Effect of mechanically alloyed sintering aid on sinterability of TiB2

Yuki Jimba; Sosuke Kondo; Hao Yu; Haoran Wang; Yasuki Okuno; Ryuta Kasada

doi:10.1016/j.ceramint.2021.04.179

Effect of mechanically alloyed sintering aid on sinterability of TiB₂

Yuki Jimba, Sosuke Kondo, Hao Yu, Haoran Wang, Yasuki Okuno, Ryuta Kasada

Materials Design Division

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

3 Citations (Scopus)

Abstract

High-melting-point borides are attractive for structural and functional materials used in extreme environments. However, their poor sinterability due to their high melting point and strong covalent bonding have prevented their further applications. In this study, a new sintering process, called transient liquid-phase diffusion sintering (TLPDS), has been developed for high-melting-point borides. TiB₂ compacts were fabricated by spark plasma sintering at 50 MPa for 15 min at temperatures of 1300 and 1600 °C via TLPDS of TiB₂ powder with a eutectic TiB–Ti powder as the sintering aid, prepared via mechanical alloying (MA). Differential scanning calorimetry results indicated that the melting temperature of the obtained sintering aid was lower than its equilibrium melting point. MA of the sintering aid suppressed the open pore fraction to one-third of that in the compact sintered with the aid prepared without MA when sintering at 1300 °C. We also propose a possible mechanism for TLPDS of TiB₂.

Original language	English
Journal	Ceramics International
DOIs	https://doi.org/10.1016/j.ceramint.2021.04.179
Publication status	Accepted/In press - 2021

Keywords

Borides
Mechanical alloying
Porosity
Sintering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.ceramint.2021.04.179

Cite this

@article{84c0324614d249638644151f63f9ef05,

title = "Effect of mechanically alloyed sintering aid on sinterability of TiB2",

abstract = "High-melting-point borides are attractive for structural and functional materials used in extreme environments. However, their poor sinterability due to their high melting point and strong covalent bonding have prevented their further applications. In this study, a new sintering process, called transient liquid-phase diffusion sintering (TLPDS), has been developed for high-melting-point borides. TiB2 compacts were fabricated by spark plasma sintering at 50 MPa for 15 min at temperatures of 1300 and 1600 °C via TLPDS of TiB2 powder with a eutectic TiB–Ti powder as the sintering aid, prepared via mechanical alloying (MA). Differential scanning calorimetry results indicated that the melting temperature of the obtained sintering aid was lower than its equilibrium melting point. MA of the sintering aid suppressed the open pore fraction to one-third of that in the compact sintered with the aid prepared without MA when sintering at 1300 °C. We also propose a possible mechanism for TLPDS of TiB2.",

keywords = "Borides, Mechanical alloying, Porosity, Sintering",

author = "Yuki Jimba and Sosuke Kondo and Hao Yu and Haoran Wang and Yasuki Okuno and Ryuta Kasada",

note = "Funding Information: This work was partly performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 20G0412). The SXES and Thermo-Calc calculation were supported by the “Joint Usage/Research Program on Zero-Emission Energy Research, Institute of Advanced Energy, Kyoto University ( ZE2020A-13 ). Funding Information: The authors are grateful to Dr. Kazuya Shimoda for his fruitful discussions. Dr. Kiyohiro Yabuuchi from Kyoto University supported us with the Thermo-Calc analyses. This work was partly performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 20G0412). The SXES and Thermo-Calc calculation were supported by the ?Joint Usage/Research Program on Zero-Emission Energy Research, Institute of Advanced Energy, Kyoto University (ZE2020A-13). Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd and Techna Group S.r.l.",

year = "2021",

doi = "10.1016/j.ceramint.2021.04.179",

language = "English",

journal = "Ceramics International",

issn = "0272-8842",

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T1 - Effect of mechanically alloyed sintering aid on sinterability of TiB2

AU - Jimba, Yuki

AU - Kondo, Sosuke

AU - Yu, Hao

AU - Wang, Haoran

AU - Okuno, Yasuki

AU - Kasada, Ryuta

N1 - Funding Information: This work was partly performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 20G0412). The SXES and Thermo-Calc calculation were supported by the “Joint Usage/Research Program on Zero-Emission Energy Research, Institute of Advanced Energy, Kyoto University ( ZE2020A-13 ). Funding Information: The authors are grateful to Dr. Kazuya Shimoda for his fruitful discussions. Dr. Kiyohiro Yabuuchi from Kyoto University supported us with the Thermo-Calc analyses. This work was partly performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 20G0412). The SXES and Thermo-Calc calculation were supported by the ?Joint Usage/Research Program on Zero-Emission Energy Research, Institute of Advanced Energy, Kyoto University (ZE2020A-13). Publisher Copyright: © 2021 Elsevier Ltd and Techna Group S.r.l.

PY - 2021

Y1 - 2021

N2 - High-melting-point borides are attractive for structural and functional materials used in extreme environments. However, their poor sinterability due to their high melting point and strong covalent bonding have prevented their further applications. In this study, a new sintering process, called transient liquid-phase diffusion sintering (TLPDS), has been developed for high-melting-point borides. TiB2 compacts were fabricated by spark plasma sintering at 50 MPa for 15 min at temperatures of 1300 and 1600 °C via TLPDS of TiB2 powder with a eutectic TiB–Ti powder as the sintering aid, prepared via mechanical alloying (MA). Differential scanning calorimetry results indicated that the melting temperature of the obtained sintering aid was lower than its equilibrium melting point. MA of the sintering aid suppressed the open pore fraction to one-third of that in the compact sintered with the aid prepared without MA when sintering at 1300 °C. We also propose a possible mechanism for TLPDS of TiB2.

AB - High-melting-point borides are attractive for structural and functional materials used in extreme environments. However, their poor sinterability due to their high melting point and strong covalent bonding have prevented their further applications. In this study, a new sintering process, called transient liquid-phase diffusion sintering (TLPDS), has been developed for high-melting-point borides. TiB2 compacts were fabricated by spark plasma sintering at 50 MPa for 15 min at temperatures of 1300 and 1600 °C via TLPDS of TiB2 powder with a eutectic TiB–Ti powder as the sintering aid, prepared via mechanical alloying (MA). Differential scanning calorimetry results indicated that the melting temperature of the obtained sintering aid was lower than its equilibrium melting point. MA of the sintering aid suppressed the open pore fraction to one-third of that in the compact sintered with the aid prepared without MA when sintering at 1300 °C. We also propose a possible mechanism for TLPDS of TiB2.

KW - Borides

KW - Mechanical alloying

KW - Porosity

KW - Sintering

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