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Titanium Oxidation During Thermal Treatment: Inhibiting Role of Nitrogen and Epitaxial Orientation Relations Evidenced by EBSD
Author(s) -
Lenarduzzi E.,
Bounie P.,
Schuman C.,
Philippe M.J.,
Petelot D.
Publication year - 2003
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200300390
Subject(s) - materials science , nitrogen , titanium , thermal oxidation , oxygen , thermal treatment , metal , layer (electronics) , oxide , electron backscatter diffraction , octahedron , diffusion , thermal , argon , nitrogen gas , metallurgy , chemical engineering , inorganic chemistry , crystallography , composite material , chemistry , microstructure , crystal structure , organic chemistry , thermodynamics , physics , engineering
A neutral gas as an oxidation inhibitor may actually be counter‐productive! This is the surprise bottom line of the authors' investigations on thermal treatment of titanium. The 1 % of oxygen in argon build up an oxide layer which is thicker than when Ti is heated in ordinary air—since the latter contains nitrogen. Nitrogen plays the role of a diffusion barrier as it occupies the octahedral sites preventing oxygen from diffusing into the metal.