High fracture toughness of HfC through nano-scale templating and novel sintering aids

Wei Hao; Na Ni; Fangwei Guo; Fangcheng Cao; Juan Jiang; Xiaofeng Zhao; Ping Xiao

doi:10.1111/jace.15956

High fracture toughness of HfC through nano-scale templating and novel sintering aids

Wei Hao, Na Ni^*, Fangwei Guo, Fangcheng Cao, Juan Jiang, Xiaofeng Zhao, Ping Xiao

^*Corresponding author for this work

Materials Engineering

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

463 Downloads (Pure)

Abstract

An approach to improve the sintering ability and the fracture toughness of hafnium carbide (HfC) ceramic by designing a unique composite structure is reported. The uniform and ultra-fine HfC nanoparticles (~300 nm) are synthesized at 1450°C by vacuum carbonization reaction with the glucose-derived hydrothermal precursor as a carbon source and template. HfC ceramic sintered with a SiCN sintering aid of 15 vol. % possesses a beneficial three-dimensional network microstructure composed of inter-penetrating phases of carbon, SiC and HfC with varied stoichiometry at multi-length scales. The obtained HfC exhibits a higher fracture toughness of 5.5 MPa m^1/2, which can be attributed to the unique composite structure able to promote stress releases in the crack tip and enhance the resistance to crack propagation.

Original language	English
Pages (from-to)	997-1009
Number of pages	13
Journal	Journal of the American Ceramic Society
Volume	102
Issue number	3
Early online date	21 Jul 2018
DOIs	https://doi.org/10.1111/jace.15956
Publication status	Published - 1 Mar 2019

Keywords

carbides
composites
nanoparticles
spark plasma sintering
toughness

Research Beacons, Institutes and Platforms

Dalton Nuclear Institute

Access to Document

10.1111/jace.15956

Accepted Manuscript-JACES-Hao WeiAccepted author manuscript, 1.66 MB

Cite this

@article{ad24339d439c41028456e036698db24b,

title = "High fracture toughness of HfC through nano-scale templating and novel sintering aids",

abstract = "An approach to improve the sintering ability and the fracture toughness of hafnium carbide (HfC) ceramic by designing a unique composite structure is reported. The uniform and ultra-fine HfC nanoparticles (~300 nm) are synthesized at 1450°C by vacuum carbonization reaction with the glucose-derived hydrothermal precursor as a carbon source and template. HfC ceramic sintered with a SiCN sintering aid of 15 vol. % possesses a beneficial three-dimensional network microstructure composed of inter-penetrating phases of carbon, SiC and HfC with varied stoichiometry at multi-length scales. The obtained HfC exhibits a higher fracture toughness of 5.5 MPa m1/2, which can be attributed to the unique composite structure able to promote stress releases in the crack tip and enhance the resistance to crack propagation.",

keywords = "carbides, composites, nanoparticles, spark plasma sintering, toughness",

author = "Wei Hao and Na Ni and Fangwei Guo and Fangcheng Cao and Juan Jiang and Xiaofeng Zhao and Ping Xiao",

year = "2019",

month = mar,

day = "1",

doi = "10.1111/jace.15956",

language = "English",

volume = "102",

pages = "997--1009",

journal = "Journal of the American Ceramic Society",

issn = "0002-7820",

publisher = "John Wiley & Sons Ltd",

number = "3",

}

TY - JOUR

T1 - High fracture toughness of HfC through nano-scale templating and novel sintering aids

AU - Hao, Wei

AU - Ni, Na

AU - Guo, Fangwei

AU - Cao, Fangcheng

AU - Jiang, Juan

AU - Zhao, Xiaofeng

AU - Xiao, Ping

PY - 2019/3/1

Y1 - 2019/3/1

N2 - An approach to improve the sintering ability and the fracture toughness of hafnium carbide (HfC) ceramic by designing a unique composite structure is reported. The uniform and ultra-fine HfC nanoparticles (~300 nm) are synthesized at 1450°C by vacuum carbonization reaction with the glucose-derived hydrothermal precursor as a carbon source and template. HfC ceramic sintered with a SiCN sintering aid of 15 vol. % possesses a beneficial three-dimensional network microstructure composed of inter-penetrating phases of carbon, SiC and HfC with varied stoichiometry at multi-length scales. The obtained HfC exhibits a higher fracture toughness of 5.5 MPa m1/2, which can be attributed to the unique composite structure able to promote stress releases in the crack tip and enhance the resistance to crack propagation.

AB - An approach to improve the sintering ability and the fracture toughness of hafnium carbide (HfC) ceramic by designing a unique composite structure is reported. The uniform and ultra-fine HfC nanoparticles (~300 nm) are synthesized at 1450°C by vacuum carbonization reaction with the glucose-derived hydrothermal precursor as a carbon source and template. HfC ceramic sintered with a SiCN sintering aid of 15 vol. % possesses a beneficial three-dimensional network microstructure composed of inter-penetrating phases of carbon, SiC and HfC with varied stoichiometry at multi-length scales. The obtained HfC exhibits a higher fracture toughness of 5.5 MPa m1/2, which can be attributed to the unique composite structure able to promote stress releases in the crack tip and enhance the resistance to crack propagation.

KW - carbides

KW - composites

KW - nanoparticles

KW - spark plasma sintering

KW - toughness

UR - http://www.scopus.com/inward/record.url?scp=85059535517&partnerID=8YFLogxK

U2 - 10.1111/jace.15956

DO - 10.1111/jace.15956

M3 - Article

AN - SCOPUS:85059535517

SN - 0002-7820

VL - 102

SP - 997

EP - 1009

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 3

ER -

High fracture toughness of HfC through nano-scale templating and novel sintering aids

Abstract

Keywords

Research Beacons, Institutes and Platforms

Access to Document

Other files and links

Fingerprint

Cite this