- citations in SCIndeks: [3]
- citations in CrossRef:0
- citations in Google Scholar:[
 ]
- visits in previous 30 days:9
- full-text downloads in 30 days:0
|
|
|
2019, vol. 60, iss. 1, pp. 44-49
|
|
Characterization of plasma spray bioinert coating Al2O328wt.%MgO
Karakterizacija plazma sprej bioinertne prevlake Al2O328tež.%MgO
aIMTEL Institute, Belgrade, Serbia bUniversity of Belgrade, Faculty of Agriculture, Serbia cUniversity of Belgrade, Faculty of Technology and Metallurgy, Serbia dChemical Power Sources Institute - IHIS, Belgrade, Serbia
email: drmrdakmihailo@gmail.com
Project: Micromechanical criteria of damage and fracture (MESTD - 174004)
Development of covering and core production technology based on local raw materials for manufacturing of special coated electrodes designed for steel arc welding (MESTD - 34016)
Abstract
This paper presents the results of testing mechanical and structural characteristics of plasma spray coating Al2O328wt.%MgO. Metal oxide MgO in a complex oxide Al2O328wt.%MgO modifies the properties of Al2O3 ceramics by forming spinel MgAl2O4 with excellent biomedical characteristics. The coating layers were deposited by atmospheric plasma spraying process (APS) on steel substrates of stainless steel X15Cr13 (EN 1.4024). The aim of this study was to examine the effect of the strength of the plasma current (700A, 800A and 900A) on the mechanical properties of the Al2O3MgO coating, pore content and microstructure of the layers. Testing microhardness of the layers using the HV0.3 method, the bond strength using the tensile method and microstructure using optical microscopy (OM) and scanning electron microscopy (SEM) have confirmed that, by controlling the plasma current, layers of the coating system Al2O328wt.%MgO can be deposited with good mechanical and microstructural characteristics suitable for use in manufacture of implants.
Sažetak
U ovom radu su prikazani rezultati ispitivanja mehaničkih i strukturnih karakteristika plazma sprej prevlake Al2O328tež.%MgO. Metalni oksid MgO u kompleksnom oksidu Al2O328tež.%MgO modifikuje osobine Al2O3 keramike formiranjem spinela MgAl2O4 odličnih biomedicinskih karakteristika. Slojevi prevlake su deponovani atmosferski plazma sprej procesom (APS) na čeličnim podlogama od nerđajućeg čelika X15Cr13 (EN 1.4024). Cilj ovog rada je bio da se ispita efekat jačine plazma struje (700A, 800A i 900A) na mehaničke osobine prevlake Al2O3MgO, sadržaj pora i mikrostrukturu slojeva. Ispitivanja mikrotvrdoće slojeva metodama HV0.3, čvrstoće spoja zatezanjem i mikrostrukture optičkom mikroskopijom (OM) i skening elektronskom mikroskopijom (SEM) su potvrdila da se sa kontrolom plazma struje mogu deponovati slojevi sistema prevlake Al2O328tež.%MgO dobrih mehaničkih i mikrostrukturih karakteristika pogodnih za primenu u eksploataciji za proizvodnju implanata.
|
|
|
|
References
|
|
|
*** GTV Spray powder catalogue: GTV Spray powders comply with DIN EN 1274. Materials number 40.29.1 based on alumina III
|
|
|
*** (2008) ASTM C633-1(2008) standard test method for adhesion or cohesion strength of thermal spray coatings. Reapproved
|
|
  
|
Borges, G.A., Caldas, D., Taskonak, B., Yan, J., Sobrinho, L.C., de Oliveira, W.J. (2009) Fracture Loads of All-Ceramic Crowns under Wet and Dry Fatigue Conditions. Journal of Prosthodontics, 18(8): 649-655
|
|
|
Hallstedt, B. (1992) Thermodynamic Assessment of the System MgO-Al2O3. Journal of the American Ceramic Society, 75(6): 1497-1507
|
|
|
Kokubo, T. (2008) Bioceramics and their clinical applications. Woodhead publishing limited, ISBN: 9781845694227
|
|
1
|
Manicone, P.F., Rossi, I.P., Raffaelli, L. (2007) An overview of zirconia ceramics: Basic properties and clinical applications. Journal of Dentistry, 35(11): 819-826
|
|
1 
|
Mrdak, M., Lačnjevac, Č., Rakin, M. (2018) Mehaničke i strukturne karakteristike slojeva prevlake Nb deponovane u vakuumu. Zaštita materijala, vol. 59, br. 2, str. 167-172
|
|
5
|
Mrdak, M., Rakin, M., Medjo, B., Bajić, N. (2015) Experimental study of insulating properties and behaviour of thermal barrier coating systems in thermo cyclic conditions. Materials & Design, 67: 337-343
|
|
3
|
Mrdak, M. (2017) Karakterizacija plazma sprej bioinertne kompozitne prevlake Al2O325tež.%(ZrO28%Y2O3). Zaštita materijala, vol. 58, br. 4, str. 509-514
|
|
1
|
Mrdak, M.R. (2017) Testing mechanical structural characteristics of Al2O3 oxide ceramics resistant to sliding friction. Vojnotehnički glasnik, vol. 65, br. 4, str. 924-936
|
|
|
Rooi, P.L., Azad, A., Wan, D.T. (2001) Magnesium aluminate (MgAl2O4) spinel produced via self-heat-sustained (SHS) technique. Materials Research Bulletin, 36(7-8): 1417-1430
|
|
|
Sorrentino, R., Aversa, R., Ferro, V., Auriemma, T., Zarone, F., Ferrari, M., Apicella, A. (2007) Three-dimensional finite element analysis of strain and stress distributions in endodontically treated maxillary central incisors restored with diferent post, core and crown materials. Dental Materials, 23(8): 983-993
|
|
|
Wefers, K., Misra, C. (1987) Oxides and hydroxides of Aluminum. Alcoa Technical Paper, 19, Revised, Aleo Laboratories
|
|
|
Yang, H., Luan, W., Tu, S. (2006) Corrosion Behavior and Thermal Conductivity of Plasma Sprayed. Materials Transactions, 47(7): 1649-1653
|
|
|
Zhihui, Z., Nan, L., Guozhi, R. (2007) Effect of polymorphism of Al2O3 on sintering and grain growth of magnesia aluminate spinel. Science of Sintering, vol. 39, br. 1, str. 9-15
|
|
|
Zhihui, Z., Nan, L.I. (2004) Influence of mechanical activation of AL2O3 on synthesis of magnesium aluminate spinel. Science of Sintering, vol. 36, br. 2, str. 73-79
|
|
|
|
|