Liquid-phase sintering is advantageous compared to solid-state sintering in manufacturing ceramic composites including lightweight armors. The crystalline phases formed from the liquid phase affect the mechanical properties of the material, and thus, to the best of our knowledge, their effect on the ballistic behavior need to be understood. In this paper, the correlation between mechanical properties and ballistic performance of non-stoichiometric cordierite-based glass-ceramic/alumina composites arrays with 99.8% purity was evaluated. The precursor alumina had average particle sizes of 0.5 and 1.7 μm, and the added glass-ceramic contents were 7 and 14 vol%. Cold-pressed samples were sintered under conditions of maximum densification. The behavior of each composition was compared with that of pure alumina with respect to sintering, mechanical properties, and ballistic performance evaluated by depth of penetration (DOP). For a single precursor alumina, decreases in ballistic resistance were observed with increases in the content of glass-ceramic due to the reduction in mechanical properties, specially hardness and Young's modulus (E). The overall analysis of the data indicated that ballistic behavior of alumina is more complex, and the toughness (K_IC) and hardness (HK) can be regarded as predictive properties for determining alumina ballistic performance in DOP test. It is demonstrated that glass-ceramic addition lead to lower sintering time and temperature, from 1670 °C for 5 h to 1570 °C for 0.5 h, and these compositions have the similar areal density of pure alumina regarding ballistic performance, with less than 4% difference between 1.7 μm pure alumina and the composition with 7 vol% glass-ceramic precursor addition.

与固态烧结相比，液相烧结在制造包括轻型铠装的陶瓷复合材料时具有优势。由液相形成的晶相会影响材料的机械性能，因此，就我们所知，它们对弹道行为的影响需要理解。在本文中，评估了纯度为99.8％的非化学计量堇青石基玻璃陶瓷/氧化铝复合材料阵列的力学性能与弹道性能之间的相关性。前体氧化铝的平均粒径为0.5和1.7μm，并且添加的玻璃陶瓷含量为7和14体积％。在最大致密化条件下烧结冷压样品。在烧结方面，将每种成分的行为与纯氧化铝的行为进行了比较，机械性能以及通过穿透深度（DOP）评估的弹道性能。对于单一的前体氧化铝，由于机械性能（特别是硬度和杨氏模量（E））的降低，随着玻璃陶瓷含量的增加，防弹性降低。数据的整体分析表明，氧化铝的弹道行为更为复杂，而韧性（K_IC（_IC）和硬度（HK）可以作为DOP测试中确定氧化铝弹道性能的预测属性。结果表明，玻璃陶瓷的加入可降低烧结时间和烧结温度，从1670°C持续5 h到1570°C持续0.5 h，就防弹性能而言，这些组合物具有相同的纯氧化铝面密度，小于4 1.7微米的纯氧化铝与添加了7体积％的玻璃陶瓷前体的组合物之间的百分比差异。