Investigation on densification and microstructure of Al-TiO2 composite produced by Spark plasma sintering

Samuel Ranti Oke; Oluwasegun Eso Falodun; Mphahlele R. Mahlatse; Oladeji Oluremi Ige; Peter Apata Olubambi

doi:10.1016/j.matpr.2019.07.194

Investigation on densification and microstructure of Al-TiO² composite produced by Spark plasma sintering

Samuel Ranti Oke, Oluwasegun Eso Falodun, Mphahlele R. Mahlatse, Oladeji Oluremi Ige, Peter Apata Olubambi

Metallurgy

Research output: Contribution to journal › Conference article › peer-review

7 Citations (Scopus)

Abstract

Aluminium (Al) reinforced with 5 vol% Ti and TiO² particles ranging from 5 to 20 vol% was fabricated with spark plasma sintering process. Al, Ti and TiO² starting powders were blended using a high energy ball without balls for 6 h at a rotating speed was 150 rpm. The mixed powders were sintered at 550 oC using SPS in vacuum. The sintering data was obtained during SPS and was used to analyse the densification behaviour. The morphology of the mixed and sintered Al composite was examined using SEM. The composite density and hardness were also evaluated. The results showed that both the pure Al and composites exhibited similar displacement and shrinkage trends with two shrinkage peaks and slight variation in displacement and shrinkage heights. There was no reaction between the Al and Ti during sintering but the SPS have a decomposition effect on the 5 vol% Ti due to possible reaction with the TiO². The microstructure revealed agglomerates of TiO² particles. The hardness of the Al composite increased with TiO² addition.

Original language	English
Pages (from-to)	3182-3188
Number of pages	7
Journal	Materials Today: Proceedings
Volume	18
DOIs	https://doi.org/10.1016/j.matpr.2019.07.194
Publication status	Published - 2019
Event	9th International Conference of Materials Processing and Characterization, ICMPC 2019 - Hyderabad, Andhra Pradesh, India Duration: 8 Mar 2019 → 10 Mar 2019

Keywords

Aluminium
Composite
Densification
Microstructure
Spark Plasma Sintering (SPS)

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1016/j.matpr.2019.07.194

Cite this

@article{76572529033845fc9f454d43b059d1b8,

title = "Investigation on densification and microstructure of Al-TiO2 composite produced by Spark plasma sintering",

abstract = "Aluminium (Al) reinforced with 5 vol% Ti and TiO2 particles ranging from 5 to 20 vol% was fabricated with spark plasma sintering process. Al, Ti and TiO2 starting powders were blended using a high energy ball without balls for 6 h at a rotating speed was 150 rpm. The mixed powders were sintered at 550 oC using SPS in vacuum. The sintering data was obtained during SPS and was used to analyse the densification behaviour. The morphology of the mixed and sintered Al composite was examined using SEM. The composite density and hardness were also evaluated. The results showed that both the pure Al and composites exhibited similar displacement and shrinkage trends with two shrinkage peaks and slight variation in displacement and shrinkage heights. There was no reaction between the Al and Ti during sintering but the SPS have a decomposition effect on the 5 vol% Ti due to possible reaction with the TiO2. The microstructure revealed agglomerates of TiO2 particles. The hardness of the Al composite increased with TiO2 addition.",

keywords = "Aluminium, Composite, Densification, Microstructure, Spark Plasma Sintering (SPS)",

author = "Oke, {Samuel Ranti} and Falodun, {Oluwasegun Eso} and Mahlatse, {Mphahlele R.} and Ige, {Oladeji Oluremi} and Olubambi, {Peter Apata}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd.; 9th International Conference of Materials Processing and Characterization, ICMPC 2019 ; Conference date: 08-03-2019 Through 10-03-2019",

year = "2019",

doi = "10.1016/j.matpr.2019.07.194",

language = "English",

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journal = "Materials Today: Proceedings",

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TY - JOUR

T1 - Investigation on densification and microstructure of Al-TiO2 composite produced by Spark plasma sintering

AU - Oke, Samuel Ranti

AU - Falodun, Oluwasegun Eso

AU - Mahlatse, Mphahlele R.

AU - Ige, Oladeji Oluremi

AU - Olubambi, Peter Apata

PY - 2019

Y1 - 2019

N2 - Aluminium (Al) reinforced with 5 vol% Ti and TiO2 particles ranging from 5 to 20 vol% was fabricated with spark plasma sintering process. Al, Ti and TiO2 starting powders were blended using a high energy ball without balls for 6 h at a rotating speed was 150 rpm. The mixed powders were sintered at 550 oC using SPS in vacuum. The sintering data was obtained during SPS and was used to analyse the densification behaviour. The morphology of the mixed and sintered Al composite was examined using SEM. The composite density and hardness were also evaluated. The results showed that both the pure Al and composites exhibited similar displacement and shrinkage trends with two shrinkage peaks and slight variation in displacement and shrinkage heights. There was no reaction between the Al and Ti during sintering but the SPS have a decomposition effect on the 5 vol% Ti due to possible reaction with the TiO2. The microstructure revealed agglomerates of TiO2 particles. The hardness of the Al composite increased with TiO2 addition.

AB - Aluminium (Al) reinforced with 5 vol% Ti and TiO2 particles ranging from 5 to 20 vol% was fabricated with spark plasma sintering process. Al, Ti and TiO2 starting powders were blended using a high energy ball without balls for 6 h at a rotating speed was 150 rpm. The mixed powders were sintered at 550 oC using SPS in vacuum. The sintering data was obtained during SPS and was used to analyse the densification behaviour. The morphology of the mixed and sintered Al composite was examined using SEM. The composite density and hardness were also evaluated. The results showed that both the pure Al and composites exhibited similar displacement and shrinkage trends with two shrinkage peaks and slight variation in displacement and shrinkage heights. There was no reaction between the Al and Ti during sintering but the SPS have a decomposition effect on the 5 vol% Ti due to possible reaction with the TiO2. The microstructure revealed agglomerates of TiO2 particles. The hardness of the Al composite increased with TiO2 addition.

KW - Aluminium

KW - Composite

KW - Densification

KW - Microstructure

KW - Spark Plasma Sintering (SPS)

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