Analysis of In-Flight Oxidation During Reactive Spray Atomization and Deposition Processing of Aluminum  

Oleh:

Lavernia, E. J. ; J.-P. Delplanque ; Rangel, R. H.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 122 no. 1 (Feb. 2000), page 126-133.
Topik: oxidation; in - flight oxidation; reactive spray; atomization; deposition processing; aluminium

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ90.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

This work defines a model to predict the characteristics of materials processed using reactive spray atomization and deposition. The materials considered are aluminum alloys while target dispersoids are primarily oxides. These may be obtained by the reaction of oxygen - containing atomization gas mixtures with molten alloy droplets. Droplet position and velocity histories are obtained from the numerical solution of the one - dimensional equation of motion. The energy equation inside the droplet is solved numerically using finite differences to predict the spatially resolved temperature field. The solid / liquid interface progression rate is estimated using a power law while an oxidation rate expression based on the Mott - Cabrera theory is used for the oxide thickness. Such a model should prove very valuable in determining the parameters controlling the volume fraction and the size distribution of the dispersoids for various systems.

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