Effects of ZrB2 contents on the mechanical properties and thermal shock resistance of B4C-ZrB2 ceramics

Rujie He; Li Jing; Zhaoliang Qu; Zhili Zhou; Shigang Ai; Wei Kai

doi:10.1016/j.matdes.2015.01.002

Effects of ZrB₂ contents on the mechanical properties and thermal shock resistance of B₄C-ZrB₂ ceramics

Rujie He
, Li Jing
, Zhaoliang Qu
, Zhili Zhou
, Shigang Ai^*
, Wei Kai

^*Corresponding author for this work

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

41 Citations (Scopus)

Abstract

B₄C-ZrB₂ ceramics with different ZrB₂ contents were fabricated using hot-pressing technique. The introduction of ZrB₂ greatly promotes the sintering process, and all B₄C-ZrB₂ samples achieve full densification. With the ZrB₂ content increasing from 10 to 40vol.%, the Vickers hardness ranges from 28.8 to 34.6GPa, the flexure strength ranges from 233.3 to 523.4MPa, and the fracture toughness ranges from 6.0 to 7.0MPam^1/2, respectively. The thermal shock properties of B₄C-ZrB₂ ceramics were also investigated using water quenching method. The critical thermal shock temperature difference (δT_c) for B₄C-10vol.% ZrB₂, B₄C-20vol.% ZrB₂, B₄C-30vol.% ZrB₂ and B₄C-40vol.% ZrB₂ ceramics are 293.5, 337.5, 365.4 and 373.5°C, respectively. Considering the ceramic should maintain a relatively high initial strength, B₄C-30vol.% ZrB₂ is found to exhibit the optimal thermal shock behavior.

Original language	English
Pages (from-to)	56-61
Number of pages	6
Journal	Materials and Design
Volume	71
DOIs	https://doi.org/10.1016/j.matdes.2015.01.002
Publication status	Published - 15 Apr 2015
Externally published	Yes

Keywords

Carbide boride
Ceramics
Mechanical properties
Microstructure
Thermal shock resistance

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10.1016/j.matdes.2015.01.002

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@article{5154af85f94c4f7b898887e95ad1211f,

title = "Effects of ZrB2 contents on the mechanical properties and thermal shock resistance of B4C-ZrB2 ceramics",

abstract = "B4C-ZrB2 ceramics with different ZrB2 contents were fabricated using hot-pressing technique. The introduction of ZrB2 greatly promotes the sintering process, and all B4C-ZrB2 samples achieve full densification. With the ZrB2 content increasing from 10 to 40vol.\%, the Vickers hardness ranges from 28.8 to 34.6GPa, the flexure strength ranges from 233.3 to 523.4MPa, and the fracture toughness ranges from 6.0 to 7.0MPam1/2, respectively. The thermal shock properties of B4C-ZrB2 ceramics were also investigated using water quenching method. The critical thermal shock temperature difference (δTc) for B4C-10vol.\% ZrB2, B4C-20vol.\% ZrB2, B4C-30vol.\% ZrB2 and B4C-40vol.\% ZrB2 ceramics are 293.5, 337.5, 365.4 and 373.5°C, respectively. Considering the ceramic should maintain a relatively high initial strength, B4C-30vol.\% ZrB2 is found to exhibit the optimal thermal shock behavior.",

keywords = "Carbide boride, Ceramics, Mechanical properties, Microstructure, Thermal shock resistance",

author = "Rujie He and Li Jing and Zhaoliang Qu and Zhili Zhou and Shigang Ai and Wei Kai",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

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doi = "10.1016/j.matdes.2015.01.002",

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T1 - Effects of ZrB2 contents on the mechanical properties and thermal shock resistance of B4C-ZrB2 ceramics

AU - He, Rujie

AU - Jing, Li

AU - Qu, Zhaoliang

AU - Zhou, Zhili

AU - Ai, Shigang

AU - Kai, Wei

PY - 2015/4/15

Y1 - 2015/4/15

N2 - B4C-ZrB2 ceramics with different ZrB2 contents were fabricated using hot-pressing technique. The introduction of ZrB2 greatly promotes the sintering process, and all B4C-ZrB2 samples achieve full densification. With the ZrB2 content increasing from 10 to 40vol.%, the Vickers hardness ranges from 28.8 to 34.6GPa, the flexure strength ranges from 233.3 to 523.4MPa, and the fracture toughness ranges from 6.0 to 7.0MPam1/2, respectively. The thermal shock properties of B4C-ZrB2 ceramics were also investigated using water quenching method. The critical thermal shock temperature difference (δTc) for B4C-10vol.% ZrB2, B4C-20vol.% ZrB2, B4C-30vol.% ZrB2 and B4C-40vol.% ZrB2 ceramics are 293.5, 337.5, 365.4 and 373.5°C, respectively. Considering the ceramic should maintain a relatively high initial strength, B4C-30vol.% ZrB2 is found to exhibit the optimal thermal shock behavior.

AB - B4C-ZrB2 ceramics with different ZrB2 contents were fabricated using hot-pressing technique. The introduction of ZrB2 greatly promotes the sintering process, and all B4C-ZrB2 samples achieve full densification. With the ZrB2 content increasing from 10 to 40vol.%, the Vickers hardness ranges from 28.8 to 34.6GPa, the flexure strength ranges from 233.3 to 523.4MPa, and the fracture toughness ranges from 6.0 to 7.0MPam1/2, respectively. The thermal shock properties of B4C-ZrB2 ceramics were also investigated using water quenching method. The critical thermal shock temperature difference (δTc) for B4C-10vol.% ZrB2, B4C-20vol.% ZrB2, B4C-30vol.% ZrB2 and B4C-40vol.% ZrB2 ceramics are 293.5, 337.5, 365.4 and 373.5°C, respectively. Considering the ceramic should maintain a relatively high initial strength, B4C-30vol.% ZrB2 is found to exhibit the optimal thermal shock behavior.

KW - Carbide boride

KW - Ceramics

KW - Mechanical properties

KW - Microstructure

KW - Thermal shock resistance

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DO - 10.1016/j.matdes.2015.01.002

M3 - Article

AN - SCOPUS:84923238566

SN - 0264-1275

VL - 71

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EP - 61

JO - Materials and Design

JF - Materials and Design

ER -

Effects of ZrB₂ contents on the mechanical properties and thermal shock resistance of B₄C-ZrB₂ ceramics

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