Sinter-forging of nanophase TiO2
1992; Pergamon Press; Volume: 26; Issue: 5 Linguagem: Inglês
10.1016/0956-716x(92)90440-p
ISSN1873-2712
AutoresMichael D. Uchic, H.J. Höfler, W.J. Flick, Ran Tao, Peter Kurath, R. S. Averback,
Tópico(s)Aluminum Alloys Composites Properties
ResumoSinter-forging is a shaping and densification technique that has fallen into oblivion today. However, the ignorance of this technique is unjustified. It is shown that sinter-forging can be utilized for preparation of transparent magnesium aluminum spinel (MgAl2O4) ceramics in SPS equipment. While the porosity and grain size of the materials prepared via sinter-forging and conventional SPS with the same process schedule is very similar (0.2–1.1 % and 0.33 ± 0.02 μm, respectively) the in-line transmittance (at a wavelength of 550 nm) is 45 % for the material prepared via sinter-forging, but only 3 % for the material prepared via conventional SPS. The reason for this surprisingly high in-line transmittance at relatively high porosity is evidently the pore size, which is much smaller with sinter-forging than with conventional SPS.
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