caa a22 4500 463224949 CHVBK 20180405153224.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0642-2 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0642-2 The influence of magnetron sputtered silver and titanium coatings on the compaction and properties of surface modified PM Ti-48Al powders [Elektronische Daten] [Filipe Neves, Nelson Duarte, Bruno Trindade] Thin layers of silver and titanium were deposited onto commercial Ti-48Al particles by magnetron sputtering prior to their consolidation by hot isostatic pressing and subsequent heat treatment. Based on picnometry and electron probe microanalysis results, average values of 1.5 and 2.5 at.%, respectively, were obtained for the silver and titanium contents in the coated particles. The surface modified Ti-48Al particles exhibited improved sintering ability than the unmodified ones. The consolidated samples have duplex microstructures formed by γ-TiAl and γ-TiAl+α2-Ti3Al grains. Ag-rich nanoprecipitates were detected in the microstructure of the compacted Ti-48Al+Ag sample. The coatings are no longer visible at the grains boundaries after a subsequent homogenization heat treatment at 1200°C. The highest values of hardness and Young's modulus were obtained for the Ti-48Al+Ag sample, associated with a higher density and a lower percentage of pores. Springer Science+Business Media, LLC, 2007 Neves Filipe INETI, DMTP, Estrada do Paço do Lumiar no 22, 1649-038, Lisboa, Portugal aut Duarte Nelson Mechanical Department - Polo II of the Coimbra University, University of Coimbra, Pinhal de Marrocos, 3030-788, Coimbra, Portugal aut Trindade Bruno Mechanical Department - Polo II of the Coimbra University, University of Coimbra, Pinhal de Marrocos, 3030-788, Coimbra, Portugal aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4197-4204 0022-2461 42:12<4197 2007 42 10853 https://doi.org/10.1007/s10853-006-0642-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0642-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Neves Filipe INETI, DMTP, Estrada do Paço do Lumiar no 22, 1649-038, Lisboa, Portugal aut NATIONALLICENCE 700 1- Duarte Nelson Mechanical Department - Polo II of the Coimbra University, University of Coimbra, Pinhal de Marrocos, 3030-788, Coimbra, Portugal aut NATIONALLICENCE 700 1- Trindade Bruno Mechanical Department - Polo II of the Coimbra University, University of Coimbra, Pinhal de Marrocos, 3030-788, Coimbra, Portugal aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4197-4204 0022-2461 42:12<4197 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer