Analysis of the high-temperature flexural strength behavior of B4C–TaB2 eutectic composites produced by in situ spark plasma sintering

Dmytro Demirskyi; Oleg Vasylkiv

doi:10.1016/j.msea.2017.04.093

Analysis of the high-temperature flexural strength behavior of B₄C–TaB₂ eutectic composites produced by in situ spark plasma sintering

Dmytro Demirskyi, Oleg Vasylkiv

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

14 Citations (Scopus)

Abstract

In this study, flexural strength measurements and microstructural studies have been combined to evaluate the effect of elevated temperatures on the fracture behavior of B₄C–TaB₂ ceramic composites that have a eutectic structure. Mechanical characterization was carried out at 1600 °C, 1800 °C and 2000 °C. The B₄C–TaB₂ eutectic composites were prepared in situ using a spark plasma sintering technique. The eutectic composites exhibited strengths of 483±17 MPa and 525±12 MPa at 1600 °C and 1800 °C, respectively, which is higher than the strength of 430±25 MPa measured at room temperature. The flexural strength of the B₄C–TaB₂ eutectic composites was 511±16 MPa at 2000 °C (i.e. 0.86 of the melting point of the B₄C–TaB₂ eutectic), indicating plastic behavior. Analyses of the high-temperature flexural strength behavior of this non-oxide eutectic are reported.

Original language	English
Pages (from-to)	71-78
Number of pages	8
Journal	Materials Science and Engineering A
Volume	697
DOIs	https://doi.org/10.1016/j.msea.2017.04.093
Publication status	Published - 2017 Jun 14
Externally published	Yes

Keywords

Boron carbide
Eutectic composite
High-temperature strength
Spark plasma sintering
Tantalum diboride

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.msea.2017.04.093

Cite this

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title = "Analysis of the high-temperature flexural strength behavior of B4C–TaB2 eutectic composites produced by in situ spark plasma sintering",

abstract = "In this study, flexural strength measurements and microstructural studies have been combined to evaluate the effect of elevated temperatures on the fracture behavior of B4C–TaB2 ceramic composites that have a eutectic structure. Mechanical characterization was carried out at 1600 °C, 1800 °C and 2000 °C. The B4C–TaB2 eutectic composites were prepared in situ using a spark plasma sintering technique. The eutectic composites exhibited strengths of 483±17 MPa and 525±12 MPa at 1600 °C and 1800 °C, respectively, which is higher than the strength of 430±25 MPa measured at room temperature. The flexural strength of the B4C–TaB2 eutectic composites was 511±16 MPa at 2000 °C (i.e. 0.86 of the melting point of the B4C–TaB2 eutectic), indicating plastic behavior. Analyses of the high-temperature flexural strength behavior of this non-oxide eutectic are reported.",

keywords = "Boron carbide, Eutectic composite, High-temperature strength, Spark plasma sintering, Tantalum diboride",

author = "Dmytro Demirskyi and Oleg Vasylkiv",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

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doi = "10.1016/j.msea.2017.04.093",

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AU - Demirskyi, Dmytro

AU - Vasylkiv, Oleg

PY - 2017/6/14

Y1 - 2017/6/14

N2 - In this study, flexural strength measurements and microstructural studies have been combined to evaluate the effect of elevated temperatures on the fracture behavior of B4C–TaB2 ceramic composites that have a eutectic structure. Mechanical characterization was carried out at 1600 °C, 1800 °C and 2000 °C. The B4C–TaB2 eutectic composites were prepared in situ using a spark plasma sintering technique. The eutectic composites exhibited strengths of 483±17 MPa and 525±12 MPa at 1600 °C and 1800 °C, respectively, which is higher than the strength of 430±25 MPa measured at room temperature. The flexural strength of the B4C–TaB2 eutectic composites was 511±16 MPa at 2000 °C (i.e. 0.86 of the melting point of the B4C–TaB2 eutectic), indicating plastic behavior. Analyses of the high-temperature flexural strength behavior of this non-oxide eutectic are reported.

AB - In this study, flexural strength measurements and microstructural studies have been combined to evaluate the effect of elevated temperatures on the fracture behavior of B4C–TaB2 ceramic composites that have a eutectic structure. Mechanical characterization was carried out at 1600 °C, 1800 °C and 2000 °C. The B4C–TaB2 eutectic composites were prepared in situ using a spark plasma sintering technique. The eutectic composites exhibited strengths of 483±17 MPa and 525±12 MPa at 1600 °C and 1800 °C, respectively, which is higher than the strength of 430±25 MPa measured at room temperature. The flexural strength of the B4C–TaB2 eutectic composites was 511±16 MPa at 2000 °C (i.e. 0.86 of the melting point of the B4C–TaB2 eutectic), indicating plastic behavior. Analyses of the high-temperature flexural strength behavior of this non-oxide eutectic are reported.

KW - Boron carbide

KW - Eutectic composite

KW - High-temperature strength

KW - Spark plasma sintering

KW - Tantalum diboride

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