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| HIGH TEMPERATURE STEAM OXIDATION OF ZIRCALOY-4 |
| Chen Heming Ma Chunlai He Xiaopei Bai Xinde (Tsinghun University) |
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Abstract Oxidation behavior of zircaloy-4 in 1000℃～1400℃ flowing steam was studied, and rate laws of the weight-gain as well as the growth of the oxide and alpha layers were obtained.Weight-gain and thickness growth of the oxide layer in general followed the parabolic rate laws.In the long term oxidation at temperatures above 1225℃,the isother- mal oxidation,curve of zircaloy-4 transformed in shape during oxidation.The dependence of the weight-gain and thickness growth rate laws on temperature observed the Arrhenius Equation.Also conducted was the measurement of stress change during oxidation at tem- perature of 650℃～800℃ for zirconium and zircaloy-4 by a bending method.The struc- ture and composition of the oxide films were examined under AES and SEM.
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Received: 25 February 1991
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[5] 陈鹤呜.马春来,核科学工程,No.1,(1982) |
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