Wolfgang Sprengel

Assoc.Prof. Dipl.-Phys. Dr.rer.nat.

20062020
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Research Output 2006 2019

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Article
2019
Open Access
Kinetics
Chemical analysis
Reaction rates
Precipitates
Heat treatment

Recent progress in dilatometry for quantitative analysis of precipitation kinetics

Würschum, R., Enzinger, R. J., Hengge, E. & Sprengel, W., 2019, (Accepted/In press) In : IOP Conference Series / Materials Science and Engineering. 580, 012502.

Research output: Contribution to journalArticleResearchpeer-review

Precipitates
Dilatometers
Kinetics
Chemical analysis
Kinetic parameters
2018

Kinetics of vacancy annealing upon time-linear heating applied to dilatometry

Enzinger, R., Neubauer, C., Kotzurek, J., Sprengel, W. & Würschum, R., 2018, In : Journal of Materials Science. 53, p. 2758-2765

Research output: Contribution to journalArticleResearchpeer-review

Open Access
Vacancies
Annealing
Heating
Kinetics
Grain boundaries

Lifetime of Positrons in Nanostructured Nonstoichiometric Silver Sulfide Ag2-δS

Rempel, A., Sadovnikov, S., Klinser, G. & Sprengel, W., 2018, In : JETP letters. 107, 1, p. 1-9

Research output: Contribution to journalArticleResearchpeer-review

2017

A method for improved 4D-computed tomography data acquisition

Kupper, M., Sprengel, W., Winkler, P. & Zurl, B., 2017, In : Zeitschrift für medizinische Physik. 27, 1, p. 31-38

Research output: Contribution to journalArticleResearchpeer-review

Defects and Charging Processes in Li-Ion Battery Cathodes Studied by Operando Magnetometry and Positron Anihilation

Würschum, R., Topolovec, S., Klinser, G., Sprengel, W., Kren, H., Koller, S., Krenn, H., Hugenschmidt, C., Reiner, M., Gigl, T., Berkermeier, F. & Fiedler, M., 2017, In : Materials Science Forum. 879, p. 2125-2130

Research output: Contribution to journalArticleResearchpeer-review

Improvement of the TLD dose calculation by application of an individual residual dose correction

Wilding, G., Stadtmann, H. & Sprengel, W., 4 Apr 2017, In : Radiation Measurements. 106, p. 273-277

Research output: Contribution to journalArticleResearchpeer-review

Internal stress and defect-related free volume in submicrocrystalline Ni studied by neutron diffraction and difference dilatometry

Kotzurek, J., Hofmann, M., Simic, S., Pölt, P., Hohenwarter, A., Pippan, R., Sprengel, W. & Würschum, R., 2017, In : Philosophical magazine (London) / Letters. 97, 11, p. 450-458

Research output: Contribution to journalArticleResearchpeer-review

Open Access
dilatometry
residual stress
neutron diffraction
extensometers
cold rolling

Structural anisotropy in equal-channel angular extruded nickel revealed by dilatometric study of excess volume

Kotzurek, J., Sprengel, W., Krystian, M., Simic, S., Pölt, P., Hohenwarter, A., Pippan, R. & Würschum, R., 2017, In : International journal of materials research = Zeitschrift für Metallkunde. 108, p. 81-88

Research output: Contribution to journalArticleResearchpeer-review

2016

A high-stability non-contact dilatometer for low-amplitude temperature-modulated measurements

Luckabauer, M., Sprengel, W. & Würschum, R., 2016, In : Review of scientific instruments. 87, p. 075116

Research output: Contribution to journalArticleResearchpeer-review

Combined volumetric energetic and microstructural defect analysis of ECAP-processed nickel

Reglitz, G., Oberdorfer, B., Fleischmann, N., Kotzurek, J., Divinski, S., Sprengel, W., Wilde, G. & Würschum, R., 2016, In : Acta materialia. 103, p. 396-406

Research output: Contribution to journalArticleResearchpeer-review

Direct measurement of vacancy relaxation by dilatometry

Kotzurek, J., Steyskal, E-M., Oberdorfer, B., Hohenwarter, A., Pippan, R., Sprengel, W. & Würschum, R., 2016, In : Applied Physics Letters. 109, p. 021906 4 p.

Research output: Contribution to journalArticleResearchpeer-review

2014

Grain boundary excess volume and defect annealing of copper after high-pressure torsion

Oberdorfer, B., Setman, D., Steyskal, E-M., Hohenwarter, A., Sprengel, W., Zehetbauer, M., Pippan, R. & Würschum, R., 2014, In : Acta materialia. 68, p. 189-195

Research output: Contribution to journalArticleResearchpeer-review

Specific volume study of a bulk metallic glass far below its calorimetrically determined glass transition temperature

Luckabauer, M., Kühn, U., Eckert, J. & Sprengel, W., 2014, In : Physical Review / B. 89, p. 174113-1-174113-6

Research output: Contribution to journalArticleResearchpeer-review

The Decisive Contributions by L. Boltzmann and C. Matano to the Quantitative Analysis of Diffusion Phenomena

Sprengel, W. & Koiwa, M., 2014, In : Diffusion Foundations. 1, p. 49 57 p.

Research output: Contribution to journalArticleResearchpeer-review

2013

Comprehensive defect characterization of different iron samples after severe plastic deformation

Puff, W., Zhou, X., Oberdorfer, B., Scherwitzl, B. R., Parz, P., Sprengel, W. & Würschum, R., 2013, In : Journal of Physics / Conference Series. 443, 1, p. 012033-012033

Research output: Contribution to journalArticleResearchpeer-review

Reaction diffusion and interdiffusion in some binary metallic systems

Mehrer, H. & Sprengel, W., 2013, In : Philosophical magazine (London) / Letters. 93, 16, p. 1971-1986

Research output: Contribution to journalArticleResearch

Self- and Solute Diffusion, Interdiffusion and Thermal Vacancies in the System Iron-Aluminium

Mehrer, H., Luckabauer, M. & Sprengel, W., 2013, In : Defect and diffusion forum [Elektronische Resource]. 333, p. 1-25

Research output: Contribution to journalArticleResearchpeer-review

2012

Dilatometry: a powerful tool for the study of defects in ultrafine grained metals

Sprengel, W., Oberdorfer, B., Steyskal, E-M. & Würschum, R., 2012, In : Journal of Materials Science. 47, p. 7921-7925

Research output: Contribution to journalArticleResearchpeer-review

Direct experimental determination of grain boundary excess volume in metals

Steyskal, E-M., Oberdorfer, B., Sprengel, W., Zehetbauer, M., Pippan, R. & Würschum, R., 2012, In : Physical Review Letters. 108, p. 055504/1-055504/5

Research output: Contribution to journalArticleResearchpeer-review

Element-specific study of local segmental dynamics of polyethylene terephthalate upon physical aging

Sato, K. & Sprengel, W., 2012, In : The journal of chemical physics. 137, p. 104906/1-104906/7

Research output: Contribution to journalArticleResearchpeer-review

Free volumes in bulk nanocrystalline metals studied by the complementary techniques of positron annihilation and dilatometry

Würschum, R., Oberdorfer, B., Steyskal, E-M., Sprengel, W., Puff, W., Pikart, P., Hugenschmidt, C. & Pippan, R., 2012, In : Physica / B. 407, p. 2670-2675

Research output: Contribution to journalArticleResearchpeer-review

2011

Recrystallization kinetics of ultrafine-grained Ni studied by dilatometry

Oberdorfer, B., Steyskal, E-M., Sprengel, W., Pippan, R., Zehetbauer, M., Puff, W. & Würschum, R., 2011, In : Journal of Alloys and Compounds. 509, p. 5309-5311

Research output: Contribution to journalArticleResearchpeer-review

2010

Absolute concentration of free volume-type defects in ultrafine-grained Fe prepared by high-pressure torsion

Oberdorfer, B., Lorenzoni, B., Unger, K., Sprengel, W., Zehetbauer, M., Pippan, R. & Würschum, R., 2010, In : Scripta materialia. 63, p. 452-455

Research output: Contribution to journalArticleResearchpeer-review

In-situ probing of fast defect annealing in Cu and Ni with a high-intensity positron beam

Oberdorfer, B., Steyskal, E. . M., Sprengel, W., Puff, W., Pikart, P., Hugenschmidt, C., Zehetbauer, M., Pippan, R. & Würschum, R., 2010, In : Physical Review Letters. 105, p. 146101-1-146101-4

Research output: Contribution to journalArticleResearchpeer-review

2009

Atomic-Scale Structural Evolution upon Crystallite Nucleation and Growth in Amorphous Fe78B13Si9

Sato, K., Murakami, H., Fujimoto, K., Nakata, M., Sprengel, W., Schaefer, H-E., Ueji, Y., Amemiya, Y. & Kobayashi, Y., 2009, In : Japanese journal of applied physics. 48, p. 085505-1-085505-4

Research output: Contribution to journalArticleResearchpeer-review

Investigation of Structural Vacancies in Titanium Monoxide by Electron-Positron Annihilation

Valeeva, A. A., Rempel, A. A., Sprengel, W. & Schaefer, H-E., 2009, In : Physics of solid state. 51, 5, p. 924-929

Research output: Contribution to journalArticleResearchpeer-review

Nanocrystallization mechanism of amorphous Fe78B13Si9

Sato, K., Murakami, H., Sprengel, W., Schaefer, H-E. & Kobayashi, Y., 2009, In : Applied Physics Letters. 94, p. 171904-1-171904-1

Research output: Contribution to journalArticleResearchpeer-review

2007

Nanocrystallization-induced structural evolution of intergranular amorphous phase in Fe78B13Si9 alloy

Sato, K., Murakami, H., Kobayashi, Y., Sprengel, W. & Schaefer, H-E., 2007, In : Journal of non-crystalline solids. 353, p. 1882-1885

Research output: Contribution to journalArticleResearchpeer-review

Reversible atomic processes as basic mechanisms of the glass transition

Ye, F., Sprengel, W., Wunderlich, R. K., Fecht, H-J. & Schaefer, H-E., 2007, In : Proceedings of the National Academy of Sciences of the United States of America. 104, p. 12962-12965

Research output: Contribution to journalArticleResearchpeer-review

Vacancies on the Ti sublattice in titanium monoxide TiOy studied

Valeeva, A. A., Rempel, A. A., Sprengel, W. & Schaefer, H-E., 2007, In : Physical Review / B. 75, p. 094107-094107

Research output: Contribution to journalArticleResearchpeer-review

2006

Thermal evolution of free volumes and of crystallization in amorphous Si-B-C-N ceramics

Reichle, K. J., Reimann, K., Sprengel, W., Rempel, A. A., Müller, A. & Schaefer, H-E., 2006, In : International journal of materials research = Zeitschrift für Metallkunde. 97, 5, p. 621-625

Research output: Contribution to journalArticleResearchpeer-review