Pressureless Sintering of ZrB2 with β-SiC Addition

Mariah Oliveira Juliani; Carolyne Davi Oliveria; Rosa Maria Rocha

doi:10.4028/www.scientific.net/MSF.820.250

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HomeMaterials Science ForumMaterials Science Forum Vol. 820Pressureless Sintering of ZrB2 with β-SiC Addition

Pressureless Sintering of ZrB₂ with β-SiC Addition

Abstract:

Zirconium diboride (ZrB₂) is a covalent compound that leads the category of ultra high temperature ceramics materials owing to its unique properties. In this work, the effect of addition of beta-silicon carbide (β-SiC) in pressureless sintering of ZrB₂ was investigated. Four compositions were prepared with 0, 10, 20 e 30 vol% of SiC. ZrB₂ powder and mixtures were prepared in by planetary milling with SiC spheres at 4 h. Two sintering temperatures were used, one at 2050 oC/1h and other at 2150 °C/1h. The addition of SiC has promoted an increasing in densification with the increasing of SiC content. The total densification of sample sintered at 2050 oC was 90% of theoretical density for sample with 30 vol% of SiC, while the maximum densification for temperature of 2150 oC was 91,0 %TD.

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Materials Science Forum (Volume 820)

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250-255

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https://doi.org/10.4028/www.scientific.net/MSF.820.250

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Online since:

June 2015

Authors:

Mariah Oliveira Juliani*, Carolyne Davi Oliveria, Rosa Maria Rocha

Keywords:

Sintering, UHTC, Ultra High Temperature Ceramics, ZrB₂, β-SiC

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