Nanocrystallization and Dissolution of Immiscible Powder Alloys Using High Pressure Torsion

Autor(en)

Susi Kahofer, Michael Zehetbauer, Herbert Danninger, Erhard Schafler, Michael Kerber, Jelena Horky

Abstrakt

Precompacts out of immiscible systems CuCr (75/25 wt%) and WCu (80/20 wt%), respectively, were made by pressing mixed powders and sintering. By applying different strains and hydrostatic pressures of HPT at room temperature, disc-shaped samples with a diameter of 8 mm were produced. They were investigated by Light Microscopy, Scanning-Electron Microscopy using Back-Scattered Electrons, and X-ray Line Profile Analysis. In addition, Vickers microhardness data were collected. Both systems showed the highest microhardness at a shear strain of about gamma = 170. The density (for the case of Cu25Cr) of the consolidated material could be increased to the theoretical value. Microhardness and grain sizes were studied individually for each of the phases, too.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Technische Universität Wien, Universität Wien

Journal

Materials Science Forum

Band

667-669

Seiten

151-156

Anzahl der Seiten

6

ISSN

0255-5476

DOI

https://doi.org/10.4028/www.scientific.net/MSF.667-669.151

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie, 210006 Nanotechnologie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/d6106510-a802-4ecf-87c6-30ae1aaa6dc1