反应烧结制备Si_3N_4-BN复合材料性能的研究  

Properties of Si_3N_4-BN composites prepared by reaction sintering

作　　者：于建宾[1] 钱凡[1] 刘国齐[1] 马天飞[1] 杨文刚[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《耐火材料》2014年第1期26-28,共3页Refractories

基　　金：国家科技支撑计划(2011BAE12B02);2012年河南省基础研究项目(122300410002)

摘　　要：以粒度≤45μm、w(Si)>98%的Si粉,粒度≤5μm、w(BN)=99%的h-BN,粒度≤45μm、w(Si3N4)=95%的Si3N4粉为原料,采用等静压成型,氮化反应烧结工艺制备了Si3N4-BN复合材料,研究了Si粉添加量(w)分别为15%、30%、45%时对材料常温性能、高温性能及抗钢液侵蚀性的影响。结果表明:随Si粉添加量的增加,Si3N4-BN复合材料常温强度及高温强度增加,但Si粉添加量(w)为45%时,Si3N4-BN复合试样内存在少量的残Si;Si3N4-BN复合材料具有较低的热膨胀系数及优异的抗钢液侵蚀性能。Si3N4-BN composites were prepared by isostatic pressing shaping and reaction sintering using Si powder （ ≤45 μm and Si 〉98% in mass,the same hereinafter） ,h-BN powder （ ≤5 μm and BN 99%） and Si3N4 powder （ ≤45 μm and Si3N4 95% ） as starting materials. The cold and hot properties,corrosion resistance to molten steel of the composites were investigated with 15 % ,30%, and 45 % Si powder, respectively. The results show that cold strength and hot strength of the Si3N4-BN composites are improved with Si powder addition increasing;Si3N4-BN composite has a small amount of residual Si when Si powder addition is 45% ;Si3N4-BN composite has low thermal expansion coefficient and excellent corrosion resistance to molten steel.

关 键 词：Si3N4-BN 反应烧结 抗侵蚀性 

分 类 号：TQ175[化学工程—硅酸盐工业]