Positron-annihilation studies of free-volume changes in the bulk metallic glassZr65Al7.5Ni10Cu17.5during structural relaxation and at the glass transition

Autor: C. Nagel, Franz Faupel, Klaus Rätzke, E. Schmidtke, W. Ulfert

Publikováno v: Physical Review B. 60:9212-9215

Volume changes in ${\mathrm{Zr}}_{65}{\mathrm{Al}}_{7.5}{\mathrm{Ni}}_{10}{\mathrm{Cu}}_{17.5}$ bulk metallic glass have been observed by positron annihilation and density measurements. Excess volume of the order of 0.1% is quenched in the bulk glass

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8d476ddc9c95d9f6051b3dcb0601b5a0
https://doi.org/10.1103/physrevb.60.9212

Reorientation of diatomic HY complexes in dilute PdY alloys

Autor: W. Ulfert, Helmut Kronmüller, G. Hauptmann, Michael Ege

Publikováno v: Journal of Alloys and Compounds. :222-225

The reorientation of diatomic HY complexes in hydrogen-doped dilute Pd 100− x Y x alloys ( x = 1, 2, 4.5, 8) has been studied by means of internal friction (IF) in an inverted torsion pendulum and in a vibrating reed apparatus. As reported earli

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9e10e2d38b5f02831bb2977d51aee8ae
https://doi.org/10.1016/0925-8388(94)90487-1

Bordoni Relaxation and Hydrogen in Deformed Pd Single Crystals

Autor: G. Hauptmann, Helmut Kronmüller, W. Ulfert

Publikováno v: Materials Science Forum. :171-176

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b9b865600f4923a8acc8c80717b5e503
https://doi.org/10.4028/www.scientific.net/msf.119-121.171

Recent Progress in the Theory of Bordoni-Type Relaxation Processes

Autor: Alfred Seeger, W. Ulfert

Publikováno v: Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 1996, 06 (C8), pp.C8-207-C8-210. ⟨10.1051/jp4:1996843⟩

While it is well established by experiment that the relaxation processes in face-centred cubic metals discovered by P. G. Bordoni as well as related phenomena are due to the thermally activated formation of kink pairs on dislocation lines, the quanti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63f771c8977d6982972498a92fb3be3f
https://hal.archives-ouvertes.fr/jpa-00254651/document

Dislocation Relaxation Processes due to Kink Migration

Autor: W. Ulfert, Élida B. Hermida, A. Seeger

Publikováno v: Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 1996, 06 (C8), pp.C8-175-C8-178. ⟨10.1051/jp4:1996835⟩
Scopus-Elsevier

The interpretation of the Bordoni relaxation and of related relaxation phenomena in terms of the thermally activated, stress-assisted formation of kink pairs on dislocation lines is well established on assuming that the migration of kinks along dislo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fba44b2e4cfcce626aed916c0efb9c1
https://hal.archives-ouvertes.fr/jpa-00254643