无机材料学报 ›› 2018, Vol. 33 ›› Issue (9): 1006-1010.DOI: 10.15541/jim20170556

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Mg0.27Al2.58O3.73N0.27透明陶瓷机械性能评价

张舟, 王皓, 涂兵田, 徐鹏宇, 王为民, 傅正义   

  1. 武汉理工大学 材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2017-11-20 修回日期:2018-02-21 出版日期:2018-09-20 网络出版日期:2018-08-14
  • 作者简介:张 舟(1991-), 男, 硕士研究生. E-mail: 15072300967@163.com
  • 基金资助:
    国家重点研发计划(2017YFB0310500);国家自然科学基金(51472195, 51502219)

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

ZHANG Zhou, WANG Hao, TU Bing-Tian, XU Peng-Yu, WANG Wei-Min, FU Zheng-Yi   

  1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Received:2017-11-20 Revised:2018-02-21 Published:2018-09-20 Online:2018-08-14
  • About author:ZHANG Zhou. E-mail: 15072300967@163.com
  • Supported by:
    The National Key Research and Development Program of China (2017YFB0310500);National Natural Science Foundation of China (51472195, 51502219)

摘要:

MgAlON透明陶瓷具有优良的光学与机械性能, 在军用和民用领域均具有重要的应用潜力。本研究表征并评价了Mg0.27Al2.58O3.73N0.27透明陶瓷的机械性能, 实验测定了Mg0.27Al2.58O3.73N0.27透明陶瓷的维氏硬度、断裂韧性以及室温和高温断裂强度, 并使用Weibull函数对室温断裂强度测试结果进行统计。结果表明: 该透明陶瓷特征断裂强度为255 MPa、断裂韧性为2.56 MPa/m1/2、杨氏模量为288 GPa、硬度为15.1 GPa。样品的Weibull模数为4.5, 1200℃下样品断裂强度达125 MPa。同时还测定了不同载荷下Mg0.27Al2.58O3.73N0.27透明陶瓷的硬度与不同载荷加载速率下的断裂强度。研究表明MgAlON光学透明陶瓷机械性能介于AlON和MgAl2O4之间。

 

关键词: MgAlON, 透明陶瓷, 机械性能, Weibull统计

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 Mg0.27Al2.58O3.73N0.27 transparent ceramic. Flexural strength at room temperature of Mg0.27Al2.58O3.73N0.27 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/m1/2, 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 Mg0.27Al2.58O3.73N0.27 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

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