A shape memory gold alloy processed by rapid solidification

Battezzati, Livio; Fiore, Gianluca; Massazza, M.

doi:10.1016/j.jallcom.2006.08.139

Cited by 19 publications

(23 citation statements)

References 16 publications

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“…The critical transition temperature for A2 / B2 ordering (T C1 ) is proved to be around 908 K [6,7]. However, the B2 / L2 1 transition temperature (T C2 ) is unclear yet.…”

Section: Introductionmentioning

confidence: 99%

A2 → B2 → L21 ordering transitions in Au–Cu–Al alloys

Jin

2009

Intermetallics

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“…The critical transition temperature for A2 / B2 ordering (T C1 ) is proved to be around 908 K [6,7]. However, the B2 / L2 1 transition temperature (T C2 ) is unclear yet.…”

Section: Introductionmentioning

confidence: 99%

A2 → B2 → L21 ordering transitions in Au–Cu–Al alloys

Jin

2009

Intermetallics

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“…At 750˚C Spangold (Au 7 Cu 5 Al 3 ) is partially molten. Battezatti found the solidus at 726˚C and liquidus at 767˚C [28] while Levey et al determined these to be in the vicinity of 736 and 775˚C respectively. The application of in situ X ray diffraction using synchrotron radiation provided further insight into the melting phenomena.…”

Section: β-Phasementioning

confidence: 99%

Ternary β and γ phases in the Al–Au–Cu system at 750°C

Bhatia

Kealley

Wuhrer

et al. 2009

Journal of Alloys and Compounds

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There are many aspects of the phases and phase boundaries of the Al-Au-Cu ternary system that are still unknown. Although a 500˚C isothermal section and an 18 karat pseudobinary have been reported, many of the other constitutive relationships within the ternary are uncertain. Another unresolved issue is the range of compositions that can possibly serve as shape memory alloys. Here we investigate the constitutive relationships in this system at 750˚C. We confirm that the γ and β phases extend deep into the ternary but that the other known compounds are largely confined to the binary edges. The suitability of β-phase compositions of lower Au content for shape memory service is established.Keywords: (A) metals and alloys, (C) shape memory, (C) phase diagrams, (D) scanning electron microscopy, SEM

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“…Au 7 Cu 5 Al 4 (sometimes called 'Spangold' [1]) is a less well-known example of a SMA. It has been shown to be relatively resistant to aging compared to its copper-based counterparts and has been previously studied in its bulk form [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Thin Films of AuCuAl Shape Memory Alloy for Use in Plasmonic Nano-actuators

et al. 2011

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We describe the fabrication and structure of nanoscale thin films of β phase shape memory alloys with the nominal atomic stoichiometry Au 7 Cu 5 Al 4 (corresponding to 5.8 wt% Al). These alloys possess properties that suggest they could be used in nanoscale actuators. The films described here are between 20 and 50 nm thick which is below the thickness at which some other shape memory alloys cease to transform. However, microstructural and X-ray studies confirm that the coatings still exhibit the displacive transformations that are a prerequisite for the shape memory effect.

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A shape memory gold alloy processed by rapid solidification

Cited by 19 publications

References 16 publications

A2 → B2 → L21 ordering transitions in Au–Cu–Al alloys

A2 → B2 → L21 ordering transitions in Au–Cu–Al alloys

Ternary β and γ phases in the Al–Au–Cu system at 750°C

Thin Films of AuCuAl Shape Memory Alloy for Use in Plasmonic Nano-actuators

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