Obtaining Amorphous and Nanocrystalline Materials by Plastic Deformation and Mechanical Alloying

Hans-Jörg Fecht 

Ulm University, Albert-Einstein-Allee 47, Ulm 89081, Germany

Abstract


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: hans.fecht@e-technik.uni-ulm.de

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]matthias.werner@db.com
References
1. mailto:matthias.werner@db.com

 

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/19 must be provided.

 

Related papers
  1. Petri Dish Generation III
  2. Mechanical properties of nanomaterials
  3. Mechanical property of nano-TiO2 dispersed Al65Cu20Ti15 amorphous/nanocrystalline matrix bulk composite prepared by mechanical alloying and high pressure sintering
  4. Materials Development and Examples of TechTransfer
  5. Microstructural Evolution in Mechanical Alloying and Hot Pressing of Aluminium and 316 Stainless Steel Powder Blend
  6. Kinetic and thermodynamic factors leading to dissolution of cementite in pearlitic steel subjected to severe plastic deformation under pressure
  7. Phase transformations in pearlitic steels induced by severe plastic deformation.
  8. Markets and Economical Aspects of Nano- and Microtechnology Related Products
  9. Diamond- an emerging material for medical and technical applications
  10. High Performance Nanoscale Materials and Bulk Metallic Glass
  11. Microstructure of Surface Layers of Raiways After Heavy Exploatation

Presentation: oral at High Pressure School 1999 (3rd), by Hans-Jörg Fecht
See On-line Journal of High Pressure School 1999 (3rd)

Submitted: 2003-02-16 17:33
Revised:   2009-06-08 12:55