Georgi Mladenov

20140506-02
Numerical modeling of the plasma parameters, generated during electron beam welding
Dmitriy N. Trushnikov, Georgi M. Mladenov

Cite as:

It is described a model of plasma formation in the crater in liquid metal as well as above electron beam welding zone. Model is based on solution of two equations for density of electrons and mean electron energy. The mass ...  read more

20151112-01
Nanotechnology – the moving force of nowadays electronics, information technologies and telecommunications
Georgi M. Mladenov

Cite as:

Modern electronics devices and systems, computers and telecommunications are developing due to the achievements in nanotechnologies – a new scientific and applied field that uses the application of methods and techniques ...  read more

20160506-42
Resist characteristics simulation of HSQ electron beam resist
Anna Bencurova, Katia Vutova, Elena Koleva, Ivan Kostic, Anna Konecnikova, Adrian Ritomsky, Georgi Mladenov

Cite as:

Hydrogen Silsesquioxane (HSQ) is used as a high-resolution resist with resolution down below 10 nm half-pitch. High-contrast and high-resolution patterning in the negative electron beam HSQ resist has numerous potential applications. ...  read more

20160506-31
Emittance – quantitative characteristic of welding beam quality
Elena Koleva, Georgi Mladenov, Volodya Dzharov, Dimitar Todotov, Marin Kerdjiev, Lilyana Koleva

Cite as:

The management of the quality during electron beam welding directed to optimization of the process parameters is an important way to improve the use of the expensive equipment and to make the EBW process more efficient in consuming materials, time and energy.

 ...  read more

20160506-13
Characteristics of plasma generated during electron beam welding
Georgi M. Mladenov, Dmitriy N. Trushnikov, Elena G. Koleva, Vladimir Ya. Belenkiy

Cite as:

Electron beam is at the forefront of welding technology. The choice of optimal welding modes, monitoring the weld quality and/or detecting weld defects in real-time during the electron beam welding process using nondestructive, ...  read more

20160506-03
State of the arts of additive manufacturing by selective electron beam melting
Georgi Mladenov, Elena Koleva, Lilyana Koleva, Volodya Dzharov

Cite as:

In this paper the applications of electron beam additive manufacturing systems are reviewed. There by selective electron beam melting of welding wires or of some area of the upper powder layer of a sandwich structure, 2D soldered ...  read more

20170304-04
Model-based optimization of electron beam welding for obtaining defect-free welds
Elena Koleva, Lilyana Koleva, Georgi Mladenov

Cite as:

The optimization of welds obtained by electron beam welding is a multi-criterial task, involving the requirements for the geometrical characteristics of the welds, together with the fulfilment of the requirements for lack ...  read more