Development of a single-phase Ca-α-SiAlON ceramic from nanosized precursors using spark plasma sintering

Raja Muhammad Awais Khan; Moath Mohammad Al Malki; Abbas Saeed Hakeem; Muhammad Ali Ehsan; Tahar Laoui

doi:10.1016/j.msea.2016.07.075

Development of a single-phase Ca-α-SiAlON ceramic from nanosized precursors using spark plasma sintering

Raja Muhammad Awais Khan, Moath Mohammad Al Malki, Abbas Saeed Hakeem^*, Muhammad Ali Ehsan, Tahar Laoui

^*Corresponding author for this work

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

22 Scopus citations

Abstract

Nitrogen-rich Ca-α-SiAlON ceramics were synthesized using nanosized precursors via spark plasma sintering process for various holding times (10, 20, 30 min) at relatively low temperatures of 1500 °C and 1600 °C. The effects of the experimental conditions, namely sintering time and temperature, on the densification and mechanical properties of the processed α-SiAlON were investigated. All of the conditions yielded nearly completely densified ceramics. A remarkable combination of hardness and toughness was obtained for the samples at either sintering temperature; and these values were greatest after 30 min sintering time, with Vickers hardness values of 21.6 GPa and 20.5 GPa and fracture toughness values of 7.3 MPa√m and 9.7 MPa√m for sintering temperatures of 1500 °C and 1600 °C, respectively. The differences in the mechanical properties of these samples were related to differences in the phases formed during the sintering process.

Original language	English
Pages (from-to)	243-249
Number of pages	7
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	673
DOIs	https://doi.org/10.1016/j.msea.2016.07.075
State	Published - 15 Sep 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

Mechanical properties
Nano-ceramics
SiAlON
Silicon nitride
Spark plasma sintering

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Development of a single-phase Ca-α-SiAlON ceramic from nanosized precursors using spark plasma sintering",

abstract = "Nitrogen-rich Ca-α-SiAlON ceramics were synthesized using nanosized precursors via spark plasma sintering process for various holding times (10, 20, 30 min) at relatively low temperatures of 1500 °C and 1600 °C. The effects of the experimental conditions, namely sintering time and temperature, on the densification and mechanical properties of the processed α-SiAlON were investigated. All of the conditions yielded nearly completely densified ceramics. A remarkable combination of hardness and toughness was obtained for the samples at either sintering temperature; and these values were greatest after 30 min sintering time, with Vickers hardness values of 21.6 GPa and 20.5 GPa and fracture toughness values of 7.3 MPa√m and 9.7 MPa√m for sintering temperatures of 1500 °C and 1600 °C, respectively. The differences in the mechanical properties of these samples were related to differences in the phases formed during the sintering process.",

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author = "Khan, {Raja Muhammad Awais} and {Al Malki}, {Moath Mohammad} and Hakeem, {Abbas Saeed} and Ehsan, {Muhammad Ali} and Tahar Laoui",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = sep,

day = "15",

doi = "10.1016/j.msea.2016.07.075",

language = "English",

volume = "673",

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journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

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Development of a single-phase Ca-α-SiAlON ceramic from nanosized precursors using spark plasma sintering. / Khan, Raja Muhammad Awais; Al Malki, Moath Mohammad; Hakeem, Abbas Saeed et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 673, 15.09.2016, p. 243-249.

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

TY - JOUR

T1 - Development of a single-phase Ca-α-SiAlON ceramic from nanosized precursors using spark plasma sintering

AU - Khan, Raja Muhammad Awais

AU - Al Malki, Moath Mohammad

AU - Hakeem, Abbas Saeed

AU - Ehsan, Muhammad Ali

AU - Laoui, Tahar

PY - 2016/9/15

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N2 - Nitrogen-rich Ca-α-SiAlON ceramics were synthesized using nanosized precursors via spark plasma sintering process for various holding times (10, 20, 30 min) at relatively low temperatures of 1500 °C and 1600 °C. The effects of the experimental conditions, namely sintering time and temperature, on the densification and mechanical properties of the processed α-SiAlON were investigated. All of the conditions yielded nearly completely densified ceramics. A remarkable combination of hardness and toughness was obtained for the samples at either sintering temperature; and these values were greatest after 30 min sintering time, with Vickers hardness values of 21.6 GPa and 20.5 GPa and fracture toughness values of 7.3 MPa√m and 9.7 MPa√m for sintering temperatures of 1500 °C and 1600 °C, respectively. The differences in the mechanical properties of these samples were related to differences in the phases formed during the sintering process.

AB - Nitrogen-rich Ca-α-SiAlON ceramics were synthesized using nanosized precursors via spark plasma sintering process for various holding times (10, 20, 30 min) at relatively low temperatures of 1500 °C and 1600 °C. The effects of the experimental conditions, namely sintering time and temperature, on the densification and mechanical properties of the processed α-SiAlON were investigated. All of the conditions yielded nearly completely densified ceramics. A remarkable combination of hardness and toughness was obtained for the samples at either sintering temperature; and these values were greatest after 30 min sintering time, with Vickers hardness values of 21.6 GPa and 20.5 GPa and fracture toughness values of 7.3 MPa√m and 9.7 MPa√m for sintering temperatures of 1500 °C and 1600 °C, respectively. The differences in the mechanical properties of these samples were related to differences in the phases formed during the sintering process.

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KW - Nano-ceramics

KW - SiAlON

KW - Silicon nitride

KW - Spark plasma sintering

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Development of a single-phase Ca-α-SiAlON ceramic from nanosized precursors using spark plasma sintering

Abstract

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Keywords

ASJC Scopus subject areas

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