自蔓延高温合成/快速加压法制备(TiB_2+Fe)/Fe梯度材料  

FABRICATION OF (TiB_2+Fe)/Fe FUNCTIONALLY GRADED MATERIAL BY SELF PROPAGATING HIGH TEMPERATURE SYNTHESIS-QUICK PRESSURE TECHNIQUE

作　　者：刘建平[1] 傅正义[1] 王皓[1] 张金咏[1] 张清杰[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《硅酸盐学报》2002年第4期438-442,共5页Journal of The Chinese Ceramic Society

基　　金：国家杰出青年科学基金资助项目 (5 992 5 2 0 7)~~

摘　　要：通过对不同Fe含量的Ti+B +Fe体系绝热温度计算和试样温度有限元计算 ,确定了 (TiB2 +Fe) /Fe梯度材料各层合理的厚度 ,并采用SHS/QP技术制备了 (TiB2 +Fe) /Fe梯度材料。电子探针分析表明 (TiB2 +Fe) /Fe梯度试样中各层间没有了明显的界面 ,沿厚度方向由富陶瓷相向富金属相连续转变。背散射电子像分析表明从富陶瓷侧到富金属侧 ,材料的显微结构也是梯度变化的。SEM分析表明 ,从富陶瓷层到富金属层 ,TiB2 晶粒减小。The reasonable thickness was determined by the adiabatic temperature calculation of Ti+B+Fe system and the finite element calculation of the temperature in the samples for different layers of (TiB2+Fe) functionally graded material (FGM) composites. The (TiB2+Fe)/Fe FGM composites were fabricated by the self propagating high temperature synthesis-quick pressure SHS/QP method. But when the mass fraction of Fe reaches 80%, a little of TiB2 can be formed in the composite. EPMA analyses show that the composition of FGM products changes gradually across the samples without a distinct interface between the different layers. Back-scattered electron images show that the microstructure of the composites also changed gradually. The size of TiB2 grains decreases gradually from the region rich in TiB2 to the region rich in Fe as showed by SEM.

关 键 词：自蔓延高温合成/快速加压法 制备 (TiB2+Fe)/Fe梯度材料 二硼化钛 铁 

分 类 号：TB383[一般工业技术—材料科学与工程]