COVER

TITUL

NEW IRON OXIDES/HYDROXIDES BIOMATERIALS FOR APPLICATION IN ELECTRONICS AND MEDICINE
Prof. Nedkov I. , Prof. Groudeva V., M.Sc. Angelova R., PhD Iliev M 2, PhD Slavov L. ... 4

CHARACTER OF ANISOTROPY AND ELASTIC PROPERTIES OF HOT-FORGED ALUMINUM-MATRIX COMPOSITES PRODUCED BY DIFFERENT PRODUCTION MODES
Prof., Dr. Sc. Bagliuk G.А., Prof., Dr. Sc. Bezimyanniy Yu.G., M.Sc. Talko О.V., M.Sc. Теslеnkо L.О., M.Sc. Shishkina Yu.А. ... 8

THERMAL EXPANSION OF SOLIDS: RECENT RESEARCH AND STANDARD MATERIALS
Dr.Sc. T. Kompan ... 13

THE INFLUENCE OF WELDING TIME ON MECHANICAL PROPERTIES OF RESISTANCE SPOT WELDED TWIP STEEL SHEETS
Hakan Aydin, Mumin Tutar, Ali Bayram ... 16

CORROSION PROPERTIES OF COMMERCIALLY PURE TITANIUM DEPENDING ON THE MICROSTRUCTURE AND SURFACE TREATMENT METHOD
Lead. Res., Dr. Semenov V.I., Prof., Dr. Huang S.-J., Jun. Res. Valiev R.R., Sen. Res., Dr. Ramazanov K.N., Mast. Chou T.-Y. .. 20

EFFECT OF METAL PHASE COMPOSITION ON MECHANICAL AND TRIBOLOGICAL PROPERTIES OF Fe-GLASS COMPOSITES
Prof., Dr. Sc. Bagliuk G.А., Eng. Kuruvskyi V.,
Eng. Kostenko O. ... 23

POLYESTER/SILICATE COMPOSITES
Assoc. Prof. Cherkezova R. PhD., Assoc. Prof. Radenkov Ph. PhD., Asst. Prof. Zafirova K., Assoc. Prof. Popov A. PhD.,
Asst. Prof. Hristova Т. PhD., Assoc. Prof. Radenkov M. PhD., Senior Asst. Prof. Todorov N. PhD. ... 29

EFFECTS OF MECHANICAL ALLOYING TIME AND ANNEALING TEMPERATURE ON THE PHYSICAL PROPERTIES OF Al - WC COMPOSITE POWDERS
M.Sc. Şelte A., Assoc. Prof. Dr. Özkal B. ... 33

POWDER STATE CHARACTERIZATION OF ZnO/C and NiO/C COMPOSITE NANOPOWDERS SYNTHESIZED VIA SPRAY DRYING SUBSEQUENT THERMAL DECOMPOSITION
M.Sc. Duman Ş., Assoc. Prof. Dr. Özkal B. ... 36

A COMPARISON OF FRICTION CHARACTERISTICS OF VARIOUS SURFACE TREATED HOT WORK TOOL STEEL
Phd Student Tutar M., Prof. Dr. Bayram A. ... 40

SPARK PLASMA SINTERING OF β-SiAlON–BN COMPOSITES
Nefedova E., Ph.D. Grigoryev E., Fokin D1, Ph.D. Smirnov K. ... 43

EVALUATION OF FATIGUE LIMIT FOR ALUMINIUM ALLOYS BY ULTRASONIC MEASURING
MSc.Eng..Georgy Dobrev, Ass.Prof,PhD.,Alexander Popov ... 46

CoO/Al2O3, CuO/Al2O3 AND NiO/Al2O3 CATALYSTS FOR PHOTODEGRADATION OF MALACHITE GREEN DYE UNDER UV-IRRADIATION
Chief. Assist. Prof. Milenova K. PhD., Chief. Assist. Prof. Zaharieva K. PhD., Assoc. Prof. Avramova I. PhD.,
Assoc. Prof. Stambolova I. PhD., Assoc. Prof. Blaskov V. PhD., Assoc. Prof. Dimitrov L. PhD., Assoc. Prof. Eliyas A. PhD. ... 49

