The effect of nickel on the martensitic-type transformations of Pt3Al and PtTi

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Show simple item record Biggs, T Cornish, LA Witcomb, MJ Cortie, MB 2010-05-28T09:49:31Z 2001-01
dc.identifier.citation Journal de Physique IV France, 2001, 11 (Pr8), pp. 493 - 498
dc.identifier.issn 1155-4339
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract The effect of nickel on two classes of martensitic-type transformations in platinum systems has been studied. The first transformation is Ll[2] to DO[c]' in the Pt3Al system and the second is B2 to B 19 in the TiPt system. The microstructures after transformation in the two systems are very different. The product of the Pt[3]Al transformation has a twinned microstructure, typical of cubic-to-tetragonal transformations. The product of the TiPt transformation is lath-like, although the morphology can be altered using heat treatments. The parent phase in the TiPt system is not retained at room temperature, whereas the parent phase in the Pt[3]Al transformation can be stabilised to room temperature. A great variation in hardness and transformation temperature is seen in each system as the composition is varied about the stoichiometric ratio, which has the lowest hardness. The Pt[3]Al transformation temperature has been reported to range from around room temperature to 1000°C. The TiPt transformation temperature can range from 1000 to 1080°C. The effect of nickel additions on these alloys also has a marked effect on the parent and product phase stability, and hence the microstructure and resulting hardness. The effect on the Pt[3]Al phase is complex, as nickel appears to stabilise the parent phase. The hardness varied in the region of 350 to 500 HV[10]. For the TiPt phase, the hardness values were generally found to increase with the nickel additions increasing from 250 to about 600 HV[10]. The addition of 20 at.% nickel decreases the transformation temperature from around 1000°C to about 600°C.
dc.format Y
dc.publisher EDP Sciences
dc.relation.isbasedon 10.1051/jp4:2001882
dc.title The effect of nickel on the martensitic-type transformations of Pt3Al and PtTi
dc.type Journal Article
dc.parent Journal de Physique IV France
dc.journal.volume Pr8
dc.journal.volume 11
dc.journal.number Pr8 en_US
dc.publocation France en_US
dc.identifier.startpage 493 en_US
dc.identifier.endpage 498 en_US SCI.Physics and Advanced Materials en_US
dc.conference Verified OK en_US
dc.for 0204 Condensed Matter Physics
dc.for 0912 Materials Engineering
dc.for 1007 Nanotechnology
dc.personcode 020302
dc.percentage 40 en_US Nanotechnology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Transition element alloys
dc.description.keywords Experimental study
dc.description.keywords Binary alloys
dc.description.keywords Titanium alloys
dc.description.keywords Aluminium alloys
dc.description.keywords Platinum alloys
dc.description.keywords Scanning electron microscopy
dc.description.keywords Optical microscopy
dc.description.keywords Phase diagrams
dc.description.keywords Temperature dependence
dc.description.keywords Hardness
dc.description.keywords Heat treatments
dc.description.keywords Twinning
dc.description.keywords Microstructure
dc.description.keywords Martensitic transformations
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc false
utslib.collection.history Closed (ID: 3)

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