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Nanomaterials 2016, 6(6), 101;

TiAl3-TiN Composite Nanoparticles Produced by Hydrogen Plasma-Metal Reaction: Synthesis, Passivation, and Characterization

School of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023, China
Department of Materials Engineering, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
Author to whom correspondence should be addressed.
Academic Editor: Krasimir Vasilev
Received: 5 April 2016 / Revised: 18 May 2016 / Accepted: 23 May 2016 / Published: 1 June 2016
(This article belongs to the Special Issue Plasma Nanoengineering and Nanofabrication)
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TiAl3 and TiN composite nanoparticles were continuously synthesized from Ti–48Al master alloy by hydrogen plasma-metal reaction in a N2, H2 and Ar atmosphere. The phase, morphology, and size of the nanoparticles were studied by X-ray diffraction (XRD) and transmission electronic microscopy (TEM). X-ray photoelectron spectroscopy (XPS) and evolved gas analysis (EGA) were used to analyze the surface phase constitution and oxygen content of the nanoparticles. The as-synthesized nanopowders were mainly composed of nearly spherical TiAl3 and tetragonal TiN phases, with a mean diameter of ~42 nm and mass fractions of 49.1% and 24.3%, respectively. Passivation in the atmosphere of Ar and O2 for 24 h at room temperature led to the formation of amorphous Al2O3 shells on the TiAl3 particle surface, with a mean thickness of ~5.0 nm and a mass fraction of ~23.5%, as well as TiO2 with a mass fraction of ~3.2%. View Full-Text
Keywords: nanoparticles; TiAl3; TiN; hydrogen plasma-metal reaction; passivation nanoparticles; TiAl3; TiN; hydrogen plasma-metal reaction; passivation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, J.Y.; Mei, Q.S. TiAl3-TiN Composite Nanoparticles Produced by Hydrogen Plasma-Metal Reaction: Synthesis, Passivation, and Characterization. Nanomaterials 2016, 6, 101.

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