Microstructural study of plasma sprayed hydroxyapatite coatings
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2017, Vol 2, Issue 83
Abstract
Purpose: The aim of this study is to present microstructure and mechanical properties of hydroxyapatite coatings sprayed by means novel plasma system with axially injection of powder. Design/methodology/approach: Coatings were deposited with Axial III plasma spraying system and examined by SEM, XRD and by a nanoindentation technique (Nanovea) with a Berkovitz indenter. Surface of coatings was analysed by means of a Talysurf CCI-Lite non-contact 3D profiler. Findings: This study shows the microstructure and mechanical properties of hydroxyapatite coatings (HA) obtained by plasma spraying from the powder with a cauliflower-like high porous structure consisting of nanograins with dimension below 100 nm. The cross-section of plasma sprayed HA coating reveals lamellar structure containing pores in the interior of the lamellae. Moreover, between lamellae, some microcracks were detected. Hardness and elastic modulus measured by nanoindentation were found to be around 0.085 and 6.82 GPa respectively, what was comparable with HA coatings sprayed by a modified cold spray system. Both XRD patterns are practically identical, so no new phases were created in hydroxyapatite coating in comparison with feedstock powder during the spray process. High values of a geometry of HA coating; maximum peak height, maximum pit height and maximum height confirmed significant roughening of a surface, which is a result of the interaction of melted powder grains with the surfaces during the plasma spraying. Research limitations/implications: Obtained properties of coatings will be the base for comparison with suspension plasma sprayed coatings. Practical implications: Hydroxyapatite coatings deposited by means novel plasma system are designated for spraying implants. Originality/value: Properties of hydroxyapatite coatings plasma sprayed with novel axially injection of powder.
Authors and Affiliations
S. Kowalski, R. Belka, W. Żórawski, M. Sztorc, A. Góral
Keywords
Related Articles
- EP ID EP244727
- DOI 10.5604/01.3001.0010.7035
- Views 98
- Downloads 0
Tribological study of low friction DLC:Ti and MoS2 thin films
Purpose: The purpose of this article is to characterize and compare the microstructure and tribological properties of low friction DLC:Ti and MoS2 thin films deposited on the austenitic steel X6CrNiMoTi17-12-2 substrate....
Advances in winch system for defence applications
Purpose: Winch systems are commonly used in many applications starting from fishingindustries to highly advanced defence, space and nuclear sectors. This paper discussesadvances in development of winch system for defence...
Analysis of weld bead characteristics on GMAW by changing wire electrode geometry
Purpose: Welding is one of the important processes for the manufacture of a wide varietyof products. Most of the manufactured products have to be produced by welding due to itsgreater productivity and economical viabilit...
Virtual laboratory methodology in scientific researches and education
Purpose: This article is presenting the Material Science Virtual Laboratory. Developed laboratory is an open scientific, investigative, simulