The effects of binders and heating temperatures on the properties of preforms |
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Authors: | J- M Chiou B- Y Wei C- M Chen |
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Affiliation: | (1) Materials Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan |
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Abstract: | The use of binders in fabricating ceramic fiber preforms is essential when producing metal-matrix com-posites via squeeze
casting or liquid metal infiltration. The binder is not only used to stabilize the shape of the preform, but also to increase
its strength. A strong preform is needed to make a net shape or near-net shape casting so that many post-machining processes
can be reduced or eliminated. However, very lit-tle attention has been paid to preform fabrication, subsequent processing,
and its characterization. This work focuses on the relation between preform processing (selection of binder, heat treatment
of the pre-form, etc.) and the properties of the resulting preforms. Silica and phosphate binders were used to make short
alumina fiber preforms. The use of binders and the heat treatments used were correlated to the properties of the resulting
preforms. The results showed that the heat treating temperature, as well as the amount of binder, is relevant to the resulting
properties of the preform. Correlations among the use of binders, heat treatment condition, composition of the binders, and
the properties of the preforms were investigated. |
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Keywords: | alumina fiber compressive strength heat treatment metal matrix composite phosphate binder preform silica binder |
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