功能梯度材料表面分形维数的研究  

Study on Surface Fractal Dimension of Functionally Gradient Materials

作　　者：王鲁[1] 李雪利[1] 王富耻[1] 刘国权[2] 

机构地区：[1]北京理工大学,北京100081 [2]北京科技大学,北京100083

出　　处：《材料工程》2001年第11期25-27,共3页Journal of Materials Engineering

摘　　要：研究了等离子喷涂工艺制备的 Zr O2 /Ni Cr Al系功能梯度材料 ,测量了其水平面与垂直面的分形维数。结果表明 ,随着 Ni Cr Al含量的升高 ,分形维数呈曲线变化 ,分形维数与抗弯强度具有较好的对应关系 ;在 Ni Cr Al含量为30 %附近存在渗流区域 ,抗弯强度值出现突变。对该材料的研究 。Fractal dimension(D f) of ZrO 2/NiCrAl functionally gradient materials(FGMs) which was prepared by plasma spraying technology was investigated The results show that D f displays curvilinear variety with NiCrAl content increased, and it can be found there is a good corresponding relation between fraction dimension and bending strength When NiCrAl content is around 30%, there is the percolation phenomena, and the bending strength is obviously increased The studies set up the relationship between fractal dimension and macroscopical properties

关 键 词：功能梯度材料 分形维数 抗弯强度 力学性能 二氧化锆 镍铬铝合金 表面形貌 等离子喷涂 

分 类 号：TB333[一般工业技术—材料科学与工程] TG174.442[金属学及工艺—金属表面处理]