POLYMER COMPOSITES WITH FIBER REINFORCEMENT
Ing. Lenka Markovičová, PhD., RNDr. Viera Zatkalíková, PhD., Eng. Aneta Tor – Świątek, Ph.D., Dr. Eng. Tomasz Garbacz ... 53

THE EFFECT OF FLUORIDE ON CORROSION BEHAVIOUR OF AUSTENITIC STAINLESS STEEL
RNDr. Viera Zatkalíková, PhD., Ing. Lenka Markovičová, PhD., Ing. Monika Oravcová ... 56

GRANULATED FOAM GLASS. PRODUCTION, PHYSICAL AND MECHANICAL PROPERTIES
Sen. Res. Eng. Marinov M., Assoc. Prof. Dr. Lakov L, Ph. D. Eng. Kr. Toncheva ... 59

ENVIRONMENTALLY FRIENDLY CONVERSION FILMS ON Zn AND TERNARY ZINC BASED ALLOYS – OBTAINING AND PROTECTIVE PROPERTIES
Assist. Peshova M. Tс., Assist. Bachvarov V. D., Assoc. Prof. Vitkova S. D., Assoc. Prof. Boshkov N. S. ... 62

STRUCTURE FORMATION AND CHARACTERISTICS OF COMPLEX BORIDE COATINGS ON STEEL, OBTAINED IN CONDITIONS OF ACTION MAGNETIC FIELD
Prof. Dr. Chernega S., Poliakov I., Krasovskiy M. ... 66

COMPARATIVE ANALYSIS OF STATIC AND DYNAMIC ELASTIC MODULUS OF POLYMER CONCRETE COMPOSITES
Assoc. Prof. Eng. Popov I. PhD., M.Sc. Sabev S. .... 71

NANOCRYSTALLINE POROUS VNX HYDROGEN STORAGE AS THE PROMISING MATERIAL FOR HYDROGEN ENERGY
Leading Res., Dr. Sci. Guglya A., Senior Res., PhD Kalchenko A., Prof, PhD Lyubchenko E., Junior Res. Solopihina E.,
Junior Res. Vlasov V. ... 75

EXPERIMENTAL DETERMINATION OF THE ELASTIC CONSTANTS OF POLYMER CONCRETE COMPOSITES
M.Sc. Sabev S. ... 78

FORMATION OF NEAR-NANO SIZE TiB2-TiN-Al2O3 POWDER BY SHS
H. Erdem Çamurlu, C. Bora Derin ... 82

A POSSIBILITY OF USING DUCTILE IRON IN THE RAILWAY INFRASTRUCTURE AND TRACK
Assoc.Prof.Dr.Georgi Evstatiev Rashev, Dipl. Eng Milen Sokolov Svilenov ... 85

EFFECT OF MINIATURIZATION FOR THE APPARENT DENSITY MEASUREMENTS OF IRON POWDERS
Assoc. Prof. Dr. Özkal B. ... 90

TRANSFORMATION OF EUTECTIC NON-METALLIC INCLUSIONS IN STEELS UNDER LASER ACTION
Prof.. Dr. Sci. Gubenko S. ... 91

EFFECT OF CRYSTALLINE FORM (γ) OF POLYAMIDE 6 / GRAPHENE NANOPLATELETS (PA6/GN) NANOCOMPOSITES ON ITS STRUCTURAL AND THERMAL PROPERTIES
Assist. Prof. Dr. F. Mindivan ... 94

COMPARATIVE STUDY OF TRIBOCORROSION PROPERTIES OF SOME BIOBASED MATERIALS IN SIMULATED ARTIFICIAL SALIVA
Assoc.Prof. Dr. H. Mindivan ... 98