Effect of TiB2 on Pressureless Sintering and Hot Pressing of ZrB2

Carolyne Oliveira Davi; Miriam K.H. Yassuda; Rosa Maria Rocha

doi:10.4028/www.scientific.net/MSF.881.97

Paper Titles

Processing of Aqueous Tape Casting of Glass-Ceramic in the SiO₂-Al₂O₃-MgO-Li₂O System with ZrO₂and B₂O₃ Addition
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Devitrification in SiO₂-B₂O₃-Al₂O₃-La₂O₃-TiO₂ Glass during the Infiltration of Ceramic Composite
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Crystallization Kinetics of β-Spodumene/Cordierite-Based Glass-Ceramics
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Development of α-Al₂O₃ Ceramics for Bottom of Sintering Impeller Furnace
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Effect of TiB₂ on Pressureless Sintering and Hot Pressing of ZrB₂
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Thermal Shock Resistance of Liquid Phase Sintered SiC
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The Influence of Microstructure, Temperature and Sintering Level on Electric Properties of Electrical Insulators Obtained from Raw Materials of Rio Grande do Norte - Brazil
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Effect of CuO-TiO₂ Eutectic on Thermal and Electrical Conductivities of CaCu₃Ti₄O₁₂ Ceramics
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Synthesis and Characterization of Nickel Manganite Ceramics by Polymeric Precursors Method
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HomeMaterials Science ForumMaterials Science Forum Vol. 881Effect of TiB2 on Pressureless Sintering and Hot...

Effect of TiB₂ on Pressureless Sintering and Hot Pressing of ZrB₂

Abstract:

Zirconium diboride (ZrB₂) is a material of particular interest because of the excellent and unique property combination of high melting point and high electrical and thermal conductivity. In this work, the effect of TiB₂ addition on pressureless sintering and hot pressing sintering of ZrB₂ was investigated. Four compositions were prepared with 0, 5, 10 and 20 wt% of TiB₂. First, ZrB₂ and TiB₂ powders were milled by planetary mill with SiC spheres at for 4 h and then they were wet mixed. Compacted samples were pressureless sintered at 2150 oC/1h and hot pressed at 1850 °C/30min with 20 MPa, both in Ar atmosphere. The added TiB₂ completely dissolved into the structure and formed a solid solution with ZrB₂. Addition of TiB₂ in ZrB₂ ceramic improved densification and hardness for both sintering process, but hot pressed samples exhibited better results.

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Periodical:

Materials Science Forum (Volume 881)

Pages:

97-102

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.881.97

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Online since:

November 2016

Authors:

Carolyne Oliveira Davi*, Miriam K.H. Yassuda, Rosa Maria Rocha

Keywords:

Hot Pressing, Pressureless Sintering, TiB₂, Ultra-High Temperature Ceramics, ZrB₂

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