High-pressure synthesis of Al2O3-cBN composites: Effect of thermodynamic condition and cBN volume fraction on their microstructure and properties

Jiakun Wu; Haikuo Wang; Zhicai Zhang; Zhiqiang Hou; Dazhuan Wu; Xiaoping Ouyang

doi:10.1016/j.ijrmhm.2022.105969

High-pressure synthesis of Al₂O₃-cBN composites: Effect of thermodynamic condition and cBN volume fraction on their microstructure and properties

Jiakun Wu
, Haikuo Wang
, Zhicai Zhang
, Zhiqiang Hou
, Dazhuan Wu
, Xiaoping Ouyang

Zhejiang University
Xianghu High Tech Application Research Institute
Hunan University

科研成果: 期刊稿件 › 文章 › 同行评审

10 引用（Scopus）

摘要

Alumina with different amounts of Cubic boron nitride (cBN) was synthesized by a high-pressure sintering method. By adjusting the sintering temperature to a relatively low level, the undesirable reverse transformation from cBN to hBN was avoided, and almost entirely dense composites were obtained. The sintering behaviors, phase compositions, microstructures, and mechanical properties of Al₂O₃-cBN composites were investigated. The cBN phase significantly improved the modulus of elasticity and hardness, but the fracture toughness was only slightly increased. Vickers hardness of Al₂O₃–40 vol% cBN composites sintered at 850 °C showed a maximum value of 30 GPa. The Al₂O₃–30 vol% cBN composite sintered at 1250 °C had the highest fracture toughness of 5.7 MPa·m^1/2.

源语言	英语
文章编号	105969
期刊	International Journal of Refractory Metals and Hard Materials
卷	109
DOI	https://doi.org/10.1016/j.ijrmhm.2022.105969
出版状态	已出版 - 12月 2022
已对外发布	是

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@article{906c32783f9643aaa91788ee567fc9fe,

title = "High-pressure synthesis of Al2O3-cBN composites: Effect of thermodynamic condition and cBN volume fraction on their microstructure and properties",

abstract = "Alumina with different amounts of Cubic boron nitride (cBN) was synthesized by a high-pressure sintering method. By adjusting the sintering temperature to a relatively low level, the undesirable reverse transformation from cBN to hBN was avoided, and almost entirely dense composites were obtained. The sintering behaviors, phase compositions, microstructures, and mechanical properties of Al2O3-cBN composites were investigated. The cBN phase significantly improved the modulus of elasticity and hardness, but the fracture toughness was only slightly increased. Vickers hardness of Al2O3–40 vol\% cBN composites sintered at 850 °C showed a maximum value of 30 GPa. The Al2O3–30 vol\% cBN composite sintered at 1250 °C had the highest fracture toughness of 5.7 MPa·m1/2.",

keywords = "AlO, Cubic boron nitride, High pressure, Mechanical properties",

author = "Jiakun Wu and Haikuo Wang and Zhicai Zhang and Zhiqiang Hou and Dazhuan Wu and Xiaoping Ouyang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = dec,

doi = "10.1016/j.ijrmhm.2022.105969",

language = "英语",

volume = "109",

journal = "International Journal of Refractory Metals and Hard Materials",

issn = "0263-4368",

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TY - JOUR

T1 - High-pressure synthesis of Al2O3-cBN composites

T2 - Effect of thermodynamic condition and cBN volume fraction on their microstructure and properties

AU - Wu, Jiakun

AU - Wang, Haikuo

AU - Zhang, Zhicai

AU - Hou, Zhiqiang

AU - Wu, Dazhuan

AU - Ouyang, Xiaoping

PY - 2022/12

Y1 - 2022/12

N2 - Alumina with different amounts of Cubic boron nitride (cBN) was synthesized by a high-pressure sintering method. By adjusting the sintering temperature to a relatively low level, the undesirable reverse transformation from cBN to hBN was avoided, and almost entirely dense composites were obtained. The sintering behaviors, phase compositions, microstructures, and mechanical properties of Al2O3-cBN composites were investigated. The cBN phase significantly improved the modulus of elasticity and hardness, but the fracture toughness was only slightly increased. Vickers hardness of Al2O3–40 vol% cBN composites sintered at 850 °C showed a maximum value of 30 GPa. The Al2O3–30 vol% cBN composite sintered at 1250 °C had the highest fracture toughness of 5.7 MPa·m1/2.

AB - Alumina with different amounts of Cubic boron nitride (cBN) was synthesized by a high-pressure sintering method. By adjusting the sintering temperature to a relatively low level, the undesirable reverse transformation from cBN to hBN was avoided, and almost entirely dense composites were obtained. The sintering behaviors, phase compositions, microstructures, and mechanical properties of Al2O3-cBN composites were investigated. The cBN phase significantly improved the modulus of elasticity and hardness, but the fracture toughness was only slightly increased. Vickers hardness of Al2O3–40 vol% cBN composites sintered at 850 °C showed a maximum value of 30 GPa. The Al2O3–30 vol% cBN composite sintered at 1250 °C had the highest fracture toughness of 5.7 MPa·m1/2.

KW - AlO

KW - Cubic boron nitride

KW - High pressure

KW - Mechanical properties

UR - https://www.scopus.com/pages/publications/85136566709

U2 - 10.1016/j.ijrmhm.2022.105969

DO - 10.1016/j.ijrmhm.2022.105969

M3 - 文章

AN - SCOPUS:85136566709

SN - 0263-4368

VL - 109

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

M1 - 105969

ER -

High-pressure synthesis of Al2O3-cBN composites: Effect of thermodynamic condition and cBN volume fraction on their microstructure and properties

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High-pressure synthesis of Al₂O₃-cBN composites: Effect of thermodynamic condition and cBN volume fraction on their microstructure and properties