钛基梯度功能材料的复合结构研究进展  

Progress in Titanium Matrix Functionally Gradient Materials Complex Structure

作　　者：李永[1] 宋健[2] 张志民[3] 

机构地区：[1]北京理工大学,北京100081 [2]清华大学,北京100084 [3]北京航空航天大学,北京100083

出　　处：《稀有金属材料与工程》2005年第2期178-183,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(50175057);航空基础科学基金资助项目(98B51027)

摘　　要：介绍了钛基梯度功能材料复合结构的概念和开发背景,回顾了近些年来在钛基梯度功能材料宏细观尺度研究方面所取得的研究成果,并对钛基梯度功能材料复合结构的发展趋势作一展望。由于这种材料中,各组分材料的体积含量在空间位置上是连续变化的,其物理性能没有突变,因而可较好地避免诸如在纤维增强复合材料中经常出现的层间应力问题或降低应力集中现象。梯度功能材料目前已被发展用来作高温环境下的结构用件,本文着重论述了钛基梯度功能材料复合结构在材料优化分析领域的研究现状及其应用前景,并提出需要进一步研究的方向。The concept and the development background of titanium matrix functionally gradient materials (FGM) complex structure are introduced. The macro-meso-scopic scale of research results of FGM are reviewed and the development trends in the area are prospected. By gradually varying the volume fraction of the constituent materials, their material properties exhibit a smooth and continuous change with iespect to the spatial location, thus being void of interface problems that are usually associated with fiber-reinforced composites and with less severe thermal stress concentrations. FGMs are now developed for general use as structural components in extremely high temperature environments. The current status of research and the application prospects for materials optimization analysis of FGM complex structure are especially discussed. Future research needs are highlighted.

关 键 词：钛基梯度功能材料 宏细观尺度 复合结构 梯度指标 

分 类 号：TB34[一般工业技术—材料科学与工程]