Nozzles from Alumina Ceramics with Submicron Structure Fabricated by Radial Pulsed Compaction
By means of magnetic pulsed compaction and sintering of weakly aggregated alumina based nanopowders the jet forming nozzle samples for hydroabrasive cutting were fabricated. The ceramics were obtained from pure alumina, as well as from alumina, doped by TiO2, MgO and AlMg. The ceramic properties of the channel surface and the nozzle volume were investigated. It was shown that the samples sintered from AlMg doped Al2O3 powder had the best desired mechanical properties and structural characteristics: relative density ~0.97, channel microhardness – 18-20 GPa, channel surface roughness ~0.7 /m, average crystallite size ~1 /m.
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
A. Kaygorodov et al., "Nozzles from Alumina Ceramics with Submicron Structure Fabricated by Radial Pulsed Compaction", Materials Science Forum, Vols. 534-536, pp. 1053-1056, 2007