(武汉理工大学 材料复合新技术国家重点实验室， 武汉 430070)
摘 要: 从异相颗粒共沉降的角度出发，通过理论分析影响颗粒堆积体内组分分布的沉降各要素之间的关系，确立了粉末的粒度分布同沉积层组分之间的定量关系式，在此基础上，建立了用共沉降法制备梯度材料的数学模型。通过沉降实验和热压烧结技术，制备出了组分连续变化的Ti-Mo系梯度材料。将实验测试结果同模型的计算结果相比较，表明建立起的数学模型能很好地预测材料中的组分分布。
关键字: 共沉降；制备；梯度材料
graded material with smoothly
varying composition
（State Key Laboratory of Advanced Technology for Materials Synthesis and
Processing, Wuhan University of Technology, Wuhan 430070, China）
Abstract:From the idea of the co-sedimentation of different kinds of particles, the relationships among the factors influencing the component distribution in particle sediment we re theoretically analyzed. On the basis of the quantitative relation between the particle size distributions of raw materials and the component distribution of particle sediment, a mathematical mo del on preparation of functionally graded material (FGM) was established. Through sedimentation experiment and hot-press sintering Ti-Mo FGM with smoothly varying composition was fabricated. Comparing the results calculated by the model with ones measured from energy spectrum instrument shows that the model could approximately predict the compositional distribution of FGM.'
Key words: co-sedimentation；fabrication；functionally graded material
