原位生长β-氮化硅晶须强韧化微晶玻璃基高温结构/功能一体化材料的形成机理与性能调控

项目名称： 原位生长β-氮化硅晶须强韧化微晶玻璃基高温结构/功能一体化材料的形成机理与性能调控

项目编号： No.51502349

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 罗志伟

作者单位： 中南大学

项目金额： 21万元

中文摘要： 本项目以国家航空航天技术、电子通讯等领域对先进高温结构/功能一体化材料的共性需求为背景，制备原位生长β-氮化硅晶须强韧化微晶玻璃基高温结构/功能一体化材料。主要研究β-氮化硅晶须的原位生长过程和微晶相的析晶机理；原位生长β-氮化硅晶须强韧化微晶玻璃基高温结构/功能一体化材料的复合界面形成及作用机制、强韧化机理、性能调控及高温应用等。拟通过成分与工艺设计，系统研究一体化材料的组成和工艺与致密度、晶相种类、晶粒大小、微晶体分布及形貌的关系，探明原位生长β-氮化硅晶须强韧化微晶玻璃基高温结构/功能一体化材料的组成-工艺-结构与性能之间的相关性。最终获得综合性能优良的微晶玻璃基高温结构/功能一体化材料的可控制备技术，建立性能指标体系，为其实际应用作技术储备。本项目的开发研究对于促进高温结构/功能一体化新材料的开发及其制备科学的发展，有着十分重要的实用价值和科学意义。

中文关键词： 微晶玻璃；原位生长；晶须；强韧化；氮化硅

英文摘要： This project takes the demand of national aeronautics and space technology, electronic communications and other fields on advanced high-temperature structure and function-integrated materials as the background, prepared by in-situ grown β-Si3N4 whisker strengthening & toughening glass-ceramics based high-temperature structure and function-integrated materials. The in-situ grown process of β-Si3N4 whisker and crystallization mechanism of microcrystals phase, composite interface formation and function mechanism, strengthening and toughening mechanism, regulation of performance and high temperature applications of in-situ growth of β-Si3N4 whisker strengthening & toughening glass-ceramics based high-temperature structure and function-integrated materials were mainly investigated. Through the design of composition and process, systematic study of the relationship among the components, process and the density of the materials, type, size, distribution, shape and microstructure of crystallite particle in glass-ceramic composites are performed, with exploring the relationship among the composition, process, structure and properties of the in-situ grown β-Si3N4 whisker strengthening & toughening glass-ceramics based high-temperature structure and function-integrated materials. The final controllable preparation technology of the glass-ceramics based high-temperature structure and function-integrated materials with excellent comprehensive properties are obtained, accompanying with establishing the performance index system of these composites, with comparing it with similar materials, in order to make a technical storage for an actual application. The development research of this project shows important practical value and scientific significance for promoting the development and of new type of high-temperature structure and function-integrated materials.

英文关键词： glass-ceramics;in-situ grown;whisker;strengthening & toughening;Si3N4