A paper written by Reid Carazzone, a fifth-year doctoral student in materials science and nanoengineering
(MSNE) at Rice University, has been selected as one of the best papers published in 2018 in the Journal of the American Ceramic Society.
Fifteen papers out of the more than 800 published in the journal last year are being honored. Carazzone was the lead author of “In situ observations of cracking in constrained sintering,” which was published last June.
“Reid has exceptional focus, is incredibly independent and is an excellent manager. What sets him apart from other researchers is his attention to detail. This is highlighted in the article because developing our experimental apparatus required fine-tuning the imaging setup as well as the powder-processing procedure,” said Carazzone’s adviser, Zachary Cordero, assistant professor of MSNE and director of the Additives Lab at Rice.
Carazzone’s co-authors are Cordero, Rice alumnus Michael D. Bonar ’18, and two Rice undergraduates, Henry W. Baring, a junior in MSNE, and Mark A. Cantu, a sophomore in MSNE. Bonar, Baring, and Cantu aided in setting up the experiments, characterizing the samples and analyzing the data.
For the first time, Carazzone, Cordero and the others directly observed the development of cracks in sintering powder aggregates. Ceramics and similar substances are fabricated when a powder aggregate is made dense using a high-temperature treatment called sintering.
Such components commonly crack during the process but the precise mechanism has not been understood. Carazzone and co-workers used 3D printing to create powder aggregates with a tensile fracture geometry, then imaged them as they were sintered. The experiments revealed several features of the fracture process, including the aggregate slowly tearing itself apart in a ductile manner. The results suggest that sinter-cracking may be described using classical fracture mechanics.
Carazzone and his co-authors are invited to participate in the Journal of the American Ceramic Society awards symposium at MS&T (Materials Science and Technology) 2019, to be held Sept. 29-Oct. 3 in Portland, Oregon.