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12. Corrosion behavior and oxide microstructure of Zr-1Nb-xGe alloys corroded in 360 °C/18.6 MPa deionized water.

Author

Zhang, Jinlong, Hu, Yang, Tu, Liming, Sun, Fengtao, Yao, Meiyi, and Zhou, Bangxin

Subjects
*ZIRCONIUM alloys, *METALLIC oxides, *METAL microstructure, *DEIONIZATION of water, *PHASE transitions, *CORROSION in alloys
Abstract

The corrosion behavior and microstructures of the oxide film on Zr-1Nb- x Ge alloys ( x = 0, 0.05, 0.1 and 0.2, wt%) corroded in deionized water at 360 °C/18.6 MPa were investigated. Results showed that the Zr-1Nb-0.05Ge alloy possessed much better corrosion resistance than the Zr-1Nb alloy. The Ge dissolved in the α-Zr matrix can retard the microstructural transformation of ZrO 2 from the columnar grains to equiaxed grains and delay the process of the defects developing into micro-cracks in the oxide. The amorphous phase produced around the [Zr–Nb–Fe–Cr–O] SPPs can improve the corrosion resistance by relaxing the compressive stress in the oxide films. The sub-oxide layer identified to be cubic-ZrO may improve the corrosion resistance after corrosion transition. [ABSTRACT FROM AUTHOR]

Published
2016
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