(武漢理工大學(xué) 材料復(fù)合新技術(shù)國家重點(diǎn)實(shí)驗(yàn)室， 武漢 430070)
摘 要: 從異相顆粒共沉降的角度出發(fā)，通過理論分析影響顆粒堆積體內(nèi)組分分布的沉降各要素之間的關(guān)系，確立了粉末的粒度分布同沉積層組分之間的定量關(guān)系式，在此基礎(chǔ)上，建立了用共沉降法制備梯度材料的數(shù)學(xué)模型。通過沉降實(shí)驗(yàn)和熱壓燒結(jié)技術(shù)，制備出了組分連續(xù)變化的Ti-Mo系梯度材料。將實(shí)驗(yàn)測(cè)試結(jié)果同模型的計(jì)算結(jié)果相比較，表明建立起的數(shù)學(xué)模型能很好地預(yù)測(cè)材料中的組分分布。
關(guān)鍵字: 共沉降；制備；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
