Understanding the ballistic event: methodology and initial observations
Understanding the ballistic event: methodology and initial observations
复制标题
DOI：
10.1007/s10853-016-0594-0
复制
发表时间：
2017-03-01
影响因子：
4.5
通讯作者：
Yeomans, Julie
中科院分区：
文献类型：
--
作者：
Healey, Adam;Cotton, John;Yeomans, Julie
这项研究的目的是通过大量增加从高能射弹撞击事件中获得的信息来加速装甲应用陶瓷材料的发展。这是通过修改现有的测试配置来实现的，将一块弹道凝胶附在陶瓷装甲系统的打击面上，以捕获弹道事件期间产生的碎片，从而保持其最终位置。三种不同的材料，代表陶瓷的主要类别的装甲应用，氧化铝，碳化硅和碳化硼，已使用该系统进行了测试。环对环双轴圆盘试验也已进行了相同的材料。通过立体成像，使用扫描电子显微镜和表面粗糙度量化对断裂表面进行定性分析，结果表明，从瓷砖边缘回收的双轴碎片和弹道碎片的断裂表面无法区分。虽然从更接近撞击点的区域产生的氧化铝和碳化硼碎片也是相似的，但碳化硅碎片显示出相对于来自更远的碎片和来自双轴测试的孔隙度增加。发现这种孔隙率是由于富含硼的第二相的损失造成的，该第二相在材料的其他地方广泛存在，尽管这与弹道性能的相关性需要进一步研究。这项工作中开发的技术将有助于促进此类研究。
The purpose of the study is to accelerate the development of ceramic materials for armour applications by substantially increasing the information obtained from a high-energy projectile impact event. This has been achieved by modifying an existing test configuration to incorporate a block of ballistic gel, attached to the strike face of a ceramic armour system, to capture fragments generated during the ballistic event such that their final positions are maintained. Three different materials, representative of the major classes of ceramics for armour applications, alumina, silicon carbide, and boron carbide, have been tested using this system. Ring-on-ring biaxial disc testing has also been carried out on the same materials. Qualitative analysis of the fracture surfaces using scanning electron microscopy and surface roughness quantification, via stereo imaging, has shown that the fracture surfaces of biaxial fragments and ballistic fragments recovered from the edges of the tile are indistinguishable. Although the alumina and boron carbide fragments generated from areas closer to the point of impact were also similar, the silicon carbide fragments showed an increase in porosity with respect to the fragments from further away and from biaxial testing. This porosity was found to result from the loss of a boron-rich second phase, which was widespread elsewhere in the material, although the relevance of this to ballistic performance needs further investigation. The technique developed in this work will help facilitate such studies.