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烧结金属中孔隙排列的定量表征 在研究烧结材料孔隙率及其性能之间的关系时,只凭孔隙的体积分数或孔形等参数,往往不足以作出详尽的说明。在大多数情况下,还必须特别考虑到孔隙的排列。本文的主要内容是用相关函数来表征孔隙排列。先后对具相同孔径及在颗粒角点或原始颗粒间具较大孔径的六角晶网结构的理想孔之排列进行模拟,以此对成对相关函数、加权成对相关函数及标志相关函数的不同结论进行分析。用成对相关函数可量化择优孔间距,而择优孔间距则表示了孔结构内一定的有序度。如再采用一个加权数(如孔面积),则可通过加权成对相关函数和标志相关函数了解在某孔径内优先出现的间距。以烧结铁为例,进行了真实结构孔隙排列的研究,以进行比较。因具特征裂缝结构,只能有条件地用成对相关函数来分析差别。有迹象
Quantitative Characterization of Pore Arrangement in Sintered Metals In studying the relationship between the porosity and the properties of sintered materials, it is often not sufficient to specify parameters such as pore volume fraction or pore shape only. In most cases, the arrangement of pores must also be taken into account in particular. The main content of this paper is to use the correlation function to characterize the pore arrangement. Successive pairs of correlation functions, weighted pairwise correlation functions, and logotype correlation functions were simulated for the arrangement of ideal holes for a hexagonal network structure with the same aperture and with larger apertures between the corner points of the particles or the original particles Conclusions for analysis. The paired correlation function can be used to quantify the spacing of preferred holes, while the spacing of preferential holes represents a certain degree of order within the hole structure. If we then use a weighted number (such as hole area), through the weighted pairwise correlation function and the marker correlation function to understand the first appearing within a certain aperture aperture. Take the sintered iron as an example, the real structure of pore arrangement research, for comparison. Due to the characteristic crack structure, the pairwise correlation function can only conditionally analyze the difference. There are signs