Densification, microstructure evolution and mechanical properties of WC doped HfB2-SiC ceramics

Ji Xuan Liu; Guo Jun Zhang; Fang Fang Xu; Wen Wen Wu; Hai Tao Liu; Yoshio Sakka; Toshiyuki Nishimura; Tohru S. Suzuki; De Wei Ni; Ji Zou

doi:10.1016/j.jeurceramsoc.2015.04.009

Densification, microstructure evolution and mechanical properties of WC doped HfB₂-SiC ceramics

Ji Xuan Liu, Guo Jun Zhang^*, Fang Fang Xu, Wen Wen Wu, Hai Tao Liu, Yoshio Sakka, Toshiyuki Nishimura, Tohru S. Suzuki, De Wei Ni, Ji Zou

^*Corresponding author for this work

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

31 Citations (Scopus)

Abstract

Despite of good oxidation resistance and ablation resistance, challenge to densify and tendency to loss high temperature (H.T.) strength have limited its potential applications in aerospace for HfB₂-SiC ceramic. In this work, dense HfB₂-SiC ceramic with improved H.T. flexural strength was prepared using WC as sintering aid. Pure HfB₂-SiC ceramic exhibited creep deformation at 1600°C with measured strength value of 389±82MPa, whereas WC doped sample showed much higher flexural strength of 658±69MPa with linear elastic behavior prior to fracture. In addition to clean grain boundary, the addition of 5vol.%WC into HfB₂-SiC ceramic promoted the formation of fine (Hf,W)B₂, (Hf,W)C and WB precipitates. This combinative effect is responsible for its excellent H.T. mechanical property of WC doped HfB₂-SiC ceramic.

Original language	English
Pages (from-to)	2707-2714
Number of pages	8
Journal	Journal of the European Ceramic Society
Volume	35
Issue number	10
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2015.04.009
Publication status	Published - 2015 Sept 1
Externally published	Yes

Keywords

Ceramic
Hafnium diboride
High-temperature properties
Sintering
UHTCs

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2015.04.009

Cite this

@article{f8268a6838614231a73ee1a0eb34fe7e,

title = "Densification, microstructure evolution and mechanical properties of WC doped HfB2-SiC ceramics",

abstract = "Despite of good oxidation resistance and ablation resistance, challenge to densify and tendency to loss high temperature (H.T.) strength have limited its potential applications in aerospace for HfB2-SiC ceramic. In this work, dense HfB2-SiC ceramic with improved H.T. flexural strength was prepared using WC as sintering aid. Pure HfB2-SiC ceramic exhibited creep deformation at 1600°C with measured strength value of 389±82MPa, whereas WC doped sample showed much higher flexural strength of 658±69MPa with linear elastic behavior prior to fracture. In addition to clean grain boundary, the addition of 5vol.%WC into HfB2-SiC ceramic promoted the formation of fine (Hf,W)B2, (Hf,W)C and WB precipitates. This combinative effect is responsible for its excellent H.T. mechanical property of WC doped HfB2-SiC ceramic.",

keywords = "Ceramic, Hafnium diboride, High-temperature properties, Sintering, UHTCs",

author = "Liu, {Ji Xuan} and Zhang, {Guo Jun} and Xu, {Fang Fang} and Wu, {Wen Wen} and Liu, {Hai Tao} and Yoshio Sakka and Toshiyuki Nishimura and Suzuki, {Tohru S.} and Ni, {De Wei} and Ji Zou",

note = "Funding Information: Financial supports from the National Natural Science Foundation of China (No. 51272266 ), the Science and Technology Commission of Shanghai (No. 15ZR1445200 ) and the State Key Laboratory of High Performance Ceramics and Superfine Microstructure are gratefully acknowledged. Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

year = "2015",

month = sep,

day = "1",

doi = "10.1016/j.jeurceramsoc.2015.04.009",

language = "English",

volume = "35",

pages = "2707--2714",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Densification, microstructure evolution and mechanical properties of WC doped HfB2-SiC ceramics

AU - Liu, Ji Xuan

AU - Zhang, Guo Jun

AU - Xu, Fang Fang

AU - Wu, Wen Wen

AU - Liu, Hai Tao

AU - Sakka, Yoshio

AU - Nishimura, Toshiyuki

AU - Suzuki, Tohru S.

AU - Ni, De Wei

AU - Zou, Ji

N1 - Funding Information: Financial supports from the National Natural Science Foundation of China (No. 51272266 ), the Science and Technology Commission of Shanghai (No. 15ZR1445200 ) and the State Key Laboratory of High Performance Ceramics and Superfine Microstructure are gratefully acknowledged. Publisher Copyright: © 2015 Elsevier Ltd. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Despite of good oxidation resistance and ablation resistance, challenge to densify and tendency to loss high temperature (H.T.) strength have limited its potential applications in aerospace for HfB2-SiC ceramic. In this work, dense HfB2-SiC ceramic with improved H.T. flexural strength was prepared using WC as sintering aid. Pure HfB2-SiC ceramic exhibited creep deformation at 1600°C with measured strength value of 389±82MPa, whereas WC doped sample showed much higher flexural strength of 658±69MPa with linear elastic behavior prior to fracture. In addition to clean grain boundary, the addition of 5vol.%WC into HfB2-SiC ceramic promoted the formation of fine (Hf,W)B2, (Hf,W)C and WB precipitates. This combinative effect is responsible for its excellent H.T. mechanical property of WC doped HfB2-SiC ceramic.

AB - Despite of good oxidation resistance and ablation resistance, challenge to densify and tendency to loss high temperature (H.T.) strength have limited its potential applications in aerospace for HfB2-SiC ceramic. In this work, dense HfB2-SiC ceramic with improved H.T. flexural strength was prepared using WC as sintering aid. Pure HfB2-SiC ceramic exhibited creep deformation at 1600°C with measured strength value of 389±82MPa, whereas WC doped sample showed much higher flexural strength of 658±69MPa with linear elastic behavior prior to fracture. In addition to clean grain boundary, the addition of 5vol.%WC into HfB2-SiC ceramic promoted the formation of fine (Hf,W)B2, (Hf,W)C and WB precipitates. This combinative effect is responsible for its excellent H.T. mechanical property of WC doped HfB2-SiC ceramic.

KW - Ceramic

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KW - Sintering

KW - UHTCs

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