Body armor is a very critical entity in protecting soldier's live. Soldiers carry heavy stuff on duties, and the ceramic insert in those body armors is one of them. The purpose of this paper is to investigate the effect of Nano-rare-earth elements as additives to the ceramic base material on the armor's performance. Aluminum oxide (Al₂O₃) has been selected as the base material of the ceramic in this study. This study has chosen two additives: Zirconium dioxide (ZrO₂) and Nano-ceramic lab composite (NCLC). In this work, we have presented results of mechanical characterization for alumina-nanocomposites armor plates. Three different concentrations of NCLC and ZnO₂ alumina-based compositions have been prepared and pressed at 40 and 50 MPa and sintered at 1350^°C for 120 min. X-ray diffraction and scanning electron microscopy (SEM) techniques have been employed to characterize structural, morphological, and phase identification of the films. Mohs test hardness measurements of samples after sintering have been performed. Results have shown that the compositions with NCLC showed a higher hardness than a composition with ZrO₂. This result has indicated that the addition of NCLC to Alumina enhances the microstructure and increases the ceramics' hardness.

中文翻译：

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研究纳米稀土元素添加对防弹衣陶瓷硬度的影响

防弹衣是保护士兵生命的一个非常重要的实体。士兵在执行任务时携带重物，这些防弹衣中的陶瓷嵌件就是其中之一。本文的目的是研究纳米稀土元素作为陶瓷基材的添加剂对装甲性能的影响。本研究中选择氧化铝 (Al ₂ O ₃ ) 作为陶瓷的基材。本研究选择了两种添加剂：二氧化锆 (ZrO ₂ ) 和纳米陶瓷实验室复合材料 (NCLC)。在这项工作中，我们展示了氧化铝-纳米复合材料装甲板的机械表征结果。三种不同浓度的NCLC和ZnO ₂已制备氧化铝基组合物并在 40 和 50 MPa 下加压并在 1350 ^° C 下烧结120 分钟。X 射线衍射和扫描电子显微镜 (SEM) 技术已被用于表征薄膜的结构、形态和相识别。已对烧结后的样品进行莫氏硬度测试。结果表明，具有NCLC的组合物比具有ZrO ₂的组合物显示出更高的硬度。这一结果表明，在氧化铝中加入 NCLC 增强了微观结构并增加了陶瓷的硬度。