Overview
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ABSTRACT
This article deals with the PREP® technology, which is used to manufacture metal powders. This technology consists in making fine droplets of liquid metal using plasma arc melting, which are then centrifugally ejected at the end of a bar rotating at a very high speed. This takes place in a large-diameter water-cooled tank in a helium or argon atmosphere. The rotation speed of the bar is the main factor for setting the average diameter of the particles. Particles are spherical with no satellites. This technology needs great cleanness and caution in order to avoid contamination. Typical particle size is about 100 μm..
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Yvon MILLET: R&D Director Europe TIMET Savoie, Ugine, France
INTRODUCTION
Area: manufacturing technology
Degree of technology diffusion: Emergence | Growth | Maturity
Technologies involved: plasma torch fusion, centrifugation
Applications: aerospace, medical, additive manufacturing, laser fusion cladding
Main French players: TIMET Savoie, Aubert & Duval
Competence centers: ONERA Palaiseau: gas atomization; Plateforme Poudrinnov CEA Grenoble; LERMPS-UTBM Site de Sévenans, Belfort
Other global players: TIMET Powder Metals
Contact: http://www.timet.com
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Material processing - Assembly
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Metal powder manufacturing using the PREP® method
Context
Bibliography
Standards and norms
- Standard test method for apparent density of free-flowing metal powders using the hall flowmeter funnel – ASTM International - ASTM B 212 -
- Standard test methods for flow rate of metal powders using the hall flowmeter funnel – ASTM International - ASTM B 213 -
- Standard test method for sieve analysis of metal powders – ASTM International - ASTM B 214 -
- Standard practices for sampling metal powders...
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
TIMET Metal Powder (supplier of PREP ® all-alloy powders) http://www.timet.com
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