Phase Analyses of a TtPt Alloy Synthesized by Spark Plasma Sintering

Hilda Kundai Chikwanda; Yoko Yamabe-Mitarai; Silethelwe Chikosha

doi:10.4028/www.scientific.net/MSF.675-677.1143

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HomeMaterials Science ForumMaterials Science Forum Vols. 675-677Phase Analyses of a TtPt Alloy Synthesized by...

Phase Analyses of a TtPt Alloy Synthesized by Spark Plasma Sintering

Abstract:

A Ti-50at%Pt alloy synthesized using the spark plasma sintering (SPS) technique has been characterized for phases’ identification. TiPt alloys have potential use as high temperature shape memory alloys(HTSMAs). Test specimens were prepared at SPS temperature of 1300°C. Sintering pressure and time were varied. The microstructural features of the specimens were investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electron microscope used was equipped with an EDS detector, that, together with the XRD, were used for both the identification and analyses of the phases in the starting materials and the sintered alloys. High temperature XRD (800 -1300°C) as well as ambient temperature XRD analyses were done on the starting mechanically alloyed powders. All the samples tested at elevated temperatures were subsequently tested at room temperature after cooling. XRD analyses of the sintered samples were all done at room temperature. Analyses of the XRD results revealed new distinct phases from a temperature of 1000°C. A comparison of the room temperature XRD results for alloy powders and that of the sintered alloys was made. The following phases have been identified and studied TiPt B2, TiPt B19, Pt3Ti, Ti3Pt and Pt5Ti3. SPS pressure and sintering time did not show much effect on the phases detected. The alloy composition was found to be very inhomogeneous.

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Periodical:

Materials Science Forum (Volumes 675-677)

Pages:

1143-1146

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.675-677.1143

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Online since:

February 2011

Authors:

Hilda Kundai Chikwanda, Yoko Yamabe-Mitarai, Silethelwe Chikosha

Keywords:

B19, B2, High-Temperature Shape Memory Alloy, Phase, Powder Metallurgy (PM), Scanning Electron Microscope (SEM), Spark Plasma Sintering (SPS), TiPt, X-Ray Diffraction (XRD)

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References

[1] G M Rotaru et al, Acta mater. 55 (2007) 4447-4454.

Google Scholar

[2] O Rios et al, SPIE conf proce. Smart Structures and materials (2005) (behaviour and mechanics) san diego CA, 1-12.

Google Scholar

[3] T Biggs et al, Platinum Metals review (2003), 47, (4) 142-156.

Google Scholar

[4] Yoko Yamabe-Mitarai, (2006) Materials Transactions, 47, 3, 650-657.

Google Scholar

[5] M Nishida et al. material Science and Technology, 24 (2008) 8, 884-889.

Google Scholar

[6] Guillermo Bozzolo et al. (2007) Phase structure and site preference behavior of ternary alloying additions to PdTi and PtTi shape-memory alloys, Intermetallics; 15901-911.

DOI: 10.1016/j.intermet.2006.10.049

Google Scholar

[7] H C Donkersloot and J H N van Vutch, J-less common metals 20 (1970), 83-91.

Google Scholar

[8] D S Grummon, Smart Structural Materials, JOM, December, (2003) 24-32.

Google Scholar

[9] T Biggs et al, Journal of alloys and compounds 375, (2004) 120-127.

Google Scholar