Papers by Keyword: PSZ

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Authors: M. Schacht, N. Boukis, E. Dinjus, K. Ebert, Rolf Janßen, F. Meschke, N. Claussen
Authors: C. Verdy, G. Wolff, Christian Coddet, D. Cornu, J.M. DeMonicault
Authors: Marcelo José Bondioli, Juliana K.M.Faria Daguano, A.A. Palmeira, Claudinei dos Santos, Kurt Strecker
Abstract: Zirconia is a bioceramic material widely used for dental implants. In this work, the sinterability of nano-crystalline powders has been investigated by dilatometry in the temperature range of 1250 to 1400 0C with isothermal holding times of up to 8h. A slight increase in grain growth and an increasing linear shrinkage have been observed with increasing sintering temperatures. The sintered samples were submitted to Vickers' hardness and KIC tests and the results compared regarding the sintering conditions. It has been verified that satisfactory hardness and fractures toughness have been achieved after sintering above 1300 0C during 8h.
Authors: Li Da Shen, Zong Jun Tian, Y.H. Huang, Guo Ran Hua
Abstract: Reconstituted nanostructured partially stabilized zirconia (PSZ) feedstock powders were laser sintered under a range of laser processing parameters. Scanning electron microscopy (SEM) was applied to analyze the microstructure of the powders and sintered bulk. Microhardness of the samples was also tested by Vickers Microhardness tester. These results demonstrated that the microstructure of the samples exhibits a bimodal distribution which comprises molten and non-molten feedstock particles. It was found that feedstock maintained some of its nanostructure during laser sintering with relatively low laser power; whereas feedstock lost most of its initial characters with high laser power. It was also observed that Microhardness values have respect to the proportion of non-molten feedstock in those samples.
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