Atomistic Scale Study of Radiation Effects in ABO3 Perovskites

ABO3 钙钛矿辐射效应的原子尺度研究

• 批准号: EP/L005581/2
• 负责人: Karl Whittle
• 金额: $ 36.98万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FL005581%2F2
• 关键词: Atomistic; Scale; Study; Radiation; Effects

SummaryThe development of nuclear power is at an important juncture, with two competing but in many ways complementary technologies: fusion and fission. However, while the nuclear methodology is different the engineering challenge is the same, that is, the need to remove the generated heat while structures are subject to high levels of radiation damage and residual nuclear products. In particular, radiation damage effects and gas bubble formation are problematic issues for the development of both fusion and GenIV fission reactors. For example in a GenIV fission core, the Xe and Kr gas comes from fission of the fissile nuclei, that is, Pu and U, while in a fusion core He is formed within the D-T plasma. This proposal aims to address these issues using tunable perovskites, as model materials, and focusing on the following issues:1. Crystalline to amorphous transformation mechanisms in tunable ceramics instigated using non-radioactive ion beams.2. Bubble nucleation at micro-structural traps in predominantly fission reactor materials, e.g. oxide based fuels, and ODS materials, but which can be formed by He implantation from fusion plasma He nucleation, and damage in materials for use in fusion cores, such as YBCO superconductors suggested as magnetic containment in for example, ITER and DEMO.The research will be undertaken using the approach of experimental and simulation techniques combined holistically. The experimental study will utilise in-situ and bulk irradiation, primarily in combination with advanced electron microscopy and atom probe tomography. The complementary simulation programme will be based on irradiated materials, but focusing on recovery mechanisms, bubble evolution, and validation of current models. The outcomes of the research will be used in the development of new materials for use as both fuels, for example Inert Matrix, or as magnetic containment devices in ITER/DEMO. The information from this research can also be utilised in other non-standard reactor technologies such as the travelling wave designs.The information derived will also help the design of future waste forms for Pu/U, specifically into new phases capable of tolerating the effects of radiation damage, and He bubble formation.

核能的发展正处于一个重要的关头，有两种相互竞争但在许多方面互补的技术：核聚变和裂变。然而，虽然核方法不同，但工程挑战是相同的，即需要在结构受到高水平辐射损伤和残余核产物的情况下消除产生的热量。特别是，辐射损伤效应和气泡形成是核聚变和GenIV裂变反应堆发展的问题。例如，在GenIV裂变核中，Xe和Kr气体来自可裂变核的裂变，即Pu和U，而在聚变核中，He是在D-T等离子体中形成的。本提案旨在使用可调钙钛矿作为模型材料来解决这些问题，并重点关注以下问题：1。非放射性离子束诱导可调谐陶瓷晶向非晶转变的机理。在主要的裂变反应堆材料（如氧化物基燃料）和ODS材料的微结构陷阱中，气泡成核，但可以通过聚变等离子体的He注入形成。He成核，以及用于聚变堆的材料（如ITER和DEMO中建议的YBCO超导体作为磁性容器）的损坏。本研究将采用实验与模拟技术相结合的方法进行。实验研究将利用原位和整体辐照，主要结合先进的电子显微镜和原子探针断层扫描。补充模拟程序将以辐照材料为基础，但侧重于恢复机制、气泡演化和当前模型的验证。研究成果将用于开发既可作为燃料的新材料，例如惰性基质，也可作为ITER/DEMO中的磁密封装置。本研究的信息也可用于其他非标准反应堆技术，如行波设计。所获得的信息还将有助于设计未来的Pu/U废物形式，特别是能够承受辐射损伤影响的新阶段，以及He泡的形成。

项目成果

Using Machine Learning To Identify Factors That Govern Amorphization of Irradiated Pyrochlores

• DOI: 10.1021/acs.chemmater.6b04666
• 发表时间: 2016-07
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: G. Pilania;K. Whittle;Chao Jiang;R. Grimes;C. Stanek;K. Sickafus;B. Uberuaga

In-situ irradiation of Ca1-xLa2/3xTiO3 defect perovskites: The role of vacancies in recovery

Ca1-xLa2/3xTiO3 缺陷钙钛矿的原位辐照：空位在恢复中的作用

• DOI: 10.1016/j.mtla.2018.08.016
• 发表时间: 2018
• 期刊: Materialia
• 影响因子: 3.4
• 作者: Whittle K

Resistance to amorphisation in Ca1-xLa2x/3TiO3 perovskites - a bulk ion-irradiation study

Ca1-xLa2x/3TiO3 钙钛矿的抗非晶化性 - 一项体离子辐照研究

• DOI: 10.1016/j.actamat.2019.09.006
• 发表时间: 2019
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: Lawson S