You are not logged in.

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/

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
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
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/
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

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
Connect to link resolver
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in TR Web of Science
Scopus Citation Count Cited 0 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 409 Abstract Views, 3 File Downloads  -  Detailed Statistics
Created: Thu, 02 Jun 2011, 10:58:37 EST by Nadine Langeder

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact