Processing and mechanical properties of zirconium diboride-based ceramics prepared by spark plasma sintering

Hailong Wang; Chang An Wang; Xuefeng Yao; Daining Fang

doi:10.1111/j.1551-2916.2007.01665.x

Processing and mechanical properties of zirconium diboride-based ceramics prepared by spark plasma sintering

Hailong Wang, Chang An Wang^*, Xuefeng Yao, Daining Fang

^*Corresponding author for this work

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

122 Citations (Scopus)

Abstract

Zirconium diboride (ZrB2) reinforced by nano-SiC whiskers has been prepared by spark plasma sintering (SPS). Of most interest is the densification of ZrB2-SiCw composites accomplished by SPS at a temperature as low as 1550°C. The relative density of ZrB2-SiCw composites could reach to 97% with an average grain size of 2-3 μm. Both flexural strength and fracture toughness of the composites were improved with increasing amount of SiCw. Flexural strengths ranged from 416 MPa for monolithic ZrB2 to over 545 MPa for ZrB2-15 vol% SiCw composites. Similarly, fracture toughness also increased from 5.46 MPa·m1/2 to more than 6.81 MPa·m1/2 in the same composition range. The relative density of ZrB2-SiCw composites could be further improved to near 100% by adding some sintering aids such as AlN and Si3N4; however, the effects of different sintering additives on the mechanical properties of the composites were different.

Original language	English
Pages (from-to)	1992-1997
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	90
Issue number	7
DOIs	https://doi.org/10.1111/j.1551-2916.2007.01665.x
Publication status	Published - Jul 2007
Externally published	Yes

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title = "Processing and mechanical properties of zirconium diboride-based ceramics prepared by spark plasma sintering",

abstract = "Zirconium diboride (ZrB2) reinforced by nano-SiC whiskers has been prepared by spark plasma sintering (SPS). Of most interest is the densification of ZrB2-SiCw composites accomplished by SPS at a temperature as low as 1550°C. The relative density of ZrB2-SiCw composites could reach to 97% with an average grain size of 2-3 μm. Both flexural strength and fracture toughness of the composites were improved with increasing amount of SiCw. Flexural strengths ranged from 416 MPa for monolithic ZrB2 to over 545 MPa for ZrB2-15 vol% SiCw composites. Similarly, fracture toughness also increased from 5.46 MPa·m1/2 to more than 6.81 MPa·m1/2 in the same composition range. The relative density of ZrB2-SiCw composites could be further improved to near 100% by adding some sintering aids such as AlN and Si3N4; however, the effects of different sintering additives on the mechanical properties of the composites were different.",

author = "Hailong Wang and Wang, {Chang An} and Xuefeng Yao and Daining Fang",

year = "2007",

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doi = "10.1111/j.1551-2916.2007.01665.x",

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AU - Wang, Hailong

AU - Wang, Chang An

AU - Yao, Xuefeng

AU - Fang, Daining

PY - 2007/7

Y1 - 2007/7

N2 - Zirconium diboride (ZrB2) reinforced by nano-SiC whiskers has been prepared by spark plasma sintering (SPS). Of most interest is the densification of ZrB2-SiCw composites accomplished by SPS at a temperature as low as 1550°C. The relative density of ZrB2-SiCw composites could reach to 97% with an average grain size of 2-3 μm. Both flexural strength and fracture toughness of the composites were improved with increasing amount of SiCw. Flexural strengths ranged from 416 MPa for monolithic ZrB2 to over 545 MPa for ZrB2-15 vol% SiCw composites. Similarly, fracture toughness also increased from 5.46 MPa·m1/2 to more than 6.81 MPa·m1/2 in the same composition range. The relative density of ZrB2-SiCw composites could be further improved to near 100% by adding some sintering aids such as AlN and Si3N4; however, the effects of different sintering additives on the mechanical properties of the composites were different.

AB - Zirconium diboride (ZrB2) reinforced by nano-SiC whiskers has been prepared by spark plasma sintering (SPS). Of most interest is the densification of ZrB2-SiCw composites accomplished by SPS at a temperature as low as 1550°C. The relative density of ZrB2-SiCw composites could reach to 97% with an average grain size of 2-3 μm. Both flexural strength and fracture toughness of the composites were improved with increasing amount of SiCw. Flexural strengths ranged from 416 MPa for monolithic ZrB2 to over 545 MPa for ZrB2-15 vol% SiCw composites. Similarly, fracture toughness also increased from 5.46 MPa·m1/2 to more than 6.81 MPa·m1/2 in the same composition range. The relative density of ZrB2-SiCw composites could be further improved to near 100% by adding some sintering aids such as AlN and Si3N4; however, the effects of different sintering additives on the mechanical properties of the composites were different.

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

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ER -

Processing and mechanical properties of zirconium diboride-based ceramics prepared by spark plasma sintering

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