Efficient oscillating micro-grid mixing of CFA-aluminium composite melts

Georgios Kaisarlis; Efstratios Tsolakis; Georgios Vasileiou; Vasileios Spitas; Zhandos Tauanov; Vassilis Inglezakis; Grigorios Itskos; Christos Spitas

doi:10.1016/j.jmatprotec.2017.11.021

Efficient oscillating micro-grid mixing of CFA-aluminium composite melts

Georgios Kaisarlis, Efstratios Tsolakis, Georgios Vasileiou, Vasileios Spitas, Zhandos Tauanov, Vassilis Inglezakis, Grigorios Itskos, Christos Spitas^*

^*Corresponding author for this work

Chemical And Process Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

An analytical, numerical and experimental study is presented on the deagglomeration and dispersion of fine coal fly ash (CFA) reinforcing particles in an A380 aluminium matrix using a piston-actuated oscillating micro-grid mixing method with a specially designed grid geometry. Based on real-time measurement of the piston force, the apparent viscosity of the melt and the effectiveness of the deagglomeration are measured indirectly. The oscillating micro-grid mixing process is shown to be considerably more time-efficient that comparative stir-casting processes currently employed, leading to a two-fold or three-fold reduction in processing time for the same or better mixing quality, or alternatively a nearly two-fold reduction in the standard deviation of the micro-hardness throughout the material.

Original language	English
Pages (from-to)	60-71
Number of pages	12
Journal	Journal of Materials Processing Technology
Volume	254
DOIs	https://doi.org/10.1016/j.jmatprotec.2017.11.021
Publication status	Published - 1 Apr 2018

Funding

This work was supported by the internal fund for research of Nazarbayev University (project NANOCAST, grant No. SOE2016002 ) and the Ministry of Education and Science of Kazakhstan . The authors would also like to thank the thermal power plants of Oskemen and Astana cities for generously providing with CFA samples to carry out the studies.

Keywords

A380 aluminium alloy
coal fly ash
deagglomeration
dispersion
metal matrix composites
oscillating micro-grid mixing

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10.1016/j.jmatprotec.2017.11.021

Cite this

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title = "Efficient oscillating micro-grid mixing of CFA-aluminium composite melts",

abstract = "An analytical, numerical and experimental study is presented on the deagglomeration and dispersion of fine coal fly ash (CFA) reinforcing particles in an A380 aluminium matrix using a piston-actuated oscillating micro-grid mixing method with a specially designed grid geometry. Based on real-time measurement of the piston force, the apparent viscosity of the melt and the effectiveness of the deagglomeration are measured indirectly. The oscillating micro-grid mixing process is shown to be considerably more time-efficient that comparative stir-casting processes currently employed, leading to a two-fold or three-fold reduction in processing time for the same or better mixing quality, or alternatively a nearly two-fold reduction in the standard deviation of the micro-hardness throughout the material.",

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AU - Kaisarlis, Georgios

AU - Tsolakis, Efstratios

AU - Vasileiou, Georgios

AU - Spitas, Vasileios

AU - Tauanov, Zhandos

AU - Inglezakis, Vassilis

AU - Itskos, Grigorios

AU - Spitas, Christos

PY - 2018/4/1

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N2 - An analytical, numerical and experimental study is presented on the deagglomeration and dispersion of fine coal fly ash (CFA) reinforcing particles in an A380 aluminium matrix using a piston-actuated oscillating micro-grid mixing method with a specially designed grid geometry. Based on real-time measurement of the piston force, the apparent viscosity of the melt and the effectiveness of the deagglomeration are measured indirectly. The oscillating micro-grid mixing process is shown to be considerably more time-efficient that comparative stir-casting processes currently employed, leading to a two-fold or three-fold reduction in processing time for the same or better mixing quality, or alternatively a nearly two-fold reduction in the standard deviation of the micro-hardness throughout the material.

AB - An analytical, numerical and experimental study is presented on the deagglomeration and dispersion of fine coal fly ash (CFA) reinforcing particles in an A380 aluminium matrix using a piston-actuated oscillating micro-grid mixing method with a specially designed grid geometry. Based on real-time measurement of the piston force, the apparent viscosity of the melt and the effectiveness of the deagglomeration are measured indirectly. The oscillating micro-grid mixing process is shown to be considerably more time-efficient that comparative stir-casting processes currently employed, leading to a two-fold or three-fold reduction in processing time for the same or better mixing quality, or alternatively a nearly two-fold reduction in the standard deviation of the micro-hardness throughout the material.

KW - A380 aluminium alloy

KW - coal fly ash

KW - deagglomeration

KW - dispersion

KW - metal matrix composites

KW - oscillating micro-grid mixing

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DO - 10.1016/j.jmatprotec.2017.11.021

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SP - 60

EP - 71

JO - Journal of Materials Processing Technology

JF - Journal of Materials Processing Technology

ER -

Efficient oscillating micro-grid mixing of CFA-aluminium composite melts

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