60140
Enhancing NiTi Implants Through Binder Jetting: Microstructure, Impurity Control, and Post-Processing Optimization

Friday, May 10, 2024: 11:15 AM
Meeting Room I (Hotel Cascais Miragem)
Mr. Mohammad Pourshams , Department of Mechanical Engineering, University of Toledo, Toledo, OH
Mr. Timothee Cullaz , Department of Mechanical Engineering, University of Toledo, Toledo, OH
Mr. Pete Angelo Rocco , Department of Mechanical Engineering, University of Toledo, Toledo, OH
Dr. Behrang Poorganji , Department of Mechanical Engineering, University of Toledo, Toledo, OH
Prof. Mohammad Elahinia , Department of Mechanical Engineering, University of Toledo, Toledo, OH
This study presents a detailed exploration of nickel-titanium (NiTi) implant fabrication via the binder jetting additive manufacturing process, with a particular focus on microstructure refinement, impurity management, de-binding, sintering parameters, and post-processing techniques, notably hot isostatic pressing (HIP).

Motivated by the growing demand for cost-effective, intricately designed NiTi implants, this research investigates binder jetting as a promising alternative to conventional methods, such as laser powder bed fusion (L-PBF). Binder jetting offers several advantages, including the capacity to realize complex geometries, porous structure, and operate at lower temperatures, preserving NiTi's critical shape memory properties.

Addressing the management of impurities derived from binder materials, this research underscores the significance of stringent control measures, ensuring the achievement of biocompatible and mechanically robust NiTi implants.

Furthermore, this investigation delves into the optimization of de-binding and sintering processes, striving for the realization of the desired density, microstructure, and mechanical properties in the final NiTi implant. Post-processing techniques, particularly HIP, are evaluated for their influence on microstructure refinement, phase purity enhancement, and the resulting mechanical performance, with the overarching goal of elevating the quality of NiTi implants.

In conclusion, this study offers a comprehensive examination of binder jetting for NiTi implant production, addressing the unique challenges of microstructure control, impurity management, de-binding, sintering, and post-processing, with a specific focus on the pivotal role played by hot isostatic pressing. This research contributes valuable insights to the field of materials science and engineering, promising to facilitate the creation of high-quality, biocompatible NiTi implants for critical medical applications.

See more of: Additive Manufacturing of SMAs II
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