《3种锆合金的高温氧化行为.》.pdf

47 9 Vol.47 No.9 2011 9 1216—1220 ACTA METALLURGICA SINICA Sept. 2011 pp.1216–1220 3  ∗      (, 610041) Thomas Guilbert Jean-Luc B´echade ( Scalay , Gif–sur–Yvette cedex 91191, ) Zr–A Zr–B 700—1200 O2 , , Sn Zr–4 . , 700—1200 , 3 , Zr–B 700 1200 s ; 800 Zr–A Zr–B ; 1000 3 ; 1100 , , . 1100 , 3 . 3 700—1200 Kp . , ,  TG172.5 A 0412−1961(2011)09−1216−05 HIGH TEMPERATURE OXIDATION BEHAVIOURS OF THREE ZIRCONIUM ALLOYS QIU Jun, ZHAO Wenjin Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu 610041 Thomas Guilbert, Jean–Luc Be´chade French Atomic Energy and Alternative Energies Commission, Gif–sur–Yvette cedex 91191, France Correspondent: QIU Jun, associate professor, Tel: (028 E-mail: qjcd@163.com Manuscript received 2011–04–06, in revised form 2011–06–16 ABSTRACT Isothermal oxidation behaviors of Zr–alloys Zr–A and Zr–B cladding tubes in flowing oxygen were measured and compared to Zr–4 cladding tube over a wide temperature range from 700 to 1200 . The results show that the kinetics oxidation curves of all the alloys basically obey the parabolic rate law at the temperature range from 700 to 1200 . In 700 oxidation of alloy Zr–B, a rate transition occurrs at about 1200 s. The rate transitions in 800 curves of alloys Zr–A and Zr–B occurr at about 600 s. The oxidation kinetics curves are changed for all the alloys at 1000 , which is resulted from the crack in the oxide layer due to the ZrO2 phase transformation from a monocli