硅酸盐学报2009，Vol.37Issue(2)：291-294,4.
热处理对层状SiC/Si复合材料结构和性能的影响
EFFECT OF HEAT TREATMENT ON THE MICROSTRUCTURE AND PHYSICAL PROPERTIES OF SiC/Si LAMINATED COMPOSITES
摘要
Abstract
Carbon templates were prepared by kraft papers impregnated with phenol resin,and after laminated,drying and carbonization,packed with silicon powder and heated to 1400℃ in N2 atmosphere.They were heated to 1550℃ in vacuum for 60 min,and the subsequent reaction resulted in a laminar SiC/Si composire with a density of 2.20 g/cm3 and strength of 435 Mpa.The laminated SiC/Si composites were retreated under nitrogen atmosphere and vaoaum separately at a temperature of 1400℃ for 30 min.The results show that during retreatmem in N2 atmosphere,with the diffusion of Si and C,more SiC formed,and the density and bending strength of the retreated composite increase to 2.32g/cm3 and 455MPa,respectively.The density and bending strength of the retreated composite in vacuum are 2.21g/cm3 and 430 Mpa,respectively.This is because,in addition to the diflusion and reaction of silicon and carbon,the Si evaporation in vacuum can cause a loss of mass,and the open porosity increases distinctively,so the density and bending strength of the composite decrease slightly.关键词
热处理工艺/显微组织/物理性能Key words
heat treatment,microstructure,physical properties分类
矿业与冶金引用本文复制引用
杨刚宾,刘银娟,乔冠军,王红洁..热处理对层状SiC/Si复合材料结构和性能的影响[J].硅酸盐学报,2009,37(2):291-294,4.基金项目
国家自然科学基金(50572084)资助项目. （50572084）
