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，这是在具有还原气体的等离子体支持的流态化床中进行的。在第一个资助期，对直接脱氧的铜粉进行了粉末流态化、等离子体发生器与流态化床的耦合等工艺方面的研究。在第二个资助期，将研究钛和钛合金等对氧亲和力较高的颗粒的脱氧，以及脱氧粉的处理。此外，重点研究了二氧化硅或钛纳米颗粒的掺杂对流动性的影响，以及可能的自催化脱氧作用。

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.