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。本研究探索了MgAlON透明陶瓷的热压/热等静压工艺,使用BN材料解决热压烧结碳污染的问题,制备了光学性能优异的Mg_(0.27)Al_(2.58)O_(3.73)N_(0.27)透明陶瓷,并进一步表征了其直线透过率、维氏硬度、断裂韧性以及室温弯曲强度等性能。BN包裹样品有效隔离了高温烧结中的碳污染,Mg_(0.27)Al_(2.58)O_(3.73)N_(0.27)透明陶瓷在650 nm处的直线透过率从36.51%提高到73.74%。与无压烧结相比,热压结合热等静压烧结Mg_(0.27)Al_(2.58)O_(3.73)N_(0.27)透明陶瓷具有更加优异的力学性能,其弯曲强度为387.12 MPa,断裂韧性为(3.31±0.20)MPa·m^(1/2),硬度为(15.3±0.7)GPa。本研究可为MgAlON透明陶瓷的性能提升和工程化制备提供重要参考。
MgAlON transparent ceramics have excellent optical and mechanical properties,and have potential applications in both military and civilian fields.In this study,the hot pressing and hot isostatic pressing techniques have been introduced into the fabrication and processing of MgAlON transparent ceramics.The BN material was used to solve the problem of carbon contamination during hot pressing sintering.Mg_(0.27)Al_(2.58)O_(3.73)N_(0.27) transparent ceramics with good optical properties were obtained.The in-line transmittance,Vickers hardness,fracture toughness and room temperature flexural strength were also characterized.Using BN to wrap the sample effectively eliminates the carbon contamination during high-temperature sintering,and the in-line transmittance of Mg_(0.27)Al_(2.58)O_(3.73)N_(0.27) transparent ceramics at 650 nm increases from 36.51% to 73.74%.Compared with pressureless sintering,hot pressing combined with hot isostatic pressing sintered Mg_(0.27)Al_(2.58)O_(3.73)N_(0.27) transparent ceramics have better mechanical properties,with flexural strength of 387.12 MPa,fracture toughness of(3.31±0.20) MPa·m^(1/2) and hardness of(15.3±0.7) GPa.The research can provide an important reference for improving the performance and technical preparation of MgAlON transparent ceramics.
作者
陈浩
杨静潇
徐勇
靖正阳
涂兵田
王皓
CHEN Hao;YANG Jingxiao;XU Yong;JING Zhengyang;TU Bingtian;WANG Hao(State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Hubei Longzhong Laboratory,Xiangyang 441000,China)
出处
《硅酸盐通报》
CAS
北大核心
2024年第9期3378-3385,共8页
Bulletin of the Chinese Ceramic Society
基金
国家重点研发计划(2023YFB3812000)
国家自然科学基金(52272072)
湖北隆中实验室自主创新研究项目(2022ZZ-13)。
作者简介
陈浩(1996-),男,硕士研究生。主要从事透明陶瓷材料的研究。E-mail:chen2021@whut.edu.cn;通信作者:涂兵田,博士,研究员。E-mail:tubt@whut.edu.cn。
