Flexural strength behavior of a ZrB2–TaB2 composite consolidated by non-reactive spark plasma sintering at 2300 °C

Dmytro Demirskyi; Oleg Vasylkiv

doi:10.1016/j.ijrmhm.2017.02.003

Flexural strength behavior of a ZrB₂–TaB₂ composite consolidated by non-reactive spark plasma sintering at 2300 °C

Dmytro Demirskyi, Oleg Vasylkiv

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

12 Citations (Scopus)

Abstract

A bulk zirconium–tantalum diboride ceramic composite was consolidated by non-reactive spark plasma sintering (SPS) at 2300 °C. In order to consolidate the ZrB₂–44 wt% TaB₂ composite and restrict grain-growth, a special loading procedure was used. Pressure was applied and released at 2150 °C and 1250 °C, respectively. These SPS conditions allowed us to obtain a crack-free bulk composite with a grain size of 4–8 μm. Flexural strength at temperatures up to 1800 °C was measured for the ZrB₂–TaB₂ composite. Importantly, at 1600 °C, the strength was 336 ± 23 MPa, which is superior to that of monolithic ZrB₂. Moreover, the ZrB₂–TaB₂ composite only showed plastic behavior at 1800 °C, a finding that is atypical for ZrB₂-based ceramics.

Original language	English
Pages (from-to)	31-35
Number of pages	5
Journal	International Journal of Refractory Metals and Hard Materials
Volume	66
DOIs	https://doi.org/10.1016/j.ijrmhm.2017.02.003
Publication status	Published - 2017 Aug 1
Externally published	Yes

Keywords

Composite
Spark plasma sintering
Strength
Tantalum diboride
Zirconium diboride

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.ijrmhm.2017.02.003

Cite this

@article{b679700650e0456194eca7465a321e75,

title = "Flexural strength behavior of a ZrB2–TaB2 composite consolidated by non-reactive spark plasma sintering at 2300 °C",

abstract = "A bulk zirconium–tantalum diboride ceramic composite was consolidated by non-reactive spark plasma sintering (SPS) at 2300 °C. In order to consolidate the ZrB2–44 wt% TaB2 composite and restrict grain-growth, a special loading procedure was used. Pressure was applied and released at 2150 °C and 1250 °C, respectively. These SPS conditions allowed us to obtain a crack-free bulk composite with a grain size of 4–8 μm. Flexural strength at temperatures up to 1800 °C was measured for the ZrB2–TaB2 composite. Importantly, at 1600 °C, the strength was 336 ± 23 MPa, which is superior to that of monolithic ZrB2. Moreover, the ZrB2–TaB2 composite only showed plastic behavior at 1800 °C, a finding that is atypical for ZrB2-based ceramics.",

keywords = "Composite, Spark plasma sintering, Strength, Tantalum diboride, Zirconium diboride",

author = "Dmytro Demirskyi and Oleg Vasylkiv",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

month = aug,

day = "1",

doi = "10.1016/j.ijrmhm.2017.02.003",

language = "English",

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AU - Demirskyi, Dmytro

AU - Vasylkiv, Oleg

PY - 2017/8/1

Y1 - 2017/8/1

N2 - A bulk zirconium–tantalum diboride ceramic composite was consolidated by non-reactive spark plasma sintering (SPS) at 2300 °C. In order to consolidate the ZrB2–44 wt% TaB2 composite and restrict grain-growth, a special loading procedure was used. Pressure was applied and released at 2150 °C and 1250 °C, respectively. These SPS conditions allowed us to obtain a crack-free bulk composite with a grain size of 4–8 μm. Flexural strength at temperatures up to 1800 °C was measured for the ZrB2–TaB2 composite. Importantly, at 1600 °C, the strength was 336 ± 23 MPa, which is superior to that of monolithic ZrB2. Moreover, the ZrB2–TaB2 composite only showed plastic behavior at 1800 °C, a finding that is atypical for ZrB2-based ceramics.

AB - A bulk zirconium–tantalum diboride ceramic composite was consolidated by non-reactive spark plasma sintering (SPS) at 2300 °C. In order to consolidate the ZrB2–44 wt% TaB2 composite and restrict grain-growth, a special loading procedure was used. Pressure was applied and released at 2150 °C and 1250 °C, respectively. These SPS conditions allowed us to obtain a crack-free bulk composite with a grain size of 4–8 μm. Flexural strength at temperatures up to 1800 °C was measured for the ZrB2–TaB2 composite. Importantly, at 1600 °C, the strength was 336 ± 23 MPa, which is superior to that of monolithic ZrB2. Moreover, the ZrB2–TaB2 composite only showed plastic behavior at 1800 °C, a finding that is atypical for ZrB2-based ceramics.

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KW - Spark plasma sintering

KW - Strength

KW - Tantalum diboride

KW - Zirconium diboride

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