Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


한국표면공학회지 (40권4호 180-184)

Steam Pressure Effects on the Oxidation of Low-Sn Zircaloy-4 at High Temperatures

고압 수증기에 따른 Low-Sn Zircaloy-4의 고온 산화 거동

Yang, Sung-Woo;Park, Kwang-Heon;

경희대학교 원자력공학과;
Kyung Hee University;

DOI : 10.5695/JKISE.2007.40.4.180


A new zirconium alloy, low-Sn Zircaloy-4 was investigated to see the effects of high pressure steam on the oxidation at high temperatures. High pressure steam turned out to enhance the oxidation at high temperatures below $1000^{circ}C$. The oxide layer groved to deviate from the uniform layer under high steam pressures, and usually cracks were found at the thicker parts in the oxide layer. High pressure steam seems to destabilize the tetragonal oxides near the metal layer, and the monoclinic oxides transformed from the destabilized tetragonal oxides are structurally not sound, resulting in enhanced oxidation under high pressure steam.


Zircaloy;Oxidation;High Pressure Steam;Tetragonal oxides;