Hydroxyapatite is a very attractive material for artificial implants and human tissue restorations because they accelerate bone growth around the implant. The hydroxyapatite nanocomposites (HAp/TiO2) were produced by using high energy ball milling. X-ray diffraction studies revealed the formation of HAp and TiO2 composites. Cubic-like crystals with boundary morphologies were observed; it was also found that the grain size gradually increased with the increase in TiO2 content. It was found that the mechanical properties (hardness, Young's modulus, fracture toughness, flexural strength, and compression strength)of the composites significantly improved with the addition of TiO2, which was sintered at 1200℃. These properties were then also correlated with the microstructure of the composites. This paper investigates the effect of titania (TiO2 = 0, 5, 10, 15, 20, and 25 wt%) addition on the microstructure and mechanical properties of hydroxyapatite (Ca10(PO4)6(OH)2) nanocomposites.

中文翻译：

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HAp/TiO2 纳米复合材料：TiO2 对微观结构和机械性能的影响

羟基磷灰石是一种非常有吸引力的人造植入物和人体组织修复材料，因为它们可以加速植入物周围的骨骼生长。羟基磷灰石纳米复合材料（HAp/TiO2）是通过使用高能球磨生产的。X 射线衍射研究揭示了 HAp 和 TiO2 复合材料的形成。观察到具有边界形貌的类立方晶体；还发现随着 TiO2 含量的增加，晶粒尺寸逐渐增大。发现加入TiO2后，复合材料的力学性能（硬度、杨氏模量、断裂韧性、弯曲强度和压缩强度）显着提高，TiO2在1200℃烧结。这些特性还与复合材料的微观结构相关。本文研究了二氧化钛 (TiO2 = 0,