material-science-2018-keynote

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July 23-25, 2018 | Moscow, Russia

Materials Science and Engineering

International Conference on

Journal of Materials Science and Nanotechnology | Volume 2

t has been studied a porous ceramic obtained from

nanopowders obtained by plasma spray technique. The

porosity of ceramic was 5 - 75 %. The aim of the work is

the investigation of densification, structure and mechanical

properties of materials based on zirconia-based powders

produced by plasma spray synthesis and sintered at different

temperatures. It has been shown that structure of the sintered

ceramic has a systemof cell and rod elements. These structures

formed by stacking hollow powder particles. There were three

types of pores in ceramics: large cellular hollow spaces, small

interparticle pores which are not filled with powder particles

and the smallest pores in the shells of cells. The cells generally

did not have regular shapes.The size of the interior of the cells

many times exceeded the thickness of the walls which was a

single-layer packing grains. The increase of the pore space in

the ceramics was accompanied by the decrease of the average

size of voids inside the cells and the average grain size.The

stress-strain diagrams for ceramics with porosity higher than

20 % are non-liner, and sintered ceramic with a high porosity

has a very similar behavior as compare with natural bone and

can be used as perspective material for bone replacement.

Speaker Biography

Sergei Kulkov received his Ph.D. degree from Tomsk State University in 1981 and

doctoral degree in 1990 from Institute of Strength Physics and Material Sciences of

Russian Academy of Sciences. From 1981 to till today, he worked firstly as researcher

and head of ceramic composites laboratory in ISPMS RAS and from1992 as a professor

and from 2000 as head of department in Tomsk State University. His current research

interests include synthesis and mechanical properties of MMC and CMC with phase

transformations and the development of functional materials for different applications.

Sergei Kulkov

Tomsk State University, Russia

Zirconia / Alumina ceramics with cellular structure for Biomedical applications