Research and development of highly equipped experimental technique for materials in light water reactors

“轻水堆材料高装备实验技术的研究与开发”研究项目始于1995年，一直持续到1997年，历时三年。这份报告是研究项目的总结，其中包括以下结果。(1)锆合金及其氧化膜在电子和离子辐照下的显微组织演变：我们确定了间隙和空位的迁移能分别为0.1-0.22和1.0-1.1eV。(2) 1 MeV电子辐照下锆合金电导率的原位测量氧化机理：氧化锆电导率的速率控制过程是电子迁移。这表明氧化过程的速率控制过程是氧离子的迁移。(3)评价金属应力-应变性能的超显微硬度和维氏硬度技术的发展：从硬度的载荷依赖性和塑性变形面积的测量出发，提出了一种评价金属应力-应变性能的新方法，即利用超显微硬度和维氏硬度技术测定金属的屈服应力和应变硬化指数。(4)利用超显微硬度技术对离子辐照金属和氧化物陶瓷进行辐射硬化：利用所提出的超显微硬度技术对高能离子辐照铜进行应力应变性能评价。

The research project of 'Research and development of highly equipped experimental technique for materials in light water reactors' started in 1995 and have continued to 1997 for three years. This report is the summary of the research project which includes the following for results.(1) Microstructural evolution under electron and ion irradiation in zirconium alloys and their oxide films : we have determined the migration energies of interstitials and vacancies to be 0.1-0.22 and 1.0-1.1eV,respectively.(2) oxidation mechanism of zirconium alloys by using 'in situ' measurements of electrical conductivity under 1 MeV electron irradiation : the rate controlling process of electrical conductivity in zirconium oxide was electron migration. This indicate that the rate controlling process of oxidation is the migration of oxygen ions.(3) development of ultra-microhardness and Vickers hardness technique for evaluating stress-strain properties of metals : From the measurements of the load-dependence of hardness and plastically deformed area, we have proposed a new method for evaluation stress-strain properties, that is, the yield stress and strain hardening exponent of metals by using ultra-microhardness and Vickers hardness technique.(4) Radiation hardening of ion-irradiated metals and oxide ceramics by using the ultra-microhardness technique : high energy ion irradiated copper was subjected to evaluate stress-strain properties by using the proposed ultra-microhardness technique.