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  4. 53. The Department of Refractory Materials Physics and Technology
  5. Brodnikovskyy M.
  6. Article

Resistance of Titanium– and Zirconium–Chromium Alloys to Air Oxidation

M.Brodnikovskyy,
 
I.Orishich,
 
† N.Poryadchenko,
 
T.Kuznetsova,
 
N.D.Khmelyuk,
 
H.Rokitskaya
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #07/08
http://www.materials.kiev.ua/article/1597

Abstract

The influence of chromium (0.5-8 at.%) on the oxidation resistance of binary Ti and Zr alloys at 500–700 °C and 50 h holding is investigated. It is shown that the weight gain obeys parabolic and linear oxidation kinetics at 500–600 °С and 700 °C, respectively. It is established that 8 at.% chromium decreases the heat resistance of titanium by 50–67%, but the chromium content up to 4 at.% hardly influences the heat resistance of zirconium. Higher chromium concentrations also decrease the oxidation resistance of zirconium. The authors connect the results for titanium with the specific chemical interaction of titanium and zirconium oxides and for zirconium with the structural factor, which appears because of brittle ZrCr2 intermetallide.


ALLOYS, CHROMIUM, KINETICS, OXIDATION, SCALE, TITANIUM, ZIRCONIUM

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