Publications by Lyubomira Veleva

Investigation of microstructure and mechanical properties of W-Y and W-Y2O3 materials fabricated by powder metallurgy method

W-2Y, W-1Y(2)O(3) and W-2Y(2)O(3) materials have been fabricated using two different powder metallurgy methods. While W-2Y and W-1Y(2)O(3) have been fabricated using mechanical alloying and hot isostatic pressing (Hipping), W-2Y(2)O(3) has been fabricated ...

Elsevier Sci Ltd2015

Recent progress in research on tungsten materials for nuclear fusion applications in Europe

Nadine Baluc, Ho Ling Li, Lyubomira Veleva, Antoine Cyril David Hoffmann

The current magnetic confinement nuclear fusion power reactor concepts going beyond ITER are based on assumptions about the availability of materials with extreme mechanical, heat, and neutron load capacity. In Europe, the development of such structural an ...

Elsevier Science Bv2013

A brief summary of the progress on the EFDA tungsten materials program

Nadine Baluc, Ho Ling Li, Lyubomira Veleva, Antoine Cyril David Hoffmann

The long-term objective of the European Fusion Development Agreement (EFDA) fusion materials programme is to develop structural and armor materials in combination with the necessary production and fabrication technologies for reactor concepts beyond the In ...

Elsevier Science Bv2013

Contribution to the Production and Characterization of W-Y, W-Y2O3 and W-TiC Materials for Fusion Reactors

Lyubomira Veleva

This PhD Thesis work was aimed at investigating the potentiality of tungsten-base materials as structural materials for the future thermonuclear fusion reactors in attempting to develop reduced activation tungsten-base materials with high strength and suff ...

EPFL2011

Processing and characterization of a W–2Y material for fusion power reactors

Nadine Baluc, Robin Schäublin, Lyubomira Veleva

A W-2Y material has been produced by powder metallurgy techniques including mechanical alloying of W and Y elemental powders in an argon atmosphere, followed by hot isostatic pressing of the milled powder at 1320 degrees C under a pressure of 200 MPa for 2 ...

Elsevier2011

From materials development to their test in IFMIF: an overview

Nadine Baluc, Minh Quang Tran, Robin Schäublin, Philippe Spätig, Zbigniew Oksiuta, Lyubomira Veleva, Nazar Ilchuk

R&D activities on fusion reactor materials in Switzerland focus on (1) the development of advanced metallic materials for structural applications in plasma-facing (first wall, divertor) and breeding blanket components of the future fusion power reactors, i ...

IOP Publishing Ltd2011

Review on the EFDA programme on tungsten materials technology and science

Nadine Baluc, Robin Schäublin, Lyubomira Veleva, Daniela Rupp

All the recent DEMO design studies for helium cooled divertors utilize tungsten materials and alloys, mainly due to their high temperature strength, good thermal conductivity, low erosion, and comparably low activation under neutron irradiation. The long-t ...

Elsevier2011

Sintering and characterization of W–Y and W–Y2O3 materials

Nadine Baluc, Zbigniew Oksiuta, Lyubomira Veleva

W-(0.3-2)Y2O3 and W-(0.3-2)Y materials (in wt.%) have been manufactured by conventional powder metallurgy methods including dry mechanical alloying of elemental powders in Ar atmosphere, cold pressing in air using a pressure in the range of 150-250 MPa and ...

Elsevier2009

Focused ion beam application on the investigation of tungsten-based materials for fusion application

Nadine Baluc, Robin Schäublin, Zbigniew Oksiuta, Amuthan Ramar, Lyubomira Veleva

Springer Verlag2008