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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Sažetak

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.

Vrsta građe:	Rad objavljen u časopisu
Ključne riječi:	corrosion; oxidation; alloys; Zr2Cu; high temperature; selective; behavior; temperature; system; alloy
Područja:	PRIRODNE ZNANOSTI > Kemija
Zavodi:	Zavod za kemiju materijala
Projekti:	Naziv projekta Voditelj projekta Šifra projekta Vrsta projekta Intermetalni spojevi i metalni hidridi Želimir Blažina 00980906 MZOS
Pohranio:	Matija Paljević
Datum pohrane:	26 Nov 2013 11:52
URI:	https://fulir.irb.hr/id/eprint/1126

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