Mechanically alloyed and spark plasma sintered aluminium/precious metal oxide composite materials Kubota, Masahiro and Cizek, Pavel 2010, Mechanically alloyed and spark plasma sintered aluminium/precious metal oxide composite materials, Materials science forum, vol. 638-642, pp. 1824-1829, doi: 10.4028/www.scientific.net/MSF.638-642.1824. Attached Files Name Description MIMEType Size Downloads Title Mechanically alloyed and spark plasma sintered aluminium/precious metal oxide composite materials Author(s) Kubota, Masahiro Cizek, Pavel orcid.org/0000-0003-0707-5737 Journal name Materials science forum Volume number 638-642 Start page 1824 End page 1829 Total pages 7 Publisher Trans Tech Publications Place of publication Stafa-Zurich, Switzerland Publication date 2010 ISSN 0255-5476 Keyword(s) aluminium mechanical alloying spark plasma sintering solid state reaction precious metal oxide AgO PtO2 PdO mechano-chemical reaction Summary Air-atomised pure aluminium powder with additions of 10 at.% of AgO, PtO2 or PdO was mechanically alloyed (MAed) by using a vibrational ball mill, and MAed powders were consolidated into bulk materials by a spark plasma sintering (SPS) process. Mechano-chemical reactions among pure Al, precious metal oxide and stearic acid, added as a process control agent, during the mechanical alloying (MA) process and subsequent heat treatments were investigated by X-ray diffraction. The mechanical properties of MAed powders obtained under various heat treatment conditions and those of the SPS materials were evaluated by hardness tests. Mechano-chemical reactions occurred in Al/precious metal oxide composite powders during 36 ks of the MA process to form AlAg2, Pt and Al3Pd2 for the Al-AgO, Al-PtO2 and Al-PdO systems, respectively. Further solid-state reactions in MAed powders have been observed after heating at 373 K to 873 K for 7.2 ks. The hardness of MAed powders initially increased significantly after heating at 373 K and then generally decreased with increasing heating temperatures. The full density was obtained for the SPS materials under the conditions of an applied pressure of 49 MPa at 873 K for 3.6 ks. All the SPS materials exhibited hardness values of over 200 HV in the as-fabricated state. Language eng DOI 10.4028/www.scientific.net/MSF.638-642.1824 Field of Research 091202 Composite and Hybrid Materials Socio Economic Objective 861299 Fabricated Metal Products not elsewhere classified HERDC Research category C1 Refereed article in a scholarly journal HERDC collection year 2010 Copyright notice ©2010, Trans Tech Publications Persistent URL http://hdl.handle.net/10536/DRO/DU:30035318 Document type: Journal Article Collections: Centre for Material and Fibre Innovation GTP Research Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Thu, 02 Jun 2011, 10:58:51 EST Thu, 02 Jun 2011, 11:02:34 EST Tue, 07 Jun 2011, 15:00:06 EST Tue, 07 Jun 2011, 15:01:19 EST Tue, 07 Jun 2011, 15:02:04 EST Tue, 07 Jun 2011, 15:03:36 EST Tue, 03 Feb 2015, 12:48:07 EST Filtered Full Citation counts:   Cited 0 times in TR Web of Science Cited 0 times in Scopus Search Google Scholar Access Statistics: 725 Abstract Views, 3 File Downloads  -  Detailed Statistics Created: Thu, 02 Jun 2011, 10:58:37 EST by Nadine Langeder