Integrated system for in situ study of ceramic sintering mechanism and mechanical properties
Abstract
An integrated spectroscopy and thermal emission measurement system for the real time monitoring of flash sintering, spark plasma sintering (SPS) and high temperature mechanical testing is requested. This unique system will integrate both the optical spectrometer over a broad wavelength (200-2000 nm in wavelength) and the high speed thermal emission imaging tool in all temperature range (RT-2500oC) with flash sintering tool and high temperature mechanical testing tool. These new in situ characterization tools are critical in revealing the signature emission spectrum and temperature change and distribution in the ceramic samples during sintering andhigh temperature mechanical testing. The data obtained are key to understand the fundamental mechanisms of flash sintering mechanisms and to address many of the unanswered scientific questions and long term debates. The unique capabilities of the requested new integrated system are: (1) real time imaging and temperature measurements (continuous temperature monitoringand imaging from room temperature to 2500oC) during flash sintering and SPS, as well as high temperature tensile/compression test; The continuous temperature measurement was enabled by the unique high speed rotational filter design with the semiconductor detector; (2) real time collection of emission spectrum of the ceramics during sintering to capture the signature emission spectrum from non-equilibrium defects and bandgap tuning due to field assisted sintering process; (3) well integrated thermal imaging camera and spectrometer measurement tool with flexible designs can be easily adopted with existing tools; (4) in situ high temperature tensile/compression stage coupled with SEM or the new thermal imaging tool will be able to monitor the microstructural evolution and temperature gradient of the ceramic specimens. These tools present as a very unique in situ tool combination that addresses the key scientific questions for the currently funded ONR project with joint efforts from Purdue University, Rutgers University, UC Davis andNaval Research Lab. The tool will also benefit many other research projects funded by DOD agencies and other federal funded projects at Purdue. More specifically, the integrated tools will be shared among MSE faculty and students for critical ceramic sintering mechanism study and in situ high temperature tensile/compression test of ceramics. The new tools will provide hands-on experiences to all the graduate and undergraduate students; and assist in the classroom teaching and outreach programs to undergraduates and graduates at Purdue University and a much broader audience.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 20, 2020
- Source ID
- N000142012659
Entities
People
- Haiyan Wang
Organizations
- Office of Naval Research
- United States Navy
- University of Virginia