1. Nozzles from Alumina Ceramics with Submicron Structure Fabricated by Radial Pulsed Compaction
- Author
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A. S. Kaygorodov, V. R. Khrustov, A. V. Spirin, Victor Ivanov, Wheung Whoe Kim, Chang Kyu Rhee, and S. N. Paranin
- Subjects
Materials science ,Mechanical Engineering ,Nozzle ,Sintering ,Condensed Matter Physics ,Indentation hardness ,Mechanics of Materials ,visual_art ,Vickers hardness test ,Surface roughness ,visual_art.visual_art_medium ,Relative density ,General Materials Science ,Ceramic ,Crystallite ,Composite material - Abstract
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.
- Published
- 2007
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