High Temperature Oxidation and Protection of Alloys with High Dissolution of Oxygen

Dear Colleagues,

There is a current trend in the industry, in particular for aeronautic applications, to use lighter materials at higher temperatures. Titanium-based alloys (excluding TiAl intermetallics) are currently limited to temperatures below 500–600 °C for long-term applications (e.g., 10 kh). A major concern for these alloys is their resistance to oxygen embrittlement. Solutions need to be found to limit oxygen dissolution and inward diffusion. Protective coatings have to be developed and tested. Ti, as well as Zr, V or Nb dissolve large amounts of oxygen. The oxidation of Zr-based alloys has been widely studied for nuclear applications. In accidental conditions, these Zr alloys may experience very high temperatures (e.g., 1200 °C) for a short time. Ti-O and Zr-O systems have a lot in common. It is, therefore, of interest to group in a common issue, research works on the high temperature oxidation of both Ti and Zr-based alloys to improve our understanding of O ingress in these alloys and to compare the protection solutions which include the modifications of alloys composition and microstructure, as well as protective coatings. Nb-base alloys can be also of interest.

For this Special Issue, we invite authors to publish research articles or comprehensive reviews on the topics referred to above.

Dr. Daniel Monceau
Guest Editor

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• reports on industrial needs and developments
• thermodynamics of oxygen dissolution in Ti and Zr alloys
• oxygen diffusion in Ti and Zr alloys
• high temperature oxidation of Ti and Zr alloys
• high temperature coatings for Ti and Zr alloys
• oxygen dissolution caracterization
• oxygen embritlement caracterization
• alloy and coatings developments