3D printed silicon nitride, alumina, and hydroxyapatite ceramic reinforced Ti6Al4V composites - Tailored microstructures to enhance bio-tribo-corrosion and antibacterial properties
3D printed silicon nitride, alumina, and hydroxyapatite ceramic reinforced Ti6Al4V composites - Tailored microstructures to enhance bio-tribo-corrosion and antibacterial properties
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3D 打印氮化硅、氧化铝和羟基磷灰石陶瓷增强 Ti6Al4V 复合材料 - 定制的微观结构可增强生物摩擦腐蚀和抗菌性能
DOI：
10.1016/j.jmbbm.2023.105973
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发表时间：
2023
影响因子：
3.9
通讯作者：
Bandyopadhyay, Amit
中科院分区：
文献类型：
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作者：
Afrouzian, Ali;Bandyopadhyay, Amit
本研究利用定向能量沉积（DED）作为金属增材制造（AM）技术，以创建陶瓷增强的Ti6 Al 4V（Ti64）与羟基磷灰石（HA），氧化铝（Al 2 O3）和氮化硅（Si 3 N4）的复合材料。由此产生的复合材料具有定制的微结构，旨在同时改善生物摩擦学和抗菌性能。在四种不同的复合材料中，在Ti 64中使用总共5wt%的陶瓷增强体-（1）仅Si_3N_4（5S），（2）仅Al_2O_3（5A），（3）3wt%Si_3N_4和2wt%HA（32 SH）和（4）3wt%Al_2O_3和2wt%HA（32AH）。显微组织观察表明，复合材料中α-Ti和β-Ti之间发生马氏体相变，导致基体产生残余压应力。在陶瓷颗粒和Ti64基质之间观察到内聚性，防止开裂、脱粘或孔隙。复合材料试样的维氏硬度比Ti64基体提高了50%。详细讨论了各种强化机制，代表了5S和5A复合材料中复合磨损减少的原因。添加Si 3 N4的复合材料表现出对革兰氏阳性金黄色葡萄球菌的抗菌反应。陶瓷增强Ti64复合材料的多功能性能使其适用于关节生物医学器械，如髋关节植入物中的股骨头。
This study utilized directed energy deposition (DED) as a metal additive manufacturing (AM) technique to create ceramic-reinforced composites of Ti6Al4V (Ti64) with hydroxyapatite (HA), alumina (Al2O3), and silicon nitride (Si3N4). The resulting composites had tailored microstructures designed to improve bio-tribological and antibacterial properties simultaneously. A total of 5-wt % ceramic reinforcement were used in Ti64 in four different composites – (1) only Si3N4(5S), (2) only Al2O3(5A), (3) 3 wt % Si3N4and 2 wt% HA (32SH) and (4) 3 wt % Al2O3and 2 wt% HA (32AH). Microstructural observations revealed that martensite transformation between α and β-Ti in composites resulted in compressive residual stress at the matrix. Coherency is observed between the ceramic particles and Ti64 matrix, preventing cracking, debonding, or porosity. Vicker's hardness of the composite samples increases by 50% over the Ti64 matrix. Various strengthening mechanisms are discussed in detail, representing the reason behind the reduction of compound wear in 5S and 5A composites. Si3N4-added composites demonstrated an antibacterial response against gram-positiveStaphylococcus aureus. The multifunctional performance of ceramic-reinforced Ti64 composites makes them suitable for articulating biomedical devices such as femoral heads in hip implants.