Investigation on mechanical properties of AlON ceramics synthesized by spark plasma sintering

Jia, Xi; Zhang, Zhaohui; Li, Xianyu; Xu, Tian-Hao; Liu, Luo‐Jin; Wang, Qiang; Jia, Zhao-Hu; Cheng, Xing-Wang

doi:10.1016/j.jeurceramsoc.2022.10.054

Cited by 15 publications

(2 citation statements)

References 47 publications

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“…The die was placed in the furnace chamber and then sintered using a DR. SINTER SPS‐3.20 system (Sojitz Machinery Corporation, Tokyo, Japan) with a pulse pattern of 12:2 and pulse duration of 3.3 ms under vacuum. According to previous research, the heating rate, sintering temperature, sintering pressure, and holding time were 100°C/min, 1580°C, 50 MPa, and 5 min, respectively 22 . Finally, the obtained AlON ceramics were ground and mirror‐polished to a thickness of 1 mm before optical transmittance measurements.…”

Section: Methodsmentioning

confidence: 99%

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Effects of sintering aids on microstructure, mechanical, and optical properties of AlON ceramics synthesized by SPS

Jia

Zhang

et al. 2023

J Am Ceram Soc.

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Aluminum oxynitride (AlON) ceramics doped with different sintering aids were synthesized by spark plasma sintering process. The microstructures, mechanical, and optical properties of the ceramics were investigated. The results indicate that the optimal amount of sintering aids is 0.06 wt% La 2 O 3 + 0.16 wt% Y 2 O 3 + 0.30 wt% MgO. The addition of La 3+ and Mg 2+ decreases the rate of grain boundary migration in ceramics, promotes pore elimination, and inhibits grain growth. The addition of Y 3+ facilitates liquid-phase sintering of AlON ceramics. Moreover, the addition of Mg 2+ effectively promotes twin formation in the ceramics, which hinders crack propagation and dislocation motion when the ceramics are loaded. Hence, the AlON ceramic doped with 0.06 wt% La 2 O 3 + 0.16 wt% Y 2 O 3 + 0.30 wt% MgO exhibits a relative density of 99.95%, an average grain size of 9.42 μm, and a twin boundary content of 10.3%, which contributes to its excellent mechanical and optical properties.

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Section: Methodsmentioning

confidence: 99%

“…According to previous research, the heating rate, sintering temperature, sintering pressure, and holding time were 100 • C/min, 1580 • C, 50 MPa, and 5 min, respectively. 22 Finally, the obtained AlON ceramics were ground and mirror-polished to a thickness of 1 mm before optical transmittance measurements.…”

Section: Materials Preparationmentioning

confidence: 99%