Ultrafast high‐temperature sintering of ZrB2

Ultrafast high‐temperature sintering (UHS) is a joule heating method with an extremely high heating rate (∼103–104°C/min). In this work, commercial ZrB2 powders were rapidly densified by UHS to >90% relative density within 60 s in vacuum without pressure. Bulk density improved from 75% to 93% of...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2024-01, Vol.107 (1), p.11-15
Main Authors: Mondal, Santanu, Juan Diego Shiraishi Lombard, Gollapudi, Sreenivasulu, Tallon, Carolina, Jie‐Fang Li, Viehland, Dwight
Format: Article
Language:English
Subjects:
Bulk density
Grain size
Heating rate
Ohmic dissipation
Refractory materials
Resistance heating
Sintering (powder metallurgy)
Specific gravity
Zirconium compounds
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Summary:Ultrafast high‐temperature sintering (UHS) is a joule heating method with an extremely high heating rate (∼103–104°C/min). In this work, commercial ZrB2 powders were rapidly densified by UHS to >90% relative density within 60 s in vacuum without pressure. Bulk density improved from 75% to 93% of relative density by increasing the sintering duration from 10 to 60 s. The final grain size increases from 2.7 ± 1.1 to 19.0 ± 8.4 μm when the sintering time increased from 10 to 60 s. X‐ray diffraction and energy‐dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.19445