Microstructure and high-temperature strength of textured and non-textured ZrB2 ceramics

Wen Wen Wu; Yoshio Sakka; Mehdi Estili; Tohru S. Suzuki; Toshiyuki Nishimura; Guo Jun Zhang

doi:10.1088/1468-6996/15/1/014202

Microstructure and high-temperature strength of textured and non-textured ZrB₂ ceramics

Wen Wen Wu, Yoshio Sakka, Mehdi Estili, Tohru S. Suzuki, Toshiyuki Nishimura, Guo Jun Zhang

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

44 Citations (Scopus)

Abstract

Zirconium diboride (ZrB₂) ceramic possesses a unique combination of nice mechanical performance, high melting point (> 3000 °C) and great high-temperature oxidation resistance (up to 1600 °C), which makes it a promising material system for ever-increasing ultra-high temperature (UHT) applications. However, ZrB2 suffers from poor mechanical performance at UHTs, which could strongly limit its applications at UHT. Here, we successfully demonstrate that texturing is an effective strategy to greatly enhance the flexural strength of monolithic ZrB₂, reaching a high value of 810 ± 60 MPa at 1600 °C when loaded in c-axis direction. We thoroughly discuss the strengthening mechanism by in-depth microstructural observations and analysis. Our discovery has technological and scientific implications for other UHT ceramic systems, especially those using ZrB₂ as a matrix.

Original language	English
Article number	014202
Journal	Science and Technology of Advanced Materials
Volume	15
Issue number	1
DOIs	https://doi.org/10.1088/1468-6996/15/1/014202
Publication status	Published - 2014 Feb
Externally published	Yes

Keywords

ZrB
high-temperature flexural strength
microstructure texture

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.1088/1468-6996/15/1/014202

Cite this

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title = "Microstructure and high-temperature strength of textured and non-textured ZrB2 ceramics",

abstract = "Zirconium diboride (ZrB2) ceramic possesses a unique combination of nice mechanical performance, high melting point (> 3000 °C) and great high-temperature oxidation resistance (up to 1600 °C), which makes it a promising material system for ever-increasing ultra-high temperature (UHT) applications. However, ZrB2 suffers from poor mechanical performance at UHTs, which could strongly limit its applications at UHT. Here, we successfully demonstrate that texturing is an effective strategy to greatly enhance the flexural strength of monolithic ZrB2, reaching a high value of 810 ± 60 MPa at 1600 °C when loaded in c-axis direction. We thoroughly discuss the strengthening mechanism by in-depth microstructural observations and analysis. Our discovery has technological and scientific implications for other UHT ceramic systems, especially those using ZrB2 as a matrix.",

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AU - Sakka, Yoshio

AU - Estili, Mehdi

AU - Suzuki, Tohru S.

AU - Nishimura, Toshiyuki

AU - Zhang, Guo Jun

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