Type of research: basic Duration from: 01/01/91. to 12/31/95. Papers on project (total): 53
Papers on project quoted in Current Contents: 15
Institution name: Prirodoslovno-matematički fakultet, Prirodoslovni odjeli, Zagreb (119) Department/Institute: Department of Physics Address: Bijenička cesta 32, pošt. pret. 162 City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)41 432-480
Fax: 385 (0)41 432-525
Phone: 385 (0)1 4555-730
Fax: 385 (0)1 432-525
E-mail: STUBICAR phy.hr
E-mail: STUBI¬AR@phy.hr
E-mail: STUBI¬AR@phy.hr
E-mail: Stubicar@phy.hr
Summary: During the five-years period from Jan.1, 1991 to Dec.31,
1995 (i.e. the passed 22 researcher-years time) we have been active in
almost all subjects of research in accordance to our Proposal of the
project. Moreover, we perfomed some additional work in connection to the
mentioned ones because the results obtained were promising and worthwhile.
Thus, during the above mentioned period 32 scientific papers have been
prepared: 19 of them have been published in different journals, 9 of them
appeared in different conference Proceedings, 4 of them have been submitted
recently for publication in journals, and 2 are stil in preparation forms.
Also, we attended to 14 various scientific meetings with contributions
dealing with a similar subjects as those described in published papers. We
would like to note here that we applied for 2 patents at the Bureau of
Patents of the Republic of Croatia, and within the framework of this
project 2 B.Sc. theses were defended at the Faculty of Science.The topics
of our research (and efforts we made) were consisted of the theoretical
studies and experimental work (laboratory realization of experimental
conditions) which could lead to realization of the new materials having
such properties to be suitable for applications in various high-tech
engineering fields, as well as to be able to exploit these materials also
for production of various items in our factories such as: TEŽ, INKER, TEP,
SINTAL, etc. In this sense we are continuing to be active to enforce our
future collaboration with them expecting to make in future the joint
research projects. At present time this has been done within the lecture
course "Materials Science", which has been given at the Faculty of Science
by the principal investigator of this Project. The prevailing parts of
research performed were based on the study of changes of: structural,
mechanical and other properties of the chosen materials (e.g. powders of
purealuminium oxides and hydroxides, and some zeolites; as well as some
powder mixtures such as B-W, ZrO2-Y2O3-MgO, etc.) by applying the
high-energy ball-mill processing. Particular attention we have paid to the
research in which we revealed the microstructural properties of some high
Tc superconducting ceramics and hard metals. Also, we have widen our
knowledge and we have got more experience in preparation of coatings in
forms of thin or thick metal or ceramic films via magnetron sputtering and
laser processing techniques available in Zagreb. In future we want to
extend our research group (including at least 2 new researchers) to be able
to investigate more broad subjects. Namely, beside phenomena such as
superconductivity, superplasticyty, etc. we would like to cover also
investigationsrelated to the "shape memory" effect, superionic
conductivityand the other interesting phenomena. Namely, it is truth
thatthese and similar phenomena have been exploited very often these days
in new developing techniques and advanced technologies.
Keywords: processing of materials for advanced technologies, powders, manufacturing (preparation) of powders, compaction of powders, consolidation of powders, sintering of powders, structural changes, phase transformations (transitions), microstructural properties, mechanical properties, superplasticity, superconductivity, thermal properties, mechanochemical treatment, thermal treatment, quenching, annealing, high-energy ball-mill processing, manufacturing of powders via precipitation, rotating electric arc, amorphization, crystallization, precipitation, modification of surface by laser treatment, coatings prepared by magnetron sputtering.
Research goals: Recent development (and various topics) in materials
science research, and the technologies based on them, strongly confirm
our predictions relating to the possibilities of industrial production and
manufacturing of various items starting by powder materials (pure or
mixtures). Simultaneously, they confirm the second of our predictions
relating to prevalence (prestige) of the powder technologies in comparison
to the other conventional technologies: with respect to the quality and
the price of the final product. In this respect our optimistic
expectations relating to this research project are thoroughly confirmed.
Namely, we have been successful in realization (with relatively cheap
equipments) of the experimental conditions necessary for the preparation
of new materials having optimal properties for various advanced
engineering applications. Since the elapsed project has been scheduled for
5-years period, we expect that in future the Ministry of Science and
Technology of the Republic of Croatia will support our planed future
project allowing continuation on the same or similar research project. In
this case the final results of our reseach will be even more interesting
and important for the advanced engineering applications of prepared
materials.
COOPERATION - PROJECTS
Name of project
: >/CI1-900670 International Scientific and
Technological Cooperation EC/Yugoslavia postdoctoral grants fellowship;
Title:"Properties of Advanced Materials: Preparation of Ultra Fine Powders
by the Ultrasonic Atomization and High Energy Ball Milling Methods" Name of institution: Commission of the European Communities,
Directorate General for Science, Research and Development, Joint Research
Centre DG XII/G-3,Rue de la Loi 200,B-1049 Brussel,Belgium;via
Max-Planck-Inst.of Metals Resarch,Powder Met.Labs,Stuttgart City: Brussels(Stuttgart), Belgium(Germany) Other information about the project.