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Evaluation of Whisker Alignment in Axisymmetric SiC w ‐Reinforced Al 2 O 3 Composite Material
Author(s) -
Park HyoungJoon,
Kim HyounEe,
Kim DohYeon
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb04511.x
Subject(s) - whisker , whiskers , materials science , planar , composite material , rotational symmetry , composite number , gaussian , cross section (physics) , geometry , mathematics , physics , computer graphics (images) , quantum mechanics , computer science
A quantitative method to evaluate the degree of whisker alignment in axisymmetric composite materials was developed. The angular distribution of the whiskers was analyzed by measuring the aspect ratios of the whiskers observed on a planar section. However, due to the large difference in the probability of whiskers being detected on the planar section (depending on whisker length and degree of alignment), the angular distribution of the whiskers observed on the planar section was significantly different from the actual distributions of the whiskers in three dimensions. Three‐dimensional angular distributions were evaluated by comparing the aspect ratios observed on the planar section with those calculated under the assumption that the whisker angle fell in a Gaussian distribution with average angle of 90°. By this method, the degree of preferential alignment is expressed as the standard deviation of the Gaussian distribution. This quantification of whisker alignment is useful in analyzing the mechanical behaviors of composite materials reinforced with elongated particles.