摘要
Si_(3)N_(4)作为一种无机非金属材料,因其具有高硬度、高机械强度和高热稳定性等特性,在切削工具、生物医学、电子、军事和汽车等领域被广泛应用。但Si_(3)N_(4)陶瓷自身的硬脆特性,使其在加工过程中容易形成表面缺陷,极大地降低了Si_(3)N_(4)陶瓷的可靠性。大量研究表明,以Si_(3)N_(4)为基体制备的复合陶瓷能有效弥补单一Si_(3)N_(4)陶瓷的劣势,即在Si_(3)N_(4)基体中添加第二相,其中通过添加BN制备的复合陶瓷在先进的工程应用中尤其有吸引力。Si_(3)N_(4)/BN复合陶瓷是一种耐高温、介电性能良好、可加工性能优异的高温透波陶瓷材料,具有良好的应用前景。本工作综述了近年来Si_(3)N_(4)/BN复合陶瓷制备和性能研究的进展,并讨论了陶瓷材料性能的优化以及今后所面临的挑战。
Si_(3)N_(4) is an inorganic nonmetallic material with high hardness,high mechanical strength and high thermal stability.It is widely used in cutting tools,biomedicine,electronics,military and automobile fields.However,due to the hard and brittle characteristics of Si_(3)N_(4) itself,surface defects are formed during processing,which greatly reduce the reliability of Si_(3)N_(4) ceramics.A large number of studies show that the composite ceramics prepared with Si_(3)N_(4) as matrix can effectively make up for the shortcomings of single Si_(3)N_(4) ceramics.Among them,the composite ceramics prepared by adding BN as the second phase are particularly attractive in advanced engineering applications.BN ceramics have good electrical insulation,oxidation resistance and corrosion resistance.It has a good application prospect as a heat conductive and insulating material.In addition,the densification process and grain growth of composite ceramics are affected by sintering process,thus changing the properties of composite ceramics.Therefore,the excellent properties of the two materials are taken into account by adding BN to the Si_(3)N_(4) ceramic matrix:the mechanical properties and dielectric properties of Si_(3)N_(4)-based composite ceramics are improved.In addition to thermal conductivity,Si_(3)N_(4)/BN composite ceramics also have other properties such as burning resistance,thermal shock resistance and microwave absorption.So as to prepare a high-temperature wave-transparent ceramic material with easy processing,excellent dielectric properties and thermal shock resistance.The mechanism research and structural design of sintering technology of Si_(3)N_(4)/BN composite ceramics need to match the current application requirements of ceramic materials,and the further improvement of its properties is still the focus of current research.In this review,the sintering process of Si_(3)N_(4)/BN composite ceramics is introduced,and the research progress of properties of Si_(3)N_(4)/BN composite ceramics in recent years is summarized.Finally,this study outlines the current challenges and areas for further research in Si_(3)N_(4)/BN composite ceramics development.
作者
赵蕾
孙玥
胡玉龙
方喆禹
金星
冉松林
Lei ZHAO;Yue SUN;Yulong HU;Zheyu FANG;Xing JIN;Songlin RAN(Key Laboratory of Metallurgical Emission Reduction&Resources Recycling,Ministry of Education,Anhui University of Technology,Ma'anshan,Anhui 243002,China)
出处
《过程工程学报》
北大核心
2025年第2期111-128,共18页
The Chinese Journal of Process Engineering
基金
安徽省自然科学基金青年项目(编号:2208085QE146)
安徽省自然科学基金重点项目(编号:KJ2021A0405)
国家自然科学基金青年项目(编号:52304417)。
关键词
氮化硅
氮化硼
复合陶瓷
加工性能
介电性能
Si_(3)N_(4)
BN
composite ceramics
machinability
dielectric property
