EFFECT OF STRUCTURAL CONDITION OF CHROMIUM ON OXIDATION RESISTANCE OF COMPOSITE POWDER BASED ON β2-FeAl REINFORCED WITH Al2O3 INCLUSIONS
Abstract
The results of studies of effect of structural state of chromium in the composite SHS-powder FeAl(Cr)/Al2O3 on its resistance to oxidation are presented. To study the possibility of alloying of mono-aluminide iron with chromium, the synthesis reaction mixture containing a source of chromium as chromium oxide powders or alloy PХ-30 were used. Powders were prepared by self-propagating mechanoactivated high-temperature synthesis (MASHS). Cyclic oxidation tests were conducted at a temperature of 700–1000°C in an air atmosphere for 2 hours. In the case of alloying the intermetallic alloy PX-30, the resultant powder exhibits a greater weight gain in contrast to powders prepared from a reaction mixture comprising a chromium oxide in which chromium is not only alloyed aluminide but is present in a free state.
About the Authors
A. I. Letsko
Powder Metallurgy Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
T. L. Talako
Powder Metallurgy Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
N. M. Parnitsky
Powder Metallurgy Institute of the National Academy of Sciences of Belarus
Belarus
Belarus
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