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Structural and thermodynamic properties of heavily mechanically deformed Ru and AlRu

Hellstern, E. and Fecht, H. J. and Fu, Z. and Johnson, W. L. (1989) Structural and thermodynamic properties of heavily mechanically deformed Ru and AlRu. Journal of Applied Physics, 65 (1). pp. 305-310. ISSN 0021-8979. http://resolver.caltech.edu/CaltechAUTHORS:HELjap89

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Abstract

We report on high-energy ball milling of Ru and AlRu. The deformation results in a drastic decrease of the crystal size to a nanometer scale and in an increase of atomic-level strain. This is accompanied by a disordering of the crystal lattice as is shown by means of the long-range-order parameter in AlRu. The specific heat increases by more than 15%–20%, indicating large changes in the vibrational and configurational part of the entropy. The stored energy of cold work is up to 6 kJ/mol for AlRu and 10 kJ/mol for Ru. This is almost 40% of the heat of fusion of Ru and exceeds by far the energies stored by other deformation processes.


Item Type:Article
Additional Information:Copyright © 1989 American Institute of Physics (Received 22 July 1988; accepted 13 September 1988) This work was supported by the U.S. Department of Energy (DOE Contract No. DE-FG03-86ER45242). One of the authors (E.H.) gratefully acknowledges partial support by an Ernst von Siemens grant. Special thanks are given to R. Birringer and C. Garland for the TEM work, L. Anthony for his help in data analysis, and C. Geremia for technical assistance.
Subject Keywords:THERMODYNAMIC PROPERTIES; RUTHENIUM; ALUMINIUM COMPOUNDS; RUTHENIUM COMPOUNDS; MILLING; CRYSTAL STRUCTURE; DEFORMATION; ENTROPY; SPECIFIC HEAT; INTERMETALLIC COMPOUNDS; CRYSTAL DEFECTS
Record Number:CaltechAUTHORS:HELjap89
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:HELjap89
Alternative URL:http://dx.doi.org/10.1063/1.342541
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5621
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:26 Oct 2006
Last Modified:26 Dec 2012 09:13

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