To verify these rules, laser sintered
snap-fits with rectangular cross-sections and ring segments were tested.
WC-8Co powders were sintered
at temperatures of 1523-1613 K for 0-10 min under a vacuum of 7 Pa.
In some researches [20, 21], the relative density of Mo-Cu composites is ranging from 92 to 97% (relatively low), even though the compacts are sintered
at a higher temperature with more sintering time than those in this research.
Further sintering at temperature range between 950[degrees]C and 1100[degrees]C, during 2h at each temperature, gave the Raman spectra of the same intensity and identical Raman bands as observed for Ba-TN sintered
at 900[degrees]C (see Figure 2(b-e)).
Table-2: Table showing porosity content in un-sintered and sintered
For studying the microstructural properties, all the sintered
samples were gradually polished with SiC paper and 1 [micro]m diamond paste.
The crystalline phases present in the calcined powder and the sintered
ceramic pellets were investigated using powder X-ray diffraction analysis using Cu K[alpha] radiation in a Bruker D8 Advance diffractometer in the Bragg-Brentano geometry, operating at 40kV/40mA in the continuous scanning mode, over a 2[theta] range from 20[degrees] to 80[degrees].
However, when the preheating temperature exceeds a certain value, too much gas generated by the organic matter may excessively impact the surface of the ceramsite, causing the sintered
body to crack and being difficult to expand.
These characteristics are not favorable for sintering, resulting in low production, low grade, poor strength, low yield, and high solid energy consumption of the sintered
ore [1, 2].
Agarwal, "Graphene-induced strengthening in spark plasma sintered
tantalum carbide-nanotube composite," Scripta Materialia, vol.
Reduction of the secondary operations after the parts are densified and sintered
improves costs and offers an alternate to machined wrought products.
The body includes a sintered
part of a metallic powder fused together layer by layer, and a non-sintered part attached to the sintered
part and in contact therewith in a contact zone, the sintered
part forming the first surface and the non-sintered part forming the second surface.