预施载荷抑制下氮化硅陶瓷崩碎损伤规律与机理

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英文篇名：Failure Rules and Mechanisms of Edge Chipping for Si_3N_4 Ceramics Suppressed by Pre-load 作者：唐修检 ; 王健全 ; 田欣利 ; 吴志远 ; 雷蕾 英文作者：TANG Xiu-jian;WANG Jian-quan;TIAN Xin-li;WU Zhi-yuan;LEI Lei;National Defense Key Laboratory for Remanufacturing Technology,Academy of Armored Force Engineering;China Astronaut Research and Training Center; 关键词：硬脆材料 ; 工程陶瓷 ; 崩碎损伤 ; 预施载荷 ; 声发射 英文关键词：hard-brittle materials;;engineering ceramics;;edge chipping;;pre-load;;acoustic emission 中文刊名：ZJBX 英文刊名：Journal of Academy of Armored Force Engineering 机构：装甲兵工程学院装备再制造技术国防科技重点实验室;中国航天员科研训练中心; 出版日期：2015-09-02 17:03 出版单位：装甲兵工程学院学报 年：2015 期：v.29;No.120 基金：国家自然科学基金资助项目(51105378) 语种：中文; 页：ZJBX201504020 页数：6 CN：04 ISSN：11-3984/E 分类号：101-106

摘要

针对硬脆材料的崩碎损伤问题,以氮化硅陶瓷为研究对象,建立了预施载荷抑制下的单晶压痕崩碎损伤实验系统,分析了不同预施载荷作用下的氮化硅陶瓷崩碎损伤的声发射信号特征,探究了预施载荷抑制硬脆材料的崩碎损伤规律与机理。结果表明:在预施载荷作用下,氮化硅陶瓷产生崩碎损伤的临界载荷和断裂时间明显提升,声发射计数和能量显著增加,通过预施载荷可有效抑制硬脆材料的崩碎损伤。
        An experiment system by single crystal indentation for Si3N4 ceramics is established to study the failure process of hard-brittle materials edge chipping suppressed by pre-load,the acoustic emission signals of Si3N4 ceramics edge chipping under different pre-load are analyzed,the failure rules and mechanisms are discussed. The results show that critical loads and fracture time for edge chipping suppressed by pre-load increase quickly,the count and energy of acoustic emission rise sharply,and pre-load can effectively suppress the edge chipping of hard-brittle materials.

引文

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