Selective oxidation of zirconium in Zr2Cu

Paljević, Matija; Tudja, Marijan (1999) Selective oxidation of zirconium in Zr2Cu. Croatica Chemica Acta, 72 (2-3). pp. 413-426. ISSN 0011-1643

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Abstract

The high-temperature oxidation of Zr2Cu in dry oxygen is characterized by selective oxidation of zirconium. The excess of copper is accumulated in the matrix alloy at the alloy-oxide interface forming the Zr8Cu5 phase. The oxide layer consists of monoclinic ZrO2 and a small amount of CuO. Additionally, tetragonal ZrO2 appears up to 873 K at the surface, and Cu2O is formed above 873 K, deeper in the oxide layer. The reaction kinetics obeys a parabolic rate law. An activation energy of 54.4 kJ/mol has been estimated in the temperature range 773-1123 K. An anomalous decrease of the oxidation rate occurs at 1155-1223 K, after a strong reaction at 1073-1150 K.

Item Type:	Article
Uncontrolled Keywords:	corrosion; oxidation; alloys; Zr2Cu; high temperature; selective; behavior; temperature; system; alloy
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Chemistry
Projects:	Project title Project leader Project code Project type Intermetalni spojevi i metalni hidridi Želimir Blažina 00980906 MZOS
Depositing User:	Matija Paljević
Date Deposited:	26 Nov 2013 11:52
URI:	http://fulir.irb.hr/id/eprint/1126

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