Vania Vassileva

20140506-36
Optical and Structural Investigations of WOx Thin Films Deposited by Electron Beam Evaporation Process
Katia Vutova, Vania Vassileva, Alexander Stoimenov, Elena Koleva, Tatyana Ivanova, Georgi Bodurov, Kostadinka Gesheva, Georgi Mladenov

Cite as:

Thin films of tungsten oxide are obtained at different technological parameters using electron beam evaporation process. Their optical and structure properties are investigated and the relation with process parameters is discussed. ...  read more

20140506-21
Electron Beam Melting and Recycling of Nickel
Vania Vassileva, Katia Vutova, Veliko Donchev, Alexander Stoimenov, Dinesh Amalnerkar, Nagegownivari Munirathnam

Cite as:

Experimental and theoretical investigations of the process parameters at electron beam melting and refining (EBMR) of nickel samples with the purpose of improving the composition of the performed ingots are presented and discussed. ...  read more

20180304-07
Trends in the development of cobalt production
Valeriya K. Kovacheva-Ninova, Georgi M. Savov, Vania Vassileva, Katia Vutova, Evgeni Petrov, Dobrin Petrov

Cite as:

Cobalt, as one of the “critical” and “strategically important” metals, plays a key role in the contemporary development of the world’s industry. Cobalt has specialized applications where it is currently impossible ...  read more

20160506-52
Obtaining of pure molybdenum through electron beam melting of scrap materials
Vania Vassileva, Katia Vutova, Maria Naplatanova, Nagegownivari Munirathnam, Dinesh Amalnerkar

Cite as:

Investigations are carried out applying electron beam melting method for obtaining of pure molybdenum from waste materials. The obtained results are presented and factors controlling the refining processes of metal impurities ...  read more