Session: 17-01-01: Research Posters

Paper Number: 150714

150714 - Development of Paste Extrusion Apparatus for Additive Manufacturing of Transverse Thermoelectric Structures 

 Additive manufacturing (AM) is transforming the field of material fabrication, offering unmatched capabilities in designing complex geometric structures, enabling mold-free production, and ensuring efficient material utilization. This study presents a sophisticated dual-nozzle metal 3D printer specifically engineered for the direct manufacturing of composite structures comprising dissimilar materials. By leveraging advanced AM techniques such as Direct Ink Writing (DIW) for high-volume fraction pastes, this research addresses and overcomes the geometric constraints inherent in traditional manufacturing methods.

The focus of this study is on the precise mixing and positioning of materials like zinc oxide and copper, chosen for their known thermoelectric and electrical properties. These materials are critical for developing high-performance transverse thermoelectric composite structures. The innovative 3D printing process developed in this study not only enhances the manufacturing workflow but also produces highly customized, efficient composite structures.

Traditional manufacturing methods for creating transverse thermoelectric materials often involve complex and costly processes such as machining and soldering, which pose significant challenges in terms of equipment costs and process control. By employing the dual-nozzle 3D printing technique, this study demonstrates a significant reduction in these challenges. The method allows for the seamless integration of different materials in a single printing cycle, ensuring precise control over the material properties and the overall structure of the composite. This capability is particularly advantageous for creating multifunctional energy harvesting devices that require a high degree of customization and performance optimization.

The potential applications of the advanced composite materials produced through this novel 3D printing process are vast. In the realm of sustainable energy solutions, these materials can be used to develop efficient energy harvesting devices that convert waste heat into usable electrical energy. This is particularly relevant in industrial settings where large amounts of waste heat are generated. Additionally, the aerospace industry can benefit from these materials due to their lightweight and high-efficiency characteristics, which are essential for high-performance aerospace components.

Furthermore, the strategic use of AM in creating these sophisticated structures allows for the manipulation of microstructural characteristics The ability to integrate multiple functionalities within a single print cycle also opens up new possibilities for the development of next-generation energy devices that combine energy harvesting, storage, and management capabilities in one compact system.

This study marks a significant advancement in the use of AM for critical energy applications and beyond. By overcoming the limitations of traditional manufacturing methods and demonstrating the capabilities of a dual-nozzle 3D printing technique, it sets the stage for future innovations in the field of thermoelectric materials and composite structures. The results of this research highlight the transformative potential of AM in developing high-performance, multifunctional materials that can meet the demands of modern energy and aerospace applications.

Presenting Author: Weixiao Gao Temple University

Presenting Author Biography: Weixiao Gao is a PhD student at Temple University, currently pursuing a degree in Mechanical Engineering. Working under the guidance of Dr. Fei Ren in his laboratory, Weixiao focuses primarily on 3D printing technologies for metals and ceramics. His research also extends to the application of 3D printing in the development of thermoelectric materials, exploring innovative methods to enhance their performance and efficiency.

Authors:

Weixiao Gao Temple University
Fei Ren Temple University