5 research outputs found
The Al-Rich Part of the Fe-Al Phase Diagram
The Al-rich part of the Fe-Al phase diagram between 50 and 80 at.% Al including the complex intermetallic phases FeAl (ε), FeAl, FeAl, and Fe4Al was re-investigated in detail. A series of 19 alloys was produced and heat-treated at temperatures in the range from 600 to 1100 °C for up to 5000 h. The obtained data were further complemented by results from a number of diffusion couples, which helped to determine the homogeneity ranges of the phases FeAl, FeAl, and FeAl. All microstructures were inspected by scanning electron microscopy (SEM), and chemical compositions of the equilibrium phases as well as of the alloys were obtained by electron probe microanalysis (EPMA). Crystal structures and the variation of the lattice parameters were studied by x-ray diffraction (XRD) and differential thermal analysis (DTA) was applied to measure all types of transition temperatures. From these results, a revised version of the Al-rich part of the phase diagram was constructed
Empirische Forschung in der Deutschdidaktik. Band 2: Erhebungs- und Auswertungsverfahren
Was ist das richtige empirische Verfahren fĂĽr mein Forschungsprojekt? Der vorliegende Band liefert eine einsteigerfrendliche, umfassende EinfĂĽhrung in die Erhebung und Auswertung empirischer Daten im Rahmen deutschdidaktischer Forschung.
Hierbei werden in 21 thematischen Kapiteln verschiedene Erhebungs- und Auswertungsverfahren vorgestellt und anschlieĂźend ein Einblick in die praktische Arbeit mit diesem Verfahren anhand eines aktuellen Forschungsprojekts geboten.
Ein Grundlagenwerk fĂĽr Studierende und Promovierende