The ballistic impact performance of nanocrystalline zirconia-toughened alumina (nZTA) and alumina ceramics
The ballistic impact performance of nanocrystalline zirconia-toughened alumina (nZTA) and alumina ceramics
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DOI：
10.1016/j.jeurceramsoc.2020.09.068
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发表时间：
2021-02
影响因子：
5.7
通讯作者：
Y. Wade-Zhu;J. Wade-Zhu;H. Wu;J. Binner;B. Vaidhyanathan
中科院分区：
文献类型：
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作者：
Y. Wade-Zhu;J. Wade-Zhu;H. Wu;J. Binner;B. Vaidhyanathan
纳米氧化锆增韧氧化铝（nZTA）陶瓷（在亚微米氧化铝基体中含有15%的纳米氧化钇稳定氧化锆）的弹道冲击性能已经通过深度穿透试验进行了研究，并与单片氧化铝的结果进行了比较。通过将穿透深度结果与陶瓷靶材厚度拟合，评估了每种材料的穿透阻力。这些结果表明，尽管nZTA的微拉曼分析证实了经典的四方向单斜氧化锆相变的发生，但与单片氧化铝相比，nZTA陶瓷在抗穿透性方面没有任何好处。使用Cr3+/ al2o3荧光光谱分析生成的碎片表明，nZTA和氧化铝都经历了相似的塑性变形量，作为碎片尺寸的函数，更细的碎片（<150 μm）比更粗的碎片（>150 μm）表现出更大的塑性变形。这些结果分别通过断裂表面观察和地下位错分析得到了验证。
The ballistic impact performance of nanocrystalline zirconia-toughened alumina (nZTA) ceramics, comprising 15 wt% nano-yttria-stabilised zirconia in a sub-micron alumina matrix, have been studied through depth of penetration tests and compared to the results for monolithic alumina. The penetration resistance of each material was evaluated by fitting the penetration depth results against the thickness of the ceramic targets. These results show that, despite micro-Raman analysis of the nZTA confirming the occurrence of the classic tetragonal-to-monoclinic zirconia phase transformation, nZTA ceramics provide no benefit with respects to penetration resistance compared to monolithic alumina. Analysis of the fragments generated using Cr3+/Al2O3fluorescence spectroscopy shows that both the nZTA and alumina experience similar amounts of plastic deformation as a function of fragment size, with finer fragments (<150 μm) exhibiting more plastic deformation than coarser fragments (>150 μm). These results are validated through fracture surface observations and subsurface dislocation analysis using SEM and TEM respectively.