Ara
Toplam kayıt 42, listelenen: 31-40
New heat treatment methods for glass removal from silicon nitride and sialon ceramics
(Kluwer Academic Publ, 2000)
Sialon ceramics were discovered simultaneously (but independently) in late 1971 at Newcastle University and also at the Toyota Research Laboratories in Japan. During the 30 years since their original discovery, the Newcastle ...
Luminescence properties of terbium-, cerium-, or europium-doped alpha-sialon materials
(Academic Press Inc Elsevier Science, 2002)
…
Transmission electron microscopy of SrO containing multi-cation doped alpha-SiAlON ceramics
(Trans Tech Publications LTD, 2002)
An advantage of alpha-SiAlON is that it can accommodate cations of sintering additives and hence reduces the amount of deleterious remnant intergranular amorphous phase. However, it is believed that relatively large cations ...
Effects of different Si3N4 starting powders and sintering conditions on the grain morphology and mechanical properties of alpha-SiAlON ceramics
(Trans Tech Publications LTD, 2002)
Nitrogen rich yttrium-cerium containing multi-cation alpha -SiAlON starting compositions have been prepared by gas pressure sintering using "conventional" alpha -Si3N4 or alpha-beta Si3N4 containing powder. The effect of ...
Effect of starting composition, type of rare earth sintering additive and amount of liquid phase on ? ? ß sialon transformation
(1997)
Five different ?-ß sialon and ?-sialon compositions have been prepared using different rare earth oxide additives namely, neodymium, samarium, dysprosium and ytterbium. Post-sintering heat treatments have been carried out ...
The effect of heat-treatment on the performance of submicron SiCp-reinforced ?-ß sialon composites: III. Mechanical properties
(Elsevier BV, 1997)
Agglomerate-free SiCp-reinforced Ln-sialon (Ln=Nd and Yb) composites were fabricated by hot-pressing and by pressureless sintering to evaluate the improvement in microstructure and mechanical properties that could be ...
Improvement of elongated ?-SiAlON ceramics by variation of the processing conditions and amounts of additives
(2001)
Two types of Y-?-SiAlON composition, with different amounts of additional liquid phase were densified in a gas pressure sintering furnace using three different sintering cycles. One series of samples was heated up to 1825°C ...
Hard and tough alpha-SiAlON ceramics
(Trans Tech Publications LTD, 2000)
Yb, Nd/Ca and Ce/Ca containing a-sialon starting compositions have been densified by either pressureless sintering or capsul free sinter/HIP'ing using "conventional" alpha-Si3N4 powder. X-ray diffraction studies of both ...
Performance of new ?-ß SiAlONs in turning operations
(2001)
New ?-ß 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 compared ...
The effect of heat-treatment on the performance of sub-micron SiCp-reinforced alpha-beta sialon composites .3. Mechanical properties
(Elsevier Sci LTD, 1997)
Agglomerate-free SiCp-reinforced Ln-sialon (Ln=Nd and Yb) composites were fabricated by hot-pressing and by pressureless sintering to evaluate the improvement in microstructure and mechanical properties that could be ...