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中国低活化马氏体钢(CLAM钢)是国内开发的核能系统结构材料。本工作通过重离子辐照检测CLAM钢的抗辐照性能,室温下辐照到损伤剂量0~90 dpa,15 dpa剂量下从室温到800℃变温辐照。变温辐照样品的正电子湮没寿命谱测量表明在约500℃时出现最大空位团,其平均直径为0.59 nm,大约含9个空位。室温辐照样品的正电子湮没寿命谱测量表明空位团的尺寸随辐照剂量增加而增大,在90 dpa时达到平均直径0.6 nm,大约含9个空位。实验结果表明,CLAM具有较好的抗辐照性能。
China’s low-activation martensitic steel (CLAM steel) is a nuclear energy structural material developed in China. In this work, the anti-irradiation properties of CLAM steel were detected by heavy ion irradiation. The irradiation dose was 0-90 dpa at room temperature and varied from room temperature to 800 ° C at a dose of 15 dpa. Positron annihilation lifetime spectroscopy measurements of samples exposed to variable temperature show that at about 500 ° C, the largest vacancies occur, with an average diameter of 0.59 nm, containing approximately 9 vacancies. Positron annihilation lifetime spectroscopy measurements of irradiated samples at room temperature show that the size of the vacancy clusters increases with increasing irradiation dose, reaching an average diameter of 0.6 nm at 90 dpa, containing approximately 9 vacancies. The experimental results show that, CLAM has good anti-radiation properties.