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dc.contributor.authorGabbitas, Brian
dc.contributor.authorCao, Peng
dc.contributor.authorRaynova, Stiliana (Stella) Rousseva
dc.contributor.authorZhang, Deliang
dc.identifier.citationGabbitas, B., Cao, P., Raynova, S. & Zhang, D. (2011). Microstructural evolution during mechanical milling of Ti/Al powder mixture and production of intermetallic TiAl cathode target. Journal of Material Science, published online on 07 September 2011.en_NZ
dc.description.abstractTitanium aluminides are of great technological interest because of their attractive mechanical properties. Mechanical milling/alloying is a promising powder metallurgical technique, which can achieve ultrafine, uniform and manipulable microstructures. In this study, we employed a recently revisited discus mill to produce a composite Ti– (50–57) at.%Al powder feedstock, which is suitable for hot consolidation to produce bulk cathode targets for physical vapour deposition (PVD) coatings. The effects of milling time, quantity of process control agent (PCA) and discus-topowder weight ratio (DPR) on the microstructure evolution of the attendant Ti/Al composite powder were investigated in detail. It was found that to produce Ti/Al composite powders with a fine particle size and a uniform microstructure, the practicable processing parameters should be 2 or 3% isopropanol addition as PCA, 12 h of milling time and at least 13:1 DPR weight ratio. Cathode targets were produced by hot isostatic pressing (HIPing) the as-milled powders. The targets were then used to produce a PVD TiAlN coating which had an average microhardness of 2400 HV.en_NZ
dc.subjecttitanium aluminidesen_NZ
dc.subjectmechanical milling/alloyingen_NZ
dc.titleMicrostructural evolution during mechanical milling of Ti/Al powder mixture and production of intermetallic TiAl cathode targeten_NZ
dc.typeJournal Articleen_NZ
dc.relation.isPartOfJournal of Materials Scienceen_NZ

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