Synthesis of hard and tough calcium stabilized α-sialon/SiC ceramic composites using nano-sized precursors and spark plasma sintering

Raja Muhammad Awais Khan; Bilal Anjum Ahmed; Moath Mohammad Al Malki; Abbas Saeed Hakeem; Tahar Laoui

doi:10.1016/j.jallcom.2018.05.062

Synthesis of hard and tough calcium stabilized α-sialon/SiC ceramic composites using nano-sized precursors and spark plasma sintering

Raja Muhammad Awais Khan, Bilal Anjum Ahmed, Moath Mohammad Al Malki, Abbas Saeed Hakeem, Tahar Laoui^*

^*Corresponding author for this work

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

19 Scopus citations

Abstract

Silicon carbide (SiC)-reinforced calcium (Ca)-α-sialon ceramic composites were synthesized using nano-sized precursors and spark plasma sintering at 1500 °C for 30 min by adding 10, 20 and 30 wt % of SiC particles into the sialon matrix. Almost complete densification was achieved for all processed samples. The second-phase SiC particles were found to be homogeneously dispersed in the α-sialon matrix. The effect of the amount of loaded SiC on the mechanical properties of the ceramic composites was studied. A remarkable combination of hardness and toughness values, specifically 24.53 GPa (HV₁₀) and 11.0 MPa m^1/2, respectively, was obtained for the composite ceramic containing 30 wt% SiC, whereas hardness and fracture toughness values of only 21.1 GPa (HV₁₀) and 7.3 MPa m^1/2, respectively, were obtained for the monolithic α-sialon ceramic. The increase in fracture toughness was fairly attributed to the crack deflection, crack bridging and grain pullout mechanisms caused by the finely dispersed SiC particles.

Original language	English
Pages (from-to)	200-208
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	757
DOIs	https://doi.org/10.1016/j.jallcom.2018.05.062
State	Published - 15 Aug 2018

Bibliographical note

Funding Information:
The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals ( KFUPM ) for funding this work through project No. 12-ADV2411-04 as part of the National Science, Technology and Innovation Plan.

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Ca-sialon
Mechanical properties
Nano-ceramics
Silicon carbide
Spark plasma sintering

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2018.05.062

Cite this

@article{b4fef3ab254f42029bdd70c8df04cbd4,

title = "Synthesis of hard and tough calcium stabilized α-sialon/SiC ceramic composites using nano-sized precursors and spark plasma sintering",

abstract = "Silicon carbide (SiC)-reinforced calcium (Ca)-α-sialon ceramic composites were synthesized using nano-sized precursors and spark plasma sintering at 1500 °C for 30 min by adding 10, 20 and 30 wt % of SiC particles into the sialon matrix. Almost complete densification was achieved for all processed samples. The second-phase SiC particles were found to be homogeneously dispersed in the α-sialon matrix. The effect of the amount of loaded SiC on the mechanical properties of the ceramic composites was studied. A remarkable combination of hardness and toughness values, specifically 24.53 GPa (HV10) and 11.0 MPa m1/2, respectively, was obtained for the composite ceramic containing 30 wt% SiC, whereas hardness and fracture toughness values of only 21.1 GPa (HV10) and 7.3 MPa m1/2, respectively, were obtained for the monolithic α-sialon ceramic. The increase in fracture toughness was fairly attributed to the crack deflection, crack bridging and grain pullout mechanisms caused by the finely dispersed SiC particles.",

keywords = "Ca-sialon, Mechanical properties, Nano-ceramics, Silicon carbide, Spark plasma sintering",

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

note = "Funding Information: The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals ( KFUPM ) for funding this work through project No. 12-ADV2411-04 as part of the National Science, Technology and Innovation Plan. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = aug,

day = "15",

doi = "10.1016/j.jallcom.2018.05.062",

language = "English",

volume = "757",

pages = "200--208",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

}

TY - JOUR

T1 - Synthesis of hard and tough calcium stabilized α-sialon/SiC ceramic composites using nano-sized precursors and spark plasma sintering

AU - Khan, Raja Muhammad Awais

AU - Ahmed, Bilal Anjum

AU - Al Malki, Moath Mohammad

AU - Hakeem, Abbas Saeed

AU - Laoui, Tahar

N1 - Funding Information: The authors would like to acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals ( KFUPM ) for funding this work through project No. 12-ADV2411-04 as part of the National Science, Technology and Innovation Plan. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2018/8/15

Y1 - 2018/8/15

N2 - Silicon carbide (SiC)-reinforced calcium (Ca)-α-sialon ceramic composites were synthesized using nano-sized precursors and spark plasma sintering at 1500 °C for 30 min by adding 10, 20 and 30 wt % of SiC particles into the sialon matrix. Almost complete densification was achieved for all processed samples. The second-phase SiC particles were found to be homogeneously dispersed in the α-sialon matrix. The effect of the amount of loaded SiC on the mechanical properties of the ceramic composites was studied. A remarkable combination of hardness and toughness values, specifically 24.53 GPa (HV10) and 11.0 MPa m1/2, respectively, was obtained for the composite ceramic containing 30 wt% SiC, whereas hardness and fracture toughness values of only 21.1 GPa (HV10) and 7.3 MPa m1/2, respectively, were obtained for the monolithic α-sialon ceramic. The increase in fracture toughness was fairly attributed to the crack deflection, crack bridging and grain pullout mechanisms caused by the finely dispersed SiC particles.

AB - Silicon carbide (SiC)-reinforced calcium (Ca)-α-sialon ceramic composites were synthesized using nano-sized precursors and spark plasma sintering at 1500 °C for 30 min by adding 10, 20 and 30 wt % of SiC particles into the sialon matrix. Almost complete densification was achieved for all processed samples. The second-phase SiC particles were found to be homogeneously dispersed in the α-sialon matrix. The effect of the amount of loaded SiC on the mechanical properties of the ceramic composites was studied. A remarkable combination of hardness and toughness values, specifically 24.53 GPa (HV10) and 11.0 MPa m1/2, respectively, was obtained for the composite ceramic containing 30 wt% SiC, whereas hardness and fracture toughness values of only 21.1 GPa (HV10) and 7.3 MPa m1/2, respectively, were obtained for the monolithic α-sialon ceramic. The increase in fracture toughness was fairly attributed to the crack deflection, crack bridging and grain pullout mechanisms caused by the finely dispersed SiC particles.

KW - Ca-sialon

KW - Mechanical properties

KW - Nano-ceramics

KW - Silicon carbide

KW - Spark plasma sintering

UR - http://www.scopus.com/inward/record.url?scp=85047020460&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2018.05.062

DO - 10.1016/j.jallcom.2018.05.062

M3 - Article

AN - SCOPUS:85047020460

SN - 0925-8388

VL - 757

SP - 200

EP - 208

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Synthesis of hard and tough calcium stabilized α-sialon/SiC ceramic composites using nano-sized precursors and spark plasma sintering

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this