Flash Sintering Laboratory

Indian Institute of Technology, Patna



Our group focuses on flash sintering of ceramics. Flash sintering involves sintering of ceramic materials in few seconds at remarkably low furnace temperatures. This is achieved by applying electric field across the green bodies with a pair of electrodes. The unusually low processing temperatures and short sintering times has opened up a new era in ceramics manufacturing. The densification kinetics is so quick that no time is given for grain growth, and flash sintering give rise to 30% smaller grains compared to the conventionally sintered samples, hence, better mechanical properties. Flash sintering experiments are primarily characterized by a non-linear rise in the electrical conductivity of the ceramics. The otherwise insulting ceramics behaves like conductors in the state of flash. Our main aim is to understand the mechanism of flash sintering.

We not only use the technique of flash sintering for sintering, but also to synthesize new materials. We also perform the flash phenomena experiments on dense samples (single crystals and polycrystal) where there is no sintering effect, to understand the structural changes introduced inside the material during the flash phenomena. In addition to flash sintering, our group also works on friction surfacing, where we try to repair surface cracks on engineering components, so that the same component can be put to service once again. By this way we can enhance the service life of components and structures. Here we work on the concept of “repair over replace” We study the structure-property correlation in detail through diffraction and microscopy based techniques.

Research Facilities

Muffle Furnace (upto 1600°C)
Melting Furnace (upto 1200°C)
Hydroulic press (5 tonn capacity)
ATS Tubular Furnace (upto 1200°C)
Glassman Power Supply (2000 V)
Sorensen Power supply (300 V)
Keithley DMM 6500
Vicker Hardness Tester (capacity 1 kgf - 50 kgf)
Vicker Hardness Tester (capacity 0.1 kgf - 1 kgf)
Flash sintering setup
Ants Horizontal Tubular Furnace (upto 1200°C)
Ants Vertical Tubular Furnace (upto 1600°C)
AvaSpec-spectrometer, met fiber

National collaborators

Dr. Sandip Ghosh Chowdhury
University : CSIR - National Metallurgical Labrotary
Designation: Chief Scientist
Dr. Tamoghna Chakrabarti
University: Indian Institute of Technology Patna
Designation: Assistant Professor
Dr. Ajeet K. Srivastav
University: Visvesvaraya National Institute of Technology Nagpur
Designation: Assistant Professor
Dr. Mangesh Lodhe
University: National Institute of Technology Bhopal
Designation: Assistant Professor
Dr. Niraj Mohan Chawake
University: Indian Institute of Technology Kanpur
Designation: Assistant Professor
Dr. Shikhar Krishn Jha
University: Indian Institute of Technology Kanpur
Designation: Assistant Professor

International collaborators

Prof. Rishi Raj
Country: USA
University: University of Colorado at Boulder
Designation: Professor
Dr. Sanjit Ghose
Country: USA
University: Brookhaven National Laboratory
Designation: Beamline Scientist
Prof. Olivier Guillon
Country: Germany
University: Forschungszentrum Jülich
Designation: Director
Prof. Dr. M.J. Hoffmann
Country: Germany
University: Karlsruhe Institute of Technology
Designation: Director
Dr. Xavier Vendrell
Country: Spain
University: Universitat de Barcelona
Designation: Director
Prof. Dr. rer. nat. Leopoldo Molina-Luna
Country: Germany
University: Technische Universitat Darmstadt
Designation: Professor