研究所定于2019年12月10日下午3:00，在我所K18-509会议室，举行学术交流会议，邀请加拿大舍布鲁克大学Francois Gitzhofer教授作学术报告《New developments in suspension plasma synthesis of materials》。
Processes are limited by materials availability and it is of the highest importance to have access to tools to develop very fast new materials compositions or phases or micro and nano architectures. Plasma technology is a powerful technology as it is an ultimate chemical reactor where equilibrium can be reached at the gas phase in milliseconds and by controlling the materials injection, the plasma chemistry as well as the quenching of the synthesized materials a lot of different compositions can be produced essentially limited by our imagination.
In this presentation, Prof. Gitzhofer will describe how suspension plasma technology can be a flexible tool in the field of exotic alloys synthesis (Al-Mo or Ni-Al-Mo). The difficulty with Al and Mo is that the boiling point of Aluminum is lower than the melting point of Molybdenum. The second field of application of the suspension plasma technology is for Baryum Magnesium Tantalum Oxide coatings synthesis (melting temperature is 3000°C) in the field of super high performance thermal barriers coatings for applications in the next generation high power density turbine engines. By controlling the injection size of the droplets it is possible to affect the microstructure and produce even columnar grain growth. The feed rate as well as the substrate roughness are also important variables to take into account for getting the desired coating architecture.