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Microstructure and properties of bilayer-graded Al-matrix composites by one-step pressureless infiltration of B4C/rice-husk ash preforms

Published online by Cambridge University Press:  04 July 2016

Amin Bahrami ,
Martin I. Pech-Canul ,
Carlos A. Gutiérrez  and
Niloofar Soltani
Amin Bahrami*
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN Unidad Saltillo, Ave. Industria Metalúrgica No. 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe, Coahuila, México, 25900.
Martin I. Pech-Canul*
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN Unidad Saltillo, Ave. Industria Metalúrgica No. 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe, Coahuila, México, 25900.
Carlos A. Gutiérrez
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN Unidad Saltillo, Ave. Industria Metalúrgica No. 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe, Coahuila, México, 25900.
Niloofar Soltani
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN Unidad Saltillo, Ave. Industria Metalúrgica No. 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe, Coahuila, México, 25900.
*
1aEmail to: [email protected]
1bEmail to: [email protected]
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Abstract

The quantitative effect of the following parameters on the one single step pressureless infiltration characteristics of bilayer B4Cp/rice-husk ash (RHA) porous preforms by aluminum alloys was investigated using the Taguchi method and analysis of variance (ANOVA): infiltration temperature and time, B4C particle size, RHA percentage, percentage porosity in the preforms, and magnesium content in the alloy. The contributions of each of the parameters to the retained porosity, hardness and modulus of elasticity of the resulting bilayer composites were determined. The parameters that most significantly impact the modulus of elasticity (E) of the resulting composites are chemical composition of Al alloy followed by porosity of preforms and B4C particle size. Their relative contributions to the variance in the values of modulus of elasticity are 25.7, 22.48 and 18.44 %, respectively. Verification tests conducted using the established optimum parameters show a good agreement with those of projected values.

Keywords

InfiltrationCompositeMicrostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1820: Symposium 6D – Innovative production and application of structural and functional ceramic- and metal-matrix composites , 2016 , imrc2015s6d-0011
Copyright
Copyright © Materials Research Society 2016 

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