Session: 16-01-01: Government Agency Student Poster Competition

Paper Number: 149905

149905 - Vibration-Assisted Magnetron Sputtering: A Novel Approach for High-Purity Core-Shell Particle Synthesis With Tailored Properties 

Core-shell particles have received significant attention in materials science and engineering due to their unique properties and diverse applications. Traditionally, these particles are synthesized using wet chemistry techniques, often resulting in unwanted by-products and impurities that can compromise the particles' performance and limit their potential uses. To address this challenge, our research explores an innovative approach to core-shell particle production using vibration-assisted magnetron sputtering, aiming to achieve high-purity particles with precise control over shell features. The main objective of this study is to demonstrate the viability and advantages of vibration-assisted magnetron sputtering for creating core-shell particles with superior purity and tailored properties. This method represents a significant advancement in particle synthesis, offering the potential to overcome limitations associated with conventional wet chemistry techniques. By eliminating unwanted by-products and achieving greater control over particle composition and structure, this approach opens new possibilities for optimizing core-shell particles for specific applications. Our experimental methodology involves vibration-assisted magnetron sputtering to deposit copper shells onto titanium core particles. We employ a combination of advanced characterization techniques to gain insights into the nucleation and growth mechanisms of the sputtered copper shell. Focused ion beam (FIB) milling is used to prepare cross-sectional samples, which are then analyzed using high-resolution scanning electron microscopy (SEM) and transmission electron microscopy (TEM). These techniques allow for detailed examination of the shell microstructure, crystallography, thickness, and interface with the core particle. Preliminary results indicate that vibration-assisted magnetron sputtering produces high-purity core-shell particles with controllable shell characteristics. The copper shells exhibit uniform coverage and adherence to the titanium cores, with the ability to fine-tune shell thickness and microstructure by adjusting sputtering parameters. Electron microscopy analysis reveals the formation of a distinct core-shell interface and provides insights into the growth mechanisms of the copper shell. The knowledge gained from this study has significant implications for tailoring core-shell structures for various applications. By understanding the relationship between sputtering parameters and resulting particle properties, we can optimize core-shell particles for specific uses. For instance, precisely controlled shell thickness and composition in laser-based additive manufacturing can enhance material processability and final part properties. Tailored core-shell structures can improve densification behavior and mechanical properties in sintering applications. For corrosion resistance applications, optimized shell characteristics could enhance the core material's protection. Additionally, in biomedical fields, the ability to create high-purity core-shell particles with specific surface properties can improve biocompatibility and functionality. In conclusion, this research demonstrates the potential of vibration-assisted magnetron sputtering as a versatile and effective method for producing high-purity core-shell particles with tailored properties. The insights gained from this study pave the way for developing advanced materials with enhanced performance across a wide range of applications, from advanced manufacturing to biomedical engineering.

Presenting Author: Camilo Bedoya Lopez Virginia Commonwealth University

Presenting Author Biography: Camilo Bedoya holds a B.Sc. in Mechanical Engineering from the National University of Colombia. With extensive experience in advanced manufacturing processes, he has honed his skills in managing workshop and laboratory equipment and mastering material characterization techniques. Currently pursuing a Ph.D. in Mechanical and Nuclear Engineering at Virginia Commonwealth University, Camilo's research centers on surface modification and advanced sintering processes for aluminum, titanium, nickel, and copper alloy powders. His work aims to innovate and enhance material properties for semiconductors, aerospace, manufacturing, biomedical, and energy applications. Passionate about pushing the boundaries of materials science, Camilo is dedicated to developing cutting-edge solutions that address real-world challenges.

Authors:

Camilo Bedoya Lopez Virginia Commonwealth University
Carlos Castano Virginia Commonwealth University