A parametric description of yak tibia’s multilevel microporous

Through untold centuries of evolutionary development,a function bioceramic,yak tibia,has become a highly optimized structure suited to a variety of demanding duties. In this study,the cross-section’s porous morphology of yak tibia was observed by SEM. The image processing for higher gray-scale resolution was used to identify the porosity and other structure characteristics. By a MATLAB program the porous number was counted as 524,and the porosity defined as the ratio of porous pixel area to cross-section area was computed as 0.063. It was found that the porous radius varies along with level rank and the curve weakens near to zero. A 9th-order polynomial expression was fitted from the varying curve of porous radius along with number,which characterizes the multilevel microporous distribution of yak tibia.