Microstructure and mechanical properties of SiC Whisker-reinforced ZrB 2 ultra-high temperature ceramic

Ping Hu; Xing Hong Zhang; Jie Cai Han; Song He Meng; Bao Lin Wang

doi:10.4028/0-87849-473-1.1730

Microstructure and mechanical properties of SiC Whisker-reinforced ZrB ₂ ultra-high temperature ceramic

Ping Hu, Xing Hong Zhang, Jie Cai Han, Song He Meng, Bao Lin Wang

Harbin Institute of Technology

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

5 Citations (Scopus)

Abstract

SiC whisker-reinforced ZrB₂ matrix ultra-high temperature ceramic were prepared at 2000°C for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined. The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa·m^1/2 at room temperature, respectively. Comparing with the SiC particles-reinforced ZrB₂ ceramic, no significant increase in both strength and toughness was observed. The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature. The results suggested that some related parameters such as the lower hot-pressing temperature, a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB₂ composite with high properties.

Original language	English
Pages (from-to)	1730-1732
Number of pages	3
Journal	Key Engineering Materials
Volume	368-372 PART 2
DOIs	https://doi.org/10.4028/0-87849-473-1.1730
Publication status	Published - 2008
Externally published	Yes

Keywords

Mechanical properties
SiC whisker (SiC)
Ultra-high temperature ceramic

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10.4028/0-87849-473-1.1730

Cite this

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title = "Microstructure and mechanical properties of SiC Whisker-reinforced ZrB 2 ultra-high temperature ceramic",

abstract = "SiC whisker-reinforced ZrB2 matrix ultra-high temperature ceramic were prepared at 2000°C for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined. The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa·m1/2 at room temperature, respectively. Comparing with the SiC particles-reinforced ZrB2 ceramic, no significant increase in both strength and toughness was observed. The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature. The results suggested that some related parameters such as the lower hot-pressing temperature, a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB2 composite with high properties.",

keywords = "Mechanical properties, SiC whisker (SiC), Ultra-high temperature ceramic",

author = "Ping Hu and Zhang, {Xing Hong} and Han, {Jie Cai} and Meng, {Song He} and Wang, {Bao Lin}",

year = "2008",

doi = "10.4028/0-87849-473-1.1730",

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T1 - Microstructure and mechanical properties of SiC Whisker-reinforced ZrB 2 ultra-high temperature ceramic

AU - Hu, Ping

AU - Zhang, Xing Hong

AU - Han, Jie Cai

AU - Meng, Song He

AU - Wang, Bao Lin

PY - 2008

Y1 - 2008

N2 - SiC whisker-reinforced ZrB2 matrix ultra-high temperature ceramic were prepared at 2000°C for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined. The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa·m1/2 at room temperature, respectively. Comparing with the SiC particles-reinforced ZrB2 ceramic, no significant increase in both strength and toughness was observed. The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature. The results suggested that some related parameters such as the lower hot-pressing temperature, a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB2 composite with high properties.

AB - SiC whisker-reinforced ZrB2 matrix ultra-high temperature ceramic were prepared at 2000°C for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined. The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa·m1/2 at room temperature, respectively. Comparing with the SiC particles-reinforced ZrB2 ceramic, no significant increase in both strength and toughness was observed. The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature. The results suggested that some related parameters such as the lower hot-pressing temperature, a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB2 composite with high properties.

KW - Mechanical properties

KW - SiC whisker (SiC)

KW - Ultra-high temperature ceramic

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Microstructure and mechanical properties of SiC Whisker-reinforced ZrB ₂ ultra-high temperature ceramic

Abstract

Keywords

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