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

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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.

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Authors and Affiliations

  1. Centro de Investigación y de Estudios Avanzados del IPN Unidad Saltillo, Parque Industrial Saltillo-Ramos Arizpe, Ave. Industria Metalúrgica No. 1062, 25900, Ramos Arizpe, Coahuila, México

    Amin Bahrami, Martin I. Pech-Canul, Carlos A. Gutiérrez & Niloofar Soltani

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  1. Amin Bahrami
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  2. Martin I. Pech-Canul
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  3. Carlos A. Gutiérrez
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  4. Niloofar Soltani
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Correspondence to Amin Bahrami.

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Bahrami, A., Pech-Canul, M.I., Gutiérrez, C.A. et al. Microstructure and properties of bilayer-graded Al-matrix composites by one-step pressureless infiltration of B4C/rice-husk ash preforms. MRS Online Proceedings Library 1820, 68 (2016). https://doi.org/10.1557/opl.2016.68

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