超薄多孔钛板的分形表征  

Fractal characterization of ultra-thin porous Ti plate

作　　者：李程[1,2] 汤慧萍[1,2] 朱纪磊[2] 敖庆波[2] 支浩[2] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出　　处：《金属热处理》2011年第10期15-18,共4页Heat Treatment of Metals

基　　金：国家"973"计划项目(2006CB601200)

摘　　要：采用4种不同粒径范围的氢化脱氢钛粉末作为原料,采用松装烧结法成功制备出孔隙率为43.9%～46.1%、厚度为0.25 mm超薄多孔钛板。采用分形理论对多孔钛板SEM照片的孔隙面积进行分析,研究了孔隙分形维数与不同粒径制备的多孔钛板力学性能和微电阻性能之间的关系。结果表明,不同粒度范围粉末制备的烧结多孔钛板均表现出明显的分形特征,其孔隙分形维数值为1～2,且各分形维数相关系数高达99%以上。随着粉末粒度的降低,样品的分形维数及其相关系数也随之提高。随着分形维数的增加,多孔钛板的抗拉强度和微电阻也随之增加。Ultra-thin porous Ti plates of 43.0%-46.1% in porosity and 0.25 mm in thickness were fabricated successfully by hydrogenation-dehydrogenation Ti powder with four different size ranges and the method of loose sintering.Porosity area of SEM photo of porous Ti plate was analyzed by using fractal theory.The relationships between pore space fractal dimension and mechanical and micro resistance properties of porous Ti plate were researched.The results show that remarkable fractal characterization is expressed in sintered porous Ti plate made by four different size ranges powder,the fractal dimension ranges from 1 to 2,and the related coefficients of all fractal dimension reach more than 99%.With the decrease of powder size,the fractal dimension and its related coefficients are increased,and with the increase of the fractal dimension,the tensile strength and micro resistance of porous Ti plate are increased.

关 键 词：超薄多孔钛板 分形表征 分形维数 物理性能 

分 类 号：TG113[金属学及工艺—物理冶金]