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

Radiation Effects and Microstructural An

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

6 Scopus citations

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
Pages (from-to)	21660-21667
Number of pages	8
Journal	Ceramics International
Volume	47
Issue number	15
DOIs	https://doi.org/10.1016/j.ceramint.2021.04.179
State	Published - Aug 1 2021

Funding

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 ). 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).

Keywords

Borides
Mechanical alloying
Porosity
Sintering

Access to Document

10.1016/j.ceramint.2021.04.179

Cite this

@article{ebbf99d50f464a69bc6145108dd26bec,

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 = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd and Techna Group S.r.l.",

year = "2021",

month = aug,

day = "1",

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

language = "English",

volume = "47",

pages = "21660--21667",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier",

number = "15",

}

TY - JOUR

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

PY - 2021/8/1

Y1 - 2021/8/1

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

UR - https://www.scopus.com/pages/publications/85105084387

U2 - 10.1016/j.ceramint.2021.04.179

DO - 10.1016/j.ceramint.2021.04.179

M3 - Article

AN - SCOPUS:85105084387

SN - 0272-8842

VL - 47

SP - 21660

EP - 21667

JO - Ceramics International

JF - Ceramics International

IS - 15

ER -