The Academy of Sciences of the Czech rebublic - ASCR


Master's thesis of student Petr Králíček awarded Zvoníček Foundation

The diploma thesis of student Petr Králíček (FME CTU) placed second in the competition organized by Zvoníček Foundation, which awards the best graduate theses of the past academic year.

 
The thesis “Chromium and tungsten-chromium deposits by RF-ICP for nuclear fusion” was carried out at the Institute of Plasma Physics of the CAS under the supervision of Jan Čížek from the Department of Materials Engineering.
 
The thesis dealt with the innovation of protective coatings for use in thermonuclear reactors, currently designed from pure tungsten. However, due to its properties (especially the inability of surface passivation), pure W coatings would not suffice in the event of LOCA (loss of coolant) accident. For these cases, a concept has been introduced in this thesis where a proportion of chromium is added to the tungsten coatings, which could prevent the sputtering of activated material from the inner wall of the reactor by the passivation process. The work succeeded in fabricating demonstration W-Cr coatings of sufficient thickness and with good adhesion to the steel substrate, an initial step towards the planned optimization by post-processing.

 

Strategie AV21

Strategie AV21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Source: IPP.

9 Dec 2023