Mechanical attrition and mechanical alloying have been developed as a
versatile alternative to other processing routes in preparing
nanophase materials with a broad range of chemical compositions and
atomic structures. This internal refining process with a reduction of
the average grain size by a factor of 103 - 104 results from the
creation and self-organization of small-angle and high-angle grain
boundaries within the powder particles during the milling process as
observed by X-ray, neutron and electron difraction methods. A change
of the thermodynamic, mechanical and chemical properties of these
materials has been observed with the properties of nanophase materials
becoming controlled by grain size distribution and the cohesive energy
of the grain or interphase boundaries. It is expected that the study
of mechanical attrition processes in the future not only opens new
processing routes for a variety of advanced nanophase materials but
also improves the understanding of technologically relevant
deformation processes, e.g. surface wear, on a nanoscopic level.
Please note the addresses of Prof. Fecht and Dr. Werner:
Prof. Dr. H.-J. Fecht
Abt. Werkstoffe der Elektrotechnik
Fakultät für Ingenieurwissenschaften
Universität Ulm Tel.: +49 (0)731 50-25490 (-25491)
Albert-Einstein-Allee 47 Fax: +49 (0)731 50-25488
D-89081 Ulm E-mail: [email protected]
Dr.-Ing. Matthias Werner
Innovationsteam Mikrotechnologie
Senior Scientific Manager
Deutsche Bank AG Tel.: +49(0)30 340742-48
Unter den Linden 13-15 Fax: +49(0)30 340742-49
D-10117 Berlin E-mail:
[1][email protected]
References
1. mailto:[email protected]
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