晶界非晶结构对Sialon陶瓷多层次相关系的调控:回顾与展望  

Correlation of Intergranular Amorphous Structures on Multi-levelled Phase Relationship in Sialon Ceramics: Retrospect and Prospect

作　　者：顾辉 

机构地区：[1]上海大学材料科学与工程学院,材料基因组工程研究院,上海200444

出　　处：《无机材料学报》2018年第2期147-152,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金重点项目(51532006)~~

摘　　要：Sialon陶瓷相图和Si3N4陶瓷晶界非晶层是陶瓷学科独立发展后两个具有代表性的基础研究高峰。虽然这两类陶瓷只在成分上体现出细小的差异,并且在实际应用甚至微结构研究时大多将其忽略,但反映出相图与晶界在结构层次、研究思路和方法上的鸿沟。进入本世纪后,本颗题组在发展针对微区成分的分析电镜技术的同时,尝试将Sialon陶瓷的相图和微结构通过掺杂物的分布规律开展协同研究,获得了晶界非晶成分与相关系的多种联系。这为Sialon陶瓷相变机理研究开辟了新的可能,也为陶瓷体系的跨尺度结构-性能关系预测、设计与全周期调控提供了不同的研究思路。Phase diagram in Sialon ceramics and intergranular amorphous films in Si3N4 ceramics, are two successful aspects for fundamental studies in ceramic as an independent discipline. Although differing only in secondary compo- sitions, the small gap in stoichiometry between the two systems divides structure, scale and scope in ceramic research. Started from this century, a series of analytical TEM methodology to probe into local composition within individual grains and even inside grain-boundaries have been developed. This provides the possibility to unify the phase diagram and intergranular structure in Sialon ceramics, especially for them to connect and correlate into a multi-levelled struc- ture framework, which can develop not only an alternative approach to study phase transformation, but also a hierar- chical structure-property relationship that serves the full-life circle of ceramic materials.

关 键 词：SIALON陶瓷 相图 晶界结构 分析电镜 相变 综述 

分 类 号：TQ174[化学工程—陶瓷工业]