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

Bhatia, Vijay K.; Thorogood, Gordon J.; Dowd, Annette; Cortie, Michael B.

doi:10.1557/opl.2011.180

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…These SMAs are promising for jewellery and biomedical applications, due to their inherent properties, such as biocompatibility, aesthetic value and chemical inertness. However, most investigations were performed on bulk alloys so far [1][2][3][4][5][6][7][8][9] and very few studies have been devoted to thin films [10,11].…”

Section: Introductionmentioning

confidence: 99%

Composition–Structure–Property Relations in Au35–68Cu49–15Al16–17 Shape Memory Thin Films

Buenconsejo

Pfetzing‐Micklich

Paulus

et al. 2016

Shap. Mem. Superelasticity

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The phase transformation behaviour, structure and mechanical properties of Au 35-68 Cu 49-15 Al 16-17 thin film shape memory alloys (SMA) have been investigated, with emphasis on the effects of Au content. The results revealed the underlying composition-structure-property relations. The thermal transformation hysteresis (DT) is wide (*55 K) for thin films with Au \50 at.%, while it is narrow (*15 K) for thin films with Au [50 at.%. This behaviour is correlated with the change in lattice constant of b-(Au-Cu-Al) (a b), suggesting a structural origin on the DT behaviour. The mechanical properties, such as hardness and elastic modulus, varied in the range of 2-4 and 70-120 GPa, respectively. The optimum Au composition range for tuning the functional property is between 43 and 55 at.% Au, where the least amount of non-transforming phases form and DT can be tailored between 55 K (43 at.% Au) and 17 K (55 at.% Au). This is important for the development and practical application of Au-Cu-Al based thin film SMA.

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Section: Introductionmentioning

confidence: 99%

Composition–Structure–Property Relations in Au35–68Cu49–15Al16–17 Shape Memory Thin Films

Buenconsejo

Pfetzing‐Micklich

Paulus

et al. 2016

Shap. Mem. Superelasticity

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New Au–Cu–Al thin film shape memory alloys with tunable functional properties and high thermal stability

Buenconsejo

Ludwig

2015

Acta Materialia

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Effect of Al and Cu Contents on Mechanical Properties of Au-Cu-Al Shape Memory Alloys

Hosoda

Hori

Morita

et al. 2015

J. Japan Inst. Metals and Materials

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In order to develop high performance biomedical shape memory alloy having both good biocompatibility and high X ray radiography resolution, effects of Al and Cu contents on the martensitic transformation, microstructure and mechanical properties of AuCuAl ternary alloys were studied. Differential scanning calorimetry revealed that the martensitic transformation start temperature decreased with a rate of -7 K/molAl in the Au 30 molCu Al alloys. Besides, the M s increased with a rate of 18 ～53 K/molCu in the Au Cu 15～20 molAl alloys in the Cu poor side of stoichiometry, while the M s was almost constant in Cu rich side. By taking into account of the estimated defect structures, the number of Au Al atomic bonds is important for the stabilization of the parent b phase. Corresponding microstructural change due to the martensitic transformation was confirmed by optical microscopy. Vickers hardness of the Au 30 molCu Al alloys decreased with increasing Al content, and a minimum was reached at 20～25 molAl and then the Vickers hardness increased at 25 molAl. The alloys at a limited composition range around Au 30～31 molCu 14～15 molAl possessed both high strength and ductility in addition to pseudoelasticity, while the other alloys exhibited poor ductility.

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

Cited by 3 publications

References 20 publications

Composition–Structure–Property Relations in Au35–68Cu49–15Al16–17 Shape Memory Thin Films

Composition–Structure–Property Relations in Au35–68Cu49–15Al16–17 Shape Memory Thin Films

New Au–Cu–Al thin film shape memory alloys with tunable functional properties and high thermal stability

Effect of Al and Cu Contents on Mechanical Properties of Au-Cu-Al Shape Memory Alloys

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