论文部分内容阅读
采用静态高压釜实验研究了NZ2合金在360℃,18.6MPa含Li水和400℃,10.3MPa蒸汽中的腐蚀动力学,通过X射线衍射法研究了NZ2合金在两种介质中腐蚀不同时间后氧化膜的晶体结构。结果表明:NZ2合金在360℃含Li水中腐蚀速率较400℃蒸汽中的低;随着腐蚀时间的延长,氧化膜中四方氧化锆含量逐渐降低,单斜氧化锆含量逐渐增高,四方氧化锆向单斜氧化锆转变。腐蚀转折时,氧化膜中出现了立方氧化锆,随后氧化膜中立方相含量明显增多,说明四方相向单斜相转变过程中,立方相是作为过渡相存在。氧化膜中四方相含量越高,腐蚀速率越低。
The corrosion kinetics of NZ2 alloy in 360 ℃, 18.6MPa Li-containing water and steam at 400 ℃ and 10.3MPa was studied by static autoclave experiment. The corrosion of NZ2 alloy was studied by X-ray diffraction (XRD) The crystal structure of the membrane. The results show that the corrosion rate of NZ2 alloy in Li containing water at 360 ℃ is lower than that at 400 ℃. With the increase of corrosion time, the content of tetragonal zirconia in the oxide film gradually decreases and the content of monoclinic zirconia gradually increases. Monoclinic zirconia transformation. During the corrosion transition, cubic zirconia appeared in the oxide film, and then the content of cubic phase in the oxide film increased obviously, indicating that the cubic phase exists as a transition phase during the tetragonal phase transition to monoclinic phase. The higher the content of tetragonal phase in the oxide film, the lower the corrosion rate.