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

9 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

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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",

year = "2017",

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day = "1",

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

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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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