Strengthened interfacial bonding and its effects on fracture mode of TaC ceramics with addition of B

Limeng Liu; Jozef Vleugels; Shuigen Huang; Jie Wei; Yujin Wang

doi:10.1016/j.jeurceramsoc.2019.12.013

Strengthened interfacial bonding and its effects on fracture mode of TaC ceramics with addition of B

Limeng Liu^*
, Jozef Vleugels
, Shuigen Huang
, Jie Wei
, Yujin Wang

^*Corresponding author for this work

North Minzu University
KU Leuven
Harbin Institute of Technology

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

15 Scopus citations

Abstract

TaC ceramics with 0-0.237 wt% B addition were prepared by hot pressing. The effect of B addition on the phase constitution, interfacial chemistry/bonding and mechanical properties of the TaC ceramics were investigated. Upon B addition, the elimination of O impurity and segregation of B at grain boundaries were evidenced, accompanied by an increase in bonding strength of the TaC grains, to result in a fracture mode change from intergranular to transgranular and a reduced fracture toughness. Addition of excessive B resulted in the formation of TaB₂ and C within TaC ceramics. Further, TaC-TaB₂-SiC composites were prepared by Si addition. Coherent bonding between TaB₂ and TaC was preserved in the TaC-TaB₂-SiC composites, and residual stresses due to thermal expansion mismatch of the different phases increased flexural strength and fracture toughness of the composites.

Original language	English
Pages (from-to)	1067-1077
Number of pages	11
Journal	Journal of the European Ceramic Society
Volume	40
Issue number	4
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2019.12.013
State	Published - Apr 2020
Externally published	Yes

Keywords

Fracture toughness
Grain boundary
Microstructure
Tantalum carbide

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10.1016/j.jeurceramsoc.2019.12.013

Cite this

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title = "Strengthened interfacial bonding and its effects on fracture mode of TaC ceramics with addition of B",

abstract = "TaC ceramics with 0-0.237 wt\% B addition were prepared by hot pressing. The effect of B addition on the phase constitution, interfacial chemistry/bonding and mechanical properties of the TaC ceramics were investigated. Upon B addition, the elimination of O impurity and segregation of B at grain boundaries were evidenced, accompanied by an increase in bonding strength of the TaC grains, to result in a fracture mode change from intergranular to transgranular and a reduced fracture toughness. Addition of excessive B resulted in the formation of TaB2 and C within TaC ceramics. Further, TaC-TaB2-SiC composites were prepared by Si addition. Coherent bonding between TaB2 and TaC was preserved in the TaC-TaB2-SiC composites, and residual stresses due to thermal expansion mismatch of the different phases increased flexural strength and fracture toughness of the composites.",

keywords = "Fracture toughness, Grain boundary, Microstructure, Tantalum carbide",

author = "Limeng Liu and Jozef Vleugels and Shuigen Huang and Jie Wei and Yujin Wang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = apr,

doi = "10.1016/j.jeurceramsoc.2019.12.013",

language = "英语",

volume = "40",

pages = "1067--1077",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier B.V.",

number = "4",

}

TY - JOUR

T1 - Strengthened interfacial bonding and its effects on fracture mode of TaC ceramics with addition of B

AU - Liu, Limeng

AU - Vleugels, Jozef

AU - Huang, Shuigen

AU - Wei, Jie

AU - Wang, Yujin

PY - 2020/4

Y1 - 2020/4

N2 - TaC ceramics with 0-0.237 wt% B addition were prepared by hot pressing. The effect of B addition on the phase constitution, interfacial chemistry/bonding and mechanical properties of the TaC ceramics were investigated. Upon B addition, the elimination of O impurity and segregation of B at grain boundaries were evidenced, accompanied by an increase in bonding strength of the TaC grains, to result in a fracture mode change from intergranular to transgranular and a reduced fracture toughness. Addition of excessive B resulted in the formation of TaB2 and C within TaC ceramics. Further, TaC-TaB2-SiC composites were prepared by Si addition. Coherent bonding between TaB2 and TaC was preserved in the TaC-TaB2-SiC composites, and residual stresses due to thermal expansion mismatch of the different phases increased flexural strength and fracture toughness of the composites.

AB - TaC ceramics with 0-0.237 wt% B addition were prepared by hot pressing. The effect of B addition on the phase constitution, interfacial chemistry/bonding and mechanical properties of the TaC ceramics were investigated. Upon B addition, the elimination of O impurity and segregation of B at grain boundaries were evidenced, accompanied by an increase in bonding strength of the TaC grains, to result in a fracture mode change from intergranular to transgranular and a reduced fracture toughness. Addition of excessive B resulted in the formation of TaB2 and C within TaC ceramics. Further, TaC-TaB2-SiC composites were prepared by Si addition. Coherent bonding between TaB2 and TaC was preserved in the TaC-TaB2-SiC composites, and residual stresses due to thermal expansion mismatch of the different phases increased flexural strength and fracture toughness of the composites.

KW - Fracture toughness

KW - Grain boundary

KW - Microstructure

KW - Tantalum carbide

UR - https://www.scopus.com/pages/publications/85076491445

U2 - 10.1016/j.jeurceramsoc.2019.12.013

DO - 10.1016/j.jeurceramsoc.2019.12.013

M3 - 文章

AN - SCOPUS:85076491445

SN - 0955-2219

VL - 40

SP - 1067

EP - 1077

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 4

ER -

Strengthened interfacial bonding and its effects on fracture mode of TaC ceramics with addition of B

Abstract

Keywords

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