The relationship between consolidation behavior and particle size in Fe nanometric powders
- CECM/CNRS, Vitry sur Seinne (France)
The interest in ultrafine particles with diameters of the order of 10's of nanometers has been growing during recent years. This interest stems specially from the unique physical and chemical properties that matter presents in the ultra dispersed state and the special properties of material having a nanocrystalline structure. Such materials appear to present potentially interesting applications. Recent investigations have been promoted by new methods of ultrafine powder production. A promising aspect of ultrafine powders is the preparation of bulk materials by sintering. As a matter of fact, small particle size decreases the sintering temperature which should allow alloys, ceramics and cermets having attractive mechanical properties to be obtained. The present study is a quantitative analysis of the consolidation process of ultrafine iron powders and compared their behavior with that of micrometric powders. Indeed, few studies have been carried out using metallic powders and there is some work suggesting that products with high green density (the density after pressing prior to sintering) may not be obtainable, whatever the consolidation pressure used.
- OSTI ID:
- 7185881
- Journal Information:
- Scripta Metallurgica et Materialia; (United States), Vol. 32:1; ISSN 0956-716X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IRON
COMPACTING
GRAIN SIZE
MECHANICAL PROPERTIES
MICROSTRUCTURE
PARTICLE SIZE
POWDERS
STRAIN HARDENING
TRANSMISSION ELECTRON MICROSCOPY
YIELD STRENGTH
ELECTRON MICROSCOPY
ELEMENTS
HARDENING
METALS
MICROSCOPY
SIZE
TRANSITION ELEMENTS
360101* - Metals & Alloys- Preparation & Fabrication
360102 - Metals & Alloys- Structure & Phase Studies
360103 - Metals & Alloys- Mechanical Properties