron microscopy (SEM). During ...
Mechanical properties of melt infiltrated boron carbide-aluminium composites
(Trans Tech Publications LTD, 2002)
Boron carbide (B4C)-aluminium (Al) composites were produced by melt infiltration of 2024-T3 series Al alloys into porous B4C compacts in the temperature range of 985 degrees -1370 degreesC under an inert atmosphere (Ar). ...
Wetting and non-wetting behaviour of silicon carbide grain boundaries
(Transtec Publications LTD, 1999)
Silicon carbide (SiC) grain boundaries have been observed to be free from intergranular films. On the basis of equilibrium film thickness calculations, it has been proposed elsewhere that because SiC has very high refractive ...
Performance of new alpha-beta SiAlONs in turning operations
(Trans Tech Publications LTD, 2002)
New alpha-beta SiAlON ceramics were produced, characterised and tested in turning operations of cast iron. Cutting speeds varied between 400-1200 m/min while feeding rates were between 0.3 to 0.5 mm/rev. The results were ...