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Influences of oxygen impurity contained in nitrogen on the reaction of titanium with nitrogen

Published online by Cambridge University Press:  31 January 2011

Fu-Hsing Lu ,
Bor-Feng Jiang ,
Jen-Li Lo  and
Mu-Hsuan Chan
Fu-Hsing Lu*
Affiliation:
Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan
Mu-Hsuan Chan
Affiliation:
Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan
*
a) Address all correspondence to this author. e-mail: fhlu@dragon.nchu.edu.tw
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Abstract

In this work, Ti pellets were selected as a model system to investigate the influences of oxygen impurity in nitrogen gas on the reaction of a metal with the nitrogen. Analyzing changes in the in situ oxygen partial pressures when titanium specimens were annealed in the oxygen-containing nitrogen shows that the dissolution of oxygen in Ti and TiNx is exothermic, and the solubility decreases as the temperature increases. X-ray diffraction results show that nitridation of Ti occurred before oxidation, even in an oxygen-containing nitrogen atmosphere. Kinetics apparently predominates over thermodynamics at low temperatures in such a system.

Keywords

AnnealingNitrideTi
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 7 , July 2009 , pp. 2400 - 2408
Copyright
Copyright © Materials Research Society 2009

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