Powder Materials Processing and Fundamental Understanding: Poster Session
Sponsored by: TMS Materials Processing and Manufacturing Division, TMS: Powder Materials Committee
Program Organizers: Kathy Lu, University of Alabama Birmingham; Eugene Olevsky, San Diego State University; Hang Yu, Virginia Polytechnic Institute And State University; Ruigang Wang, Michigan State University; Isabella Van Rooyen, Pacific Northwest National Laboratory
Tuesday 5:30 PM
March 1, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center
Session Chair: Kathy Lu, University of Alabama Birmingham
J-47: Induction Sintering of Copper-chromium Powders at Low-pressure Environment: Santiago Vargas1; Gregory Hadley1; Diana Galeano1; Carlos Castano1; 1Virginia Commonwealth University
Copper-chromium pellets made from micro-size powders have been sintered in vacuum and nitrogen low pressure by a reliable and straightforward induction sintering setup. Several specimens compacted at 4 MPa and 10 MPa were sintered at different temperature cycles. This work presented the sintering furnace configuration, performance characterization while cross-linking the pellet dimensions and mass, densification, and hardness of the sintered specimen. The low-pressure environment offered a protective atmosphere for the sintering process. In addition, copper/chromium (core/shell) pellets were fabricated to compare under induction heating the phase formation at temperatures close to the eutectic composition of the studied materials.
Cancelled
J-48: Simutaneously Increasing the Thermoelectric and Mechanical Properties by Developing Harmonic Structure in Bi2Te3 Gas Atomized Powders: Pee-Yew Lee1; 1National Taiwan Ocean University
The harmonic structure with a hybrid structure composed of fine/course grain was obtained for Bi2Te3 gas atomized powders treated by high energy ball mill and spark plasma sintering. For the bulk samples sintered at temperature below 350℃, the microhardness of interconnected network of fine grain areas are higher than that of course grain surrounded by fine grain areas. The fine grains can increase the phonon scattering and result in a decrease in thermal conductivity. Conversely, the existence of course grain can provide a fast carrier transportation network, which can increase electrical conductivity. The combination of such specific behaviors thus can improve the thermoelectricity and enhance the ZT value of Bi2Te3 bulk sample. From above-mentioned results, it is clear that the simultaneous increasing of high thermoelectric performance and mechanical properties can be obtained by designed harmonic structure in Bi2Te3 alloy through ball milling and spark plasma sintering routes