摘要
为了研究锆离子轰击对Zr-4合金锆耐蚀性的影响,用金属蒸汽真空弧(MEVVA)源对纯锆样品进行了1?015 至2?017 cm-2 的锆离子轰击,加速电压为50 kV。用X-射线光电子谱(XPS)对轰击表面各元素进行价态分析;用俄歇电子能谱(AES)分析氧化膜厚度。对轰击样品进行3次极化测量,以评价轰击样品在1N 硫酸溶液中的耐蚀性。利用慢正电子谱研究了轰击样品表面的缺陷情况。研究结果表明:除1×1015cm-2剂量外,轰击样品的耐蚀性都好于空白Zr-4,且5×1016 cm-2离子轰击样品的耐蚀性最好,轰击样品的自腐蚀电位大体上随着剂量的增加而下降。轰击Zr-4样品的腐蚀行为与其慢正电子谱之间存在着一定的对应关系。
In order to investigate the affect of Zr-ion bombardment on the corrosion resistance of zircaloy-4, specimens were bombarded by zirconium ions with a fluence range from 1×l015 to 2×l017 ions/cm2, using a MEVVA source at an extract voltage of 50 kV. The valence of the surface layer was analyzed by X-ray photoemission spectroscopy (XPS); the thickness of the oxide film was measured by Auger electron spectroscopy (AES). Three-sweep potentiodynamic polarization measurement was used to value the corrosion resistance of bombarded zirconium in a 1N H2SO4 solution. Slow positron annihilation spectroscopy (PAS) measurement was employed to obtain to the distribution of the implantation induced defects. A significant improvement of corrosion resistance was achieved compared with as-received zircaloy-4 except for 1×1015 Ions/cm2 fluence, and the sample with 5×106 ions/cm2 fluence is most anti-corrosive in all the samples. The natural corrosion potentials of bombarded samples decline with raising the bombarded fluences. It was found that there was some relationship between the corrosion behavior of Zr-ion bombarded zircaloy-4 and the slow positron annihilation spectroscopy (PAS).
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2004年第4期361-365,共5页
Nuclear Power Engineering
基金
国家自然科学基金(G2000067207-1)
关键词
ZR-4合金
耐蚀性
离子轰击
动电位极化
慢正电子谱
Auger electron spectroscopy
Corrosion resistance
Corrosion resistant alloys
Ion bombardment
Ion implantation
Oxides
Photoemission
Polarization
Positron annihilation spectroscopy
Sulfuric acid
Surface testing
Thickness measurement
X ray spectroscopy