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Showing 1 to 6 of 6 for “"Strukturelle Phasenumwandlung"”.
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Mechanical stresses upon phase transitions
Mechanical stress studies were carried out on three different groups of functional coatings using a purpose-built system. Functional coatings have become increasingly important in recent years due to their interesting technological applications. In this work three different groups of coatings were …
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Strukturelle Phasenübergänge in TlH 2 PO 4 und Kristallstrukturen von Rb 0.7 Tl 0.3 H 2 PO 4 und Rb 0.5 Tl 0.5 H 2 PO 4
For the investigation of crystal structures and the phase transitions of TlH2PO4 (TDP), single crystals have been synthesized. By the slow evaporation of the solution, large single crystals of Rb0.5Tl0.5H2PO4, which are proper to the neutron investigations and small single crystals of …
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Application of p electron theory to predict new materials for rewritable optical recording
Phase change recording is based upon the reversible phase transformation of a chalcogenide Te alloy between the crystalline and amorphous states using a focused laser. The formation of the micron-sized bit of information is distinguished from the difference in the optical properties of the two …
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Strukturelle und kinetische Aspekte der kombinatorischen Materialsynthese am Beispiel der Phasenwechselmedien
Nowadays different competing techniques for reversible storage of huge amounts of data are used. One approach that has found extensive application is phase change recording, whereby data are encoded by using amorphous or crystalline states. Consequently the reading, writing and erasure of …
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Zeitabhängige Phänomene in athermischen Formgedächtnislegierungen
Three different material systems (Ni63Al37, Au50.5Cd49.5 and Au52.5Cd47.5), each exhibiting a weakly first order martensitic phase transition with shape memory effect, have been studied. These alloys are model alloys for the observation of precursor effects and therefore are particularly suited for …
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Avalanche dynamics of structural phase transitions in shape memory alloys by acoustic emission spectroscopy
In this work the avalanche dynamics of five shape memory samples has been analyzed by acoustic emission spectroscopy. The acoustic emission spectroscopy is particularly suitable for this analysis as it couples with high sensitivity to small structural changes caused by nucleation processes, …