Deoxidation of gasborne powders (C02)

在无氧生产中使用金属粉末需要对颗粒表面进行完全和永久的脱氧，这在等离子体支持的流化床中使用还原性气体进行。在第一个资助期，研究了粉末的流态化和等离子体发生器与流化床的耦合等处理方面的铜粉，这些铜粉是直接脱氧的。在第二个资助期内，将研究对氧亲和力较高的颗粒（如钛和钛合金）的脱氧以及脱氧后粉末的处理。此外，重点研究了二氧化硅或钛纳米颗粒掺杂对其流动性的影响以及可能的脱氧自催化作用。

The use of metallic powders in oxygen-free production requires complete and permanent deoxidation of the particle surfaces, which takes place here in a plasma-supported fluidized bed with reducing gases. In the first funding period, processing aspects such as the fluidization of the powder and the coupling of the plasma generator with the fluidized bed were investigated on copper powders that are straightforward to deoxidize. In the second funding period, the deoxidation of particles with a higher affinity for oxygen, such as titanium and titanium alloys, and the handling of the deoxidized powder will be investigated. Moreover, the focus is on the effect of the doping with nanoparticles made of SiO2 or titanium on the flowability and possible autocatalytic effects on deoxidation.