Characterization and Evaluation on Mechanical Property of Mg0.27Al2.58O3.73N0.27 Transparent Ceramic

doi:10.15541/jim20170556

Abstract

Abstract:

Owing to excellent optical and mechanical properties, MgAlON transparent ceramic has been considered as a potential candidate for important military and civilian applications in recent years. In this study, several characterizations were conducted to evaluate the hardness, fracture toughness, and flexural strength of Mg_0.27Al_2.58O_3.73N_0.27 transparent ceramic. Flexural strength at room temperature of Mg_0.27Al_2.58O_3.73N_0.27 were further analyzed using Weibull statistic. The results show that the Vicker’s hardness, flexural strength, fracture toughness, and Young’s modulus of the transparent ceramic were equal to 15.1 GPa, 255 MPa, 2.56 MPa/m^1/2, and 288 GPa, respectively, while the flexural strength of samples at 1200℃ was determined to be 125 MPa. The Weibull modulus of specimens was 4.5. Flexural strength and Vicker’s hardness of Mg_0.27Al_2.58O_3.73N_0.27 transparent ceramic were also investigated under different loading condition. The work reveals that mechanical properties of MgAlON transparent ceramic are higher than those of MgAl₂O₄ transparent ceramic, but a slightly lower than those of AlON transparent ceramic.

Key words: MgAlON, transparent ceramic, mechanical properties, Weibull statistic

CLC Number:

TQ174

ZHANG Zhou, WANG Hao, TU Bing-Tian, XU Peng-Yu, WANG Wei-Min, FU Zheng-Yi. Characterization and Evaluation on Mechanical Property of Mg_0.27Al_2.58O_3.73N_0.27 Transparent Ceramic[J]. Journal of Inorganic Materials, 2018, 33(9): 1006-1010.

Figures/Tables 9

References 25

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Property	Testing standards	Shape of specimens /testing condition	Number of specimens	Testing instruments
Flexural strength	ASTM C1499	Disks, ϕ 32.5 mm, h=1.4 mm	25	Universal Testing Machine (Model 810; MTS Systems Inc., Minneapolis, MN)
Fracture toughness	GB/T 23806-2009	Bars, 25 mm×5 mm×2.5 mm	10
Young's modulus	GB/T 10700-2006	Bars, 25 mm×5 mm×2.5 mm	10	Ultrasonic Equipment (EXPLORE-9000; Matec Instruments, Hookinton,MA)
Vicker's hardness	GB/T 16534-2009	0.3-3 kg, 10 s	10	Hardness Tester (Model 430 SVD; Wolpert, Shanghai, China)
High temperature flexural strength	GB/T 14390-2008	Bars, 50 mm×5 mm×3.5 mm	6	Made by China Building Materlals Academy

Property	Testing standards	Shape of specimens /testing condition	Number of specimens	Testing instruments
Flexural strength	ASTM C1499	Disks, ϕ 32.5 mm, h=1.4 mm	25	Universal Testing Machine (Model 810; MTS Systems Inc., Minneapolis, MN)
Fracture toughness	GB/T 23806-2009	Bars, 25 mm×5 mm×2.5 mm	10
Young's modulus	GB/T 10700-2006	Bars, 25 mm×5 mm×2.5 mm	10	Ultrasonic Equipment (EXPLORE-9000; Matec Instruments, Hookinton,MA)
Vicker's hardness	GB/T 16534-2009	0.3-3 kg, 10 s	10	Hardness Tester (Model 430 SVD; Wolpert, Shanghai, China)
High temperature flexural strength	GB/T 14390-2008	Bars, 50 mm×5 mm×3.5 mm	6	Made by China Building Materlals Academy

	Vickers hardness (9.8 N)/GPa	Young's modulus/GPa	Flexural strength/MPa	Fracture toughness/(MPa·m^-1/2)
Mg_0.27Al_2.58O_3.73N_0.27	15.1±0.5	288±7	255±10	2.56±0.2
MgAl₂O₄^[15]	13.3	277	190	1.8±0.2
AlON^[15]	15.5	315	300	2.9

	Vickers hardness (9.8 N)/GPa	Young's modulus/GPa	Flexural strength/MPa	Fracture toughness/(MPa·m^-1/2)
Mg_0.27Al_2.58O_3.73N_0.27	15.1±0.5	288±7	255±10	2.56±0.2
MgAl₂O₄^[15]	13.3	277	190	1.8±0.2
AlON^[15]	15.5	315	300	2.9