Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites

Owing to their extreme hardness, cubic boron nitride (cBN) composites are widely used in cutting applications. The performance of cBN composites is closely related to the characteristics of the binder. Therefore, novel binders must be developed to improve the performance of cBN composites. In the pr...

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Autores principales:	Yuxi Liu, Wei Zhang, Yingbo Peng, Guojiang Fan, Bin Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cubic boron nitride TiAl alloy high-temperature and high-pressure sintering method flexural strength Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/675440c62f36471f86bedcfc29810f93
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spelling	oai:doaj.org-article:675440c62f36471f86bedcfc29810f932021-11-11T17:54:23ZEffects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites10.3390/ma142163351996-1944https://doaj.org/article/675440c62f36471f86bedcfc29810f932021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6335https://doaj.org/toc/1996-1944Owing to their extreme hardness, cubic boron nitride (cBN) composites are widely used in cutting applications. The performance of cBN composites is closely related to the characteristics of the binder. Therefore, novel binders must be developed to improve the performance of cBN composites. In the present work, TiAl intermetallics were used as binders to fabricate cBN composites by employing a high-temperature and high-pressure sintering method. The phase transformation, sintering reaction mechanism, thermal stability, and mechanical properties of the resultant cBN composites were investigated. It was found that during the sintering process, Ti atoms preferentially reacted with boron nitride particles, whereas Al atoms enriched and transformed into TiAl<sub>3</sub> phases and formed cBN/AlN, AlB<sub>2</sub>/TiN, and TiB<sub>2</sub>/TiAl<sub>3</sub>-layered structures eventually. The composites maintained good oxidation resistance at 1200 °C. A decrease in the particle size of the TiAl binder improved the uniformity of particle size distribution and increased the flexural strength of the composites.Yuxi LiuWei ZhangYingbo PengGuojiang FanBin LiuMDPI AGarticlecubic boron nitrideTiAl alloyhigh-temperature and high-pressure sintering methodflexural strengthTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6335, p 6335 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cubic boron nitride TiAl alloy high-temperature and high-pressure sintering method flexural strength Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	cubic boron nitride TiAl alloy high-temperature and high-pressure sintering method flexural strength Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Yuxi Liu Wei Zhang Yingbo Peng Guojiang Fan Bin Liu Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites
description	Owing to their extreme hardness, cubic boron nitride (cBN) composites are widely used in cutting applications. The performance of cBN composites is closely related to the characteristics of the binder. Therefore, novel binders must be developed to improve the performance of cBN composites. In the present work, TiAl intermetallics were used as binders to fabricate cBN composites by employing a high-temperature and high-pressure sintering method. The phase transformation, sintering reaction mechanism, thermal stability, and mechanical properties of the resultant cBN composites were investigated. It was found that during the sintering process, Ti atoms preferentially reacted with boron nitride particles, whereas Al atoms enriched and transformed into TiAl<sub>3</sub> phases and formed cBN/AlN, AlB<sub>2</sub>/TiN, and TiB<sub>2</sub>/TiAl<sub>3</sub>-layered structures eventually. The composites maintained good oxidation resistance at 1200 °C. A decrease in the particle size of the TiAl binder improved the uniformity of particle size distribution and increased the flexural strength of the composites.
format	article
author	Yuxi Liu Wei Zhang Yingbo Peng Guojiang Fan Bin Liu
author_facet	Yuxi Liu Wei Zhang Yingbo Peng Guojiang Fan Bin Liu
author_sort	Yuxi Liu
title	Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites
title_short	Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites
title_full	Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites
title_fullStr	Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites
title_full_unstemmed	Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites
title_sort	effects of tial alloy as a binder on cubic boron nitride composites
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/675440c62f36471f86bedcfc29810f93
work_keys_str_mv	AT yuxiliu effectsoftialalloyasabinderoncubicboronnitridecomposites AT weizhang effectsoftialalloyasabinderoncubicboronnitridecomposites AT yingbopeng effectsoftialalloyasabinderoncubicboronnitridecomposites AT guojiangfan effectsoftialalloyasabinderoncubicboronnitridecomposites AT binliu effectsoftialalloyasabinderoncubicboronnitridecomposites
_version_	1718432003774218240

Effects of TiAl Alloy as a Binder on Cubic Boron Nitride Composites

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