Microstructures and enhanced mechanical properties of (Al3Ti+Al2O3)/Al–Si composites with co-continuous network structure prepared by pressure infiltration

he, xiangxiang; Lin, Bin; Zhang, Wenxin; Xiao, Huaqiang; Zhang, Weiwen

doi:10.1016/j.ceramint.2022.08.246

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…This condition was also confirmed by tomographic tests with porosity analysis, which was determined at 0.07%. Such results prove that the sintered ceramic skeletons manufactured by the additive technology are characterized by the intended structure of open interconnected pores (high permeability) [5,6].…”

Section: Discussionsupporting

confidence: 55%

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Aluminium Matrix Composite Materials Reinforced by 3D-Printed Ceramic Preforms

et al. 2023

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This article employed the fused deposition modelling (FDM) method and gas-pressure infiltration to manufacture alumina/AlSi12 composites. Porous ceramic skeletons were prepared by FDM 3D printing of two different alumina powder-filed filaments. The organic component was removed using a combination of solvent and heat debinding, and the materials were then sintered at 1500 °C to complete the process. Thermogravimetric tests and DTA analysis were performed to develop an appropriate degradation and sintering program. Manufactured skeletons were subjected to microstructure analysis, porosity analysis, and bending test. The sintering process produced porous alumina ceramic samples with no residual carbon content. Open porosity could occur due to the binder’s degradation. Liquid metal was infiltrated into the ceramic, efficiently filling any open pores and forming a three-dimensional network of the aluminium phase. The microstructure and characteristics of the fabricated materials were investigated using high-resolution scanning electron microscopy, computer tomography, hardness testing, and bending strength testing. The developed composite materials are characterized by the required structure—low porosity and homogenous distribution of the reinforcing phase, better mechanical properties than their matrix and more than twice as high hardness. Hence, the developed innovative technology of their manufacturing can be used in practice.

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Section: Discussionsupporting

confidence: 55%

“…These criteria significantly influence the characteristics of the final product and all products made from it. Many published works address composites infiltrated with liquid aluminium or aluminium alloy reinforced with various particles, e.g., SiC [3,4], TiC [5], Al 3 Ti [6], and Al 2 O 3 [7].…”

Section: Introductionmentioning

confidence: 99%