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Manufacture of powder compacts

Rosato, A. D. and Vreeland, T., Jr. and Prinz, F. B. (1991) Manufacture of powder compacts. International Materials Reviews, 36 (2). pp. 45-61. ISSN 0950-6608.

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The quality of a powder compact depends on the uniformity of the particle size distribution throughout its volume and the retaining of a refined microstructure during the final consolidation process. This paper deals with the creation of uniform green compacts from powders and the dynamic consolidation process. An overview of basic issues and problems concerning the behaviour and handling of granular materials is presented, emphasising recent results on particle size segregation induced through vibrations and occurring in granular flows. The implications of segregation on the production of green compacts are introduced followed by a discussion of their formation via ultrasonic vibrations. The dynamic (shock) consolidation process to form dense compacts with metastable or refined microstructures from green compacts is described. A critical review and discussion of the kinetics and energetics in the shock consolidation process, including particle bonding and shock energy distribution, is presented.

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Additional Information:© 1991 The Institute of Metals and ASM International. The authors wish to acknowledge the valuable assistance provided by Dr W. Kromp, University of Vienna, Austria. A. D. Rosato and F. B. Prinz wish to acknowledge support of DARPA/NRL, Contract No. N00014-82-K-2064. They gratefully appreciate the encouragement of Dr B. B. Rath, NRL, throughout this work. T. Vreeland's work was supported by an NSF Materials Research Group Grant, DMR-881795.
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Office of Naval Research (ONR)N00014-82-K-2064
Issue or Number:2
Record Number:CaltechAUTHORS:20150223-151956150
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55118
Deposited By: Tony Diaz
Deposited On:23 Feb 2015 23:37
Last Modified:03 Oct 2019 08:03

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