基于扩展的非均匀热浴双温度模型对SiC/SiC界面辐照损伤机理研究

项目名称： 基于扩展的非均匀热浴双温度模型对SiC/SiC界面辐照损伤机理研究

项目编号： No.11505003

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 张超

作者单位： 安徽理工大学

项目金额： 20万元

中文摘要： 材料的辐照损伤问题是制约先进核能发展的关键因素之一。基于精确的理论模型对核反应堆不同候选结构材料进行计算模拟是探究材料辐照损伤及其机理的一种有效方法。本项目拟基于扩展的非均匀热浴双温度模型对SiC/SiC界面辐照损伤及其机理进行基础科学研究。具体内容如下:(1) 建立扩展的非均匀热浴双温度模型，使其能够准确描述复合材料辐照损伤过程；(2) 研究电子阻止和电子-声子耦合效应对SiC/SiC界面辐照损伤的影响；(3) 研究辐照过程中局域热对SiC/SiC界面损伤的影响；(4) 研究SiC/SiC界面相厚度和空间取向对界面辐照损伤的影响，以获取SiC/SiC材料抗辐照的最佳结构模型。项目的完成可望为复合材料辐照损伤过程的描述提供可靠的理论模型，并为碳化硅复合材料界面辐照损伤机理提供理论依据，使碳化硅复合材料界面设计前进重要的一步。

中文关键词： 辐照损伤；电子激发效应；纤维/基体界面；双温度模型；局域热

英文摘要： The problem of the irradiation damage in the material is one of the key factors restricting the development of the advanced nuclear energy. Nowadays, the computer simulation based on the accurate theoretical model for different candidate structural materials of the nuclear reactor is one effective approach to explore the irradiation damage and its mechanism. The irradiation damage and the mechanism of the SiC/SiC interface are systematically investigated based on an extended inhomogeneous thermostat two temperature model. The detailed content is organized as follows: (1) An extended inhomogeneous thermostat two temperature model is established, which can be used for accurately describing the processes of the irradiation damage of composite materials; (2) The irradiation damage of the SiC/SiC interface is studied by considering the electronic stopping and the electron-phonon coupling effects; (3) The local heat dependence of the irradiation damage in the SiC/SiC interface is studied during the irradiation processes; .(4) In order to obtain the best radiation resistance performance, the effects of thickness and orientation of the interphase on the irradiation damage of the SiC/SiC interface are also investigated. It is highly expected that the completion of this project can provide a better theoretical model for the description of the irradiation damage process of materials, and also some theoretical evidences for the irradiation damage and the mechanisms of the interface of SiC composites, which will result in a critical step forward for design of the interface of SiC composites.

英文关键词： Irradiation damage;Electronic excitation effect;The fiber/matrix interface;Two temperature model;Local heat