XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
172
T1: P–39
Titanium – bioceramics sol-gel layer interface bond strength
investigation with mechanical testing and Raman spectroscopy
Małgorzata Lubas
1
, Jaroslaw Jasinski
2
, Lukasz Kurpaska
3
,
Elżbieta Długoń
4
, and Maciej Sitarz
4
1
Czestochowa University of Technology, Institute for Material Engineering, Av. Armii Krajowej 19,
42-200 Czestochowa, e-mail: lubas.malgorzata@wip.pcz.pl
2
Czestochowa University of Technology, Institute of Logistics and International Management, Av.
Armii Krajowej 19, 42-200, Czestochowa,
3
Materials Research Laboratory, National Center for Nuclear Research, Swierk-Otwock 05 -500
Poland
4
AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Av.
A.Mickiewicza 30, Krakow
The article presents the results of titanium 99.2 – bioceramics system interface bond strength
investigated with mechanical tests and Raman spectroscopy. Titanium substrate was prepared
with sand blasting (Al
2
O
3
) combined with sol-gel layer (ZrO
2
) and finally covered with low
fusing bioporcelain (Duceratin, GC Initial). In order to investigate the effects of metal-ceramics
interface bond strength, mechanical testing (three point bending) microscopic (SEM-EDS),
spectroscopic (RS) and (GID-XRD) were performed. Applied technique of substrate preparation
made it possible to improve the effects of porcelain adhesion to Ti 99.2 which was confirmed by
bond strength improvement in the area of titanium/bioceramic interface (about 40% in compare
to other bioceramics). Furthermore, the Raman spectroscopy showed results of phase
distribution change along the interface which proved the different character of metal-ceramic
chemical bonds which changed mildly from metallic to ionic covalent. Adequate interface bond
strength and phase composition of titanium/sol-gel – bioceramics system is essential to the
durability improvement of the dental implants and also influences in substrate functional
properties enhancement.
Keywords: metal-ceramic interface; sol-gel layer; three point bending; Raman spectroscopy
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
173
T1: P–40
Structural properties of zirconia – in-situ high temperature XRD
characterization
Lukasz Kurpaska
1
, Konrad Swierczek
2
, and Maciej Sitarz
3
1
Material Physics Department, National Centre for Nuclear Research, st. Andrzeja Soltana 7, 05-400
Otwock-Swierk, Poland, e-mail: lukasz.kurpaska@ncbj.gov.pl
2
Faculty of Energy and Fuels, AGH University of Science and Technology, av. A. Mickiewicza 30,
30-059 Krakow, Poland
3
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, av. A.
Mickiewicza 30, 30-059 Krakow, Poland
Zirconium and its alloys possess advantageous mechanical properties and corrosion
resistance, causing this metal to be a potential candidate for a new cladding material for IV
generation nuclear reactors [1]. However, working temperatures of new generation nuclear
reactors vastly exceed today’s current designs. Therefore, high temperature studies, mimicking
exact conditions of the reactor environment are badly needed. One of the biggest issues of
current zirconium corrosion is the phase identification of high temperature oxides. In addition to
these obstacles, one must remember about the difficulties with obtaining industrial alloy
specimens. Therefore, nuclear scientists study corrosion processes occurring on the pure
zirconium substrate and apply it to the standard industrial zirconium based alloy model [2–3].
In order to imitate reactor environment conditions, pure zirconium specimens were oxidized
at 500°C and structural properties were measured by using XRD technique. The measurement
were performed in in-situ conditions giving the opportunity to recorded signal during heating,
cooling and while oxidation took place. Conducted measurements allowed to study structural
properties of the developed zirconia being impacted by different sources of stresses, i.e: thermal
& growing. In this study the pure metal being a model for examination were used, as industrial
alloys are usually more difficult to obtain. It is known that X-ray diffraction is an accurate and
efficient tool allowing to identify the structure of a crystal, in which a beam of X-rays is
diffracted into specific directions by crystalline atoms. While investigating oxidized zirconium
layer, XRD provides data on which oxide phases are present, which is a vital knowledge as
properties of varying phases differ [4]. Shifts in diffractogram can additionally be a source of
information, for example they may be correlated with the amount of developed stress (thermal
and/or growing).
Keywords: zirconia; oxidation; structural properties
Acknowledgment
Financial support from Ministry of Science and Higher Education through “Young Scientist” programme
and Foundation for Polish Science through “HOMING PLUS” programme is gratefully acknowledged.
References
[1] S.J. Zinkle, G.S. Was, Acta Materialia 61 (2013) 735.
[2] L. Kurpaska, J. Favergeon, L. Lahoche, G. Moulin, M. El-Marssi, J-M. Roelandt, Oxidation of Metals
79 (2013) 261.
[3] P. Barberis, T. Merle-Mejean, P. Quintard, J. Nucl. Mater. 246 (1996) 23.
[4] P. Bouvier, Ph.D Thesis, Institute National Politechnique de Gronoble, 2000.
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