3 ms·
See the publications of Frederik Kotz: https://scholar.google.de/citations?user=TQBKvzsAAAAJ&hl=de https://scholar.google.de/citations?user=TQBKvzsAAAAJ&hl=de
by lucioperca 6y ago
See the publications of Frederik Kotz: https://scholar.google.de/citations?user=TQBKvzsAAAAJ&hl=de https://scholar.google.de/citations?user=TQBKvzsAAAAJ&hl=de
Citing from the Nature publication:
"The shrinkage of the part during the sintering process is
isotropic and dependent on the solid loading (hence can be calculated;
see Supplementary Information). The sintering shrinkage for stereo-
lithography and microstereolithography does not depend on the scale
of the sintered parts (for example, the honeywell structure in Fig. 1a
with a solid loading of 37.5 vol% showed the expected linear shrinkage
of 27.88% in height from 3.05 mm to 2.2 mm and width from 2.177 cm
to 1.57 cm)."
"During a final sintering step at 1,300 °C the density of the brown part is increased
(ρ final = 2.2 g cm −3 ) to that of high-quality fused silica glass with no
remaining porosity and no cracks."
But of course these processes could be quite sensitive to hard to control parameters.
- blix 6y agoIf they can reliably get those densities and shrinkages from this procedure that is quite impressive. After a brief look through the papers, there is some promising evidence but I'd like to see a more thorough characterization, especially demonstrating spatial homogeneity of porosity and shrinkage. It's certainly a very interesting technology, and I think it could potentially be applicable to materials beyond glass.
- jlokier 6y ago> I think it could potentially be applicable to materials beyond glass. It's been used for quite a few years already. Precious metal clay is basically this. You can 3d print with it, then fire it and it turns into solid metal.
- blix 6y agoWhat's most interesting to me is subtractive manufacturing of ceramics. From what I've seen in metals, there's a preference for powder bed technologies over binder technologies. But it's not like I have a wide scope of current industry or research.