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particle strengthened platinum alloys

There is a large number of possible applications for platinum allloys at elevated temperatures. The alloys should be easily deformable and hardenable. Binary platinum alloys that can be strengthened reversibly by precipitaion hardening have so far not been found. Therefore, experiments are carried out with ternary alloys whose strength can be modified by heat treatments. It is possible to strengthen the material significantly with small additions of alloying elements. By varying composition and production process, it is attempted to optimze such platinum allyos for specific applications.

shape memory alloys for architecture

The best known and most extensively studied shape memory alloy is Ni-Ti. The shape memory effect is caused by a phase transformation between martensitic and austenitic phase at transformation temperatures not far from room temperature. The transformation temperature is strongly influenced by the composition, but also by the thermo- mechanical treatment. Ni-Ti contains a considerable amount of Ti and is difficult to produce, two factors that render it relatively expensive. An Fe-based shape memory would allow for an application of the material on a large scale, e.g. for earth quake security measures of buildings and other consructions like e.g. bridges. For this purpose, the transformation temperature of Fe-based shape memory alloys needs to be adjusted.

Formgedächtnislegierung für die Architektur

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