Characterisation of TiPt HTSM Alloy Powder Produced by Mechanical Alloying

TiPt has been identified for use as a high temperature shape memory (HTSM) alloy  that operates at temperatures above 1000^oC.  Currently this alloy is being produced by melting as the alloying technique which has disadvantages of being energy intensive and yet producing a non homogeneous product.  Powder processing has been identified as an alternative to making the TiPt alloy.  In this study mechanical milling was carried as a way of alloying the powder.  The milled powder was characterised by XRD, SEM and TEM to determine if alloying occurred.  The results showed that TiPt formed together with other phases such as Ti, Pt solid solutions and Ti₅Pt₃ during milling.