Fused Deposition Modeling (FDM) is one of the most popular Additive Manufacturing (AM) techniques widely used in different fields, including the medical sector. FDM uses different thermoplastic polymers to fabricate the desired shapes. However, there is a need to enhance the mechanical properties of neat biopolymers with the help of reinforcements that can be used in medical applications. This work investigates the thermomechanical, physical, and biological properties of PLA-based composites fabricated using FDM. PLA-based bio-ceramics (Al₂O₃ and Yttria Stabilized Zirconia [YSZ]) filaments have been used to prepare tensile, compression, and flexural specimens. Scanning electron microscopy has been performed to reveal the fracture characteristics of the composite specimens. Besides this, the feasibility of the polymer composite for biomaterial applications has also been analyzed. The results show that PLA/Al₂O₃ has 30.44, 55.2, and 83.73 MPa tensile, compressive, and flexural strength, respectively. The present study also shows that the reinforcement of PLA with bioceramics also led to a reduction in wear and Coefficient Of Friction (COF) at varying loads.

中文翻译：

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用生物陶瓷（氧化铝和 YSZ 复合材料）增强聚乳酸及其生物医学应用的热机械和物理性能

熔融沉积建模 (FDM) 是最流行的增材制造 (AM) 技术之一，广泛应用于不同领域，包括医疗领域。FDM 使用不同的热塑性聚合物来制造所需的形状。然而，需要借助可用于医疗应用的增强材料来提高纯生物聚合物的机械性能。这项工作研究了使用 FDM 制造的 PLA 基复合材料的热机械、物理和生物特性。PLA基生物陶瓷（Al ₂ O ₃和氧化钇稳定氧化锆 [YSZ]) 长丝已用于制备拉伸、压缩和弯曲试样。已进行扫描电子显微镜以揭示复合试样的断裂特征。除此之外，还分析了聚合物复合材料在生物材料应用中的可行性。结果显示 PLA/Al ₂ O _{3 分别}具有 30.44、55.2 和 83.73 MPa 的拉伸、压缩和弯曲强度。本研究还表明，用生物陶瓷增强 PLA 还可以降低不同负载下的磨损和摩擦系数 (COF)。