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Plasma Torch Production of Ti-Al Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Jonathan Phillips ,
Lili Cheng ,
Claudia Luhrs ,
Hugo Zea ,
Matthew Courtney  and
Caleb Hanson
Jonathan Phillips
Affiliation:
jphillips@lanl.gov, Los Alamos National Laboratory, Engineering Sciences and Applications Division, P.O. Box 1663, Los Alamos, NM, 87545, Los Alamos, NM, 87545, United States
Lili Cheng
Affiliation:
lcheng@lanl.gov, Los Alamos National Lab, Los Alamos, NM, 87545, United States
Claudia Luhrs
Affiliation:
ccluhrs@unm.edu, University Of New Mexico, Mechanical Engineering Department, Albuquerque, NM, 87131, United States
Hugo Zea
Affiliation:
huzea@unm.edu, University Of New Mexico, Mechanical Engineering Department, Albuquerque, NM, 87131, United States
Matthew Courtney
Affiliation:
atreau@unm.edu, University Of New Mexico, Mechanical Engineering Department, Albuquerque, NM, 87131, United States
Caleb Hanson
Affiliation:
chanson1@unm.edu, University Of New Mexico, Mechanical Engineering Department, Albuquerque, NM, 87131, United States
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Abstract

Using the Aerosol-through-Plasma (A-T-P) technique high surface area (from 100 to 203 m2/gm) bi-cationic (Ti-Al) oxide particles of a range of stoichiometries were produced that showed remarkable resistance to sintering. Specifically, we found that homogeneous nanoparticles with surface areas greater than 150 m2/gm were produced at all stoichiometries. In particular, for particles with a Ti:Al ratio of 1:3 a surface area of just over 200 m2/gm was measured using the BET method. The most significant characteristic of these particles was that their sinter resistance was far superior to that of TiAl particles produced using any other method. For example, A-T-P generated particles retained >70% of their surface area even after sintering at 1000 C for five hours. In contrast, particles made using all other methods lost virtually all of their surface area after an 800 C treatment.

Keywords

oxidenanostructureplasma deposition
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH08-42
Copyright
Copyright © Materials Research Society 2008

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