Grüger Lennart, Jensch Felix, Dittrich Fabian, Härtel Sebastian
Department Hybride Manufacturing, BTU Cottbus Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany.
Materials (Basel). 2024 Sep 23;17(18):4667. doi: 10.3390/ma17184667.
Within the scope of these investigations, the feasibility of a material bond between Ti-6Al-4V and the magnesium alloy AZ91 is analyzed. Ti-6Al-4V is frequently used for implants due to its biocompatibility, corrosion resistance, and specific strength. However, depending on the surface quality, the attachment behavior of the bone to the implant varies. Magnesium implants promote the regeneration of bone tissue and biodegrade as the bone tissue heals. Combining the properties of both materials in one implant enables a reduced implant volume and increased stability. For this reason, this study aims to demonstrate the feasibility of creating a material bond between the materials Ti-6Al-4V and AZ91. For this purpose, Ti-6Al-4V truncated cones and AZ91 sleeves were produced using the additive manufacturing process of laser powder bed fusion (L-PBF). The as-built sleeves were then pressed onto machined truncated cones. Since zinc serves as a lubricant and has good diffusion properties with the materials used as a result of heat treatment, a comparison was made between zinc-coated and the as-built Ti-6Al-4V samples. This showed that a bond was created after hot isostatic pressing and that the push-out force could be increased by more than 4.5 times. Consequently, a proof of feasibility was demonstrated, and a high potential for applications in medical technology was shown.
在这些研究范围内，分析了Ti-6Al-4V与镁合金AZ91之间形成材料结合的可行性。Ti-6Al-4V因其生物相容性、耐腐蚀性和比强度而常用于植入物。然而，根据表面质量的不同，骨与植入物的附着行为也有所差异。镁植入物可促进骨组织再生，并在骨组织愈合时发生生物降解。将两种材料的特性结合在一个植入物中，可以减小植入物体积并提高稳定性。因此，本研究旨在证明在Ti-6Al-4V和AZ91材料之间形成材料结合的可行性。为此，采用激光粉末床熔融（L-PBF）增材制造工艺制备了Ti-6Al-4V截头圆锥体和AZ91套筒。然后将制成的套筒压在加工好的截头圆锥体上。由于锌可作为润滑剂，并且经过热处理后与所用材料具有良好的扩散性能，因此对镀锌Ti-6Al-4V样品和制成的Ti-6Al-4V样品进行了比较。结果表明，在热等静压后形成了结合，并且推出力可提高4.5倍以上。因此，证明了可行性，并显示出在医疗技术中的应用潜力巨大。
