Transparent Ceramics Research Center, SICCAS
Key Laboratory of Transparent Opto-fuctional Inorganic Materials, CAS
Flash Spark Plasma Sintering for ultra-rapid consolidation of ceramics
Prof. Salvatore Grasso
Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
Abstract: During the past five years we developed a novel sintering technique called Flash Spark Plasma Sintering (FSPS) which is particularly suitable for the ultra-rapid (a few seconds) consolidation of UHTCs. As in the case of incandescent lamps, flash sintering techniques use localized Joule heating developed within the consolidating particles using typically a die-less configuration. Heating rates are extreme (104–106 °C/min), and the sintering temperature is therefore reached extremely rapidly. The research covered mostly metallic conductors (ZrB2, HfB2,TiB2) and semiconductors (B4C, SiC and their composites). The talk will summarize the joint XMat team efforts to:
-Identify the FSPS consolidation mechanism using modelling and transmission electron microscopy,
-Characterize the structural properties for the bulk materials and redefine the structure-property relationships of FSPSed materials
- Use FSPS processing to achieve unique materials by developing metastable phases and promote recrystallization to produce nanostructured materials. FSPS also allows to control point (vacancy and interstitials), linear (dislocations), planar (grain boundaries) and volume (secondary phases) defects.
Dr. Salvatore Grasso is a full professor at Southwest Jiaotong University (Chengdu China). His doctoral work (2008-2011) at the University of Tsukuba-NIMS (National Institute for material Science, Japan) was focused on Spark Plasma Sintering (SPS) and other Electric Current Assisted Sintering Techniques. While at Queen Mary University of London he pioneered the development of Flash Spark plasma Sintering techniques and he set up a facility for processing materials in strong magnetic fields (15 Tesla). His research focuses on the development of advanced ceramics using novel processing techniques assisted by electric and magnetic fields.