TiB2-B4C复合陶瓷动态压缩特性研究

doi:10.3969/j.issn.1000-1093.2019.11.015

兵工学报 ›› 2019, Vol. 40 ›› Issue (11): 2304-2310.doi: 10.3969/j.issn.1000-1093.2019.11.015

TiB₂-B₄C复合陶瓷动态压缩特性研究

高玉波¹，秦国华¹，张伟²，宜晨虹³，邓勇军⁴

(1.中北大学理学院, 山西太原 030051; 2.哈尔滨工业大学航天学院, 黑龙江哈尔滨 150080;3.中国工程物理研究院流体物理研究所, 四川绵阳 621900;4.西南科技大学工程材料与结构冲击振动四川省重点实验室, 四川绵阳 621010)

收稿日期:2019-01-09 修回日期:2019-01-09 上线日期:2019-12-31
作者简介:高玉波（1986—），男，副教授，硕士生导师，博士。E-mail: gaoyb@nuc.edu.cn
基金资助:
国家自然科学基金项目（11702257）；山西省自然科学基金项目（201801D221036）；中国空气动力研究与发展中心超高速碰撞研究中心开放基金项目（20190101）

Research on Dynamic Compression Properties of TiB₂-B₄C Composite

GAO Yubo¹， QIN Guohua¹, ZHANG Wei²， YI Chenhong³, DENG Yongjun⁴

(1.School of Science, North University of China, Taiyuan 030051, Shanxi, China; 2.School of Astronautics, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China;3.Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China; 4.Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China)

Received:2019-01-09 Revised:2019-01-09 Online:2019-12-31

摘要/Abstract

摘要： 为分析TiB₂-B₄C复合陶瓷的静动态力学性能及添加剂TiB₂的影响机制，设计了静动态压缩实验和平板撞击实验，开展了复合陶瓷在不同应变率下的动态压缩特性研究。结果表明：一维应力波加载下TiB₂-B₄C复合材料具有陶瓷材料的脆性特征，应力-应变曲线呈典型的线性关系；由一维应变加载下试样的自由面速度历程可知，复合材料的Hugoniot弹性极限在14.98~16.91 GPa之间，且随着应变率的增加而增加；应变率低于10³ s^-1时，TiB₂-B₄C复合材料的动态压缩强度高于单相B₄C和单相TiB₂陶瓷，且具有正相关的应变率敏感性，复合材料强度的提升得益于微观结构的改善，而应变率敏感性主要受添加剂TiB₂的强化增韧媒介影响；然而，应变率高于10⁴ s^-1时，TiB₂-B₄C复合材料的Hugoniot弹性极限接近基体B₄C陶瓷，而受添加剂TiB₂的影响较小。

关键词: TiB₂-B₄C复合陶瓷, 动态力学性能, 应变率效应, 压缩特性

Abstract: In order to study the dynamic mechanical properties of TiB₂-B₄C composite and the effect of additive TiB2 on the mechanical properties, a series of static/dynamic compression experiments and plate impact experiments were designed to evaluate the dynamic compression property of the composite at different strain rates. Experimental results show that the TiB₂-B₄C composite is a brittle material as ceramic. The stress-strain relations of the composite show a typical linear characteristic. The Hugoniot elastic limit of the composite is increased from 14.98 to 16.91 GPa with the increass in loading strain rate. When the loading rate is lower than 10³ s^-1, the dynamic compression strength of TiB₂-B₄C composite is higher than those of the pure B₄C and pure TiB₂ ceramic, and it has a positive strain rate sensitivity under one-dimensional stress wave loading. The increase in compression strength of the composite benefits from the improvement of the microstructure. The strain rate sensitivity is mainly controlled by the additive TiB₂ which serves as a strengthening and toughening agent. However, when the loading rate is higher than 10⁴ s^-1, the Hugoniot elastic limit of TiB₂-B₄C composite is close to that of the matrix B₄C, and is little affected by the additive TiB₂. Key

Key words: TiB₂-B₄Ccomposite, dynamicmechanicalproperty, strainrateeffect, compressionproperty

中图分类号:

O347.3

高玉波，秦国华，张伟，宜晨虹，邓勇军. TiB₂-B₄C复合陶瓷动态压缩特性研究[J]. 兵工学报, 2019, 40(11): 2304-2310.

GAO Yubo， QIN Guohua, ZHANG Wei， YI Chenhong, DENG Yongjun. Research on Dynamic Compression Properties of TiB₂-B₄C Composite[J]. Acta Armamentarii, 2019, 40(11): 2304-2310.

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TiB₂-B₄C复合陶瓷动态压缩特性研究

Research on Dynamic Compression Properties of TiB₂-B₄C Composite

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