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Scanning Force Microscopy Study of Ceramic Fibers for Advanced Composites
Author(s) -
Wang HsinFu
Publication year - 1996
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.1151-2916.1996.tb08981.x
Subject(s) - materials science , composite material , scanning electron microscope , ceramic , coating , surface roughness , fiber , surface finish , refractory metals , metallurgy
The surface roughness and topography of three different Al 2 O 3 fibers were evaluated using atomic force microscopy (AFM). The fibers used were as‐received, refractory‐metal coated, and Y 2 O 3 /refractory‐metal duplex‐layer coated. The refractory‐metal coating and Y 2 O 3 coating on the Al 2 O 3 fibers increased the average surface roughness from 13.3 to 17.1 and 18.8 nm, respectively. The topographic image of the fibers evaluated by AFM was compared to that obtained by scanning electron microscopy. Lateral force microscopy (LFM) was used to measure the distribution of the friction force on the refractory‐metal‐coated Al 2 O 3 surfaces, with friction coefficients ranging from 0.2 to 0.8; the average friction coefficient was 0.38. Tailoring the mechanical properties at fiber/matrix interfaces by surface modification of Al 2 O 3 fibers to improve the overall mechanical properties of the composites also was proposed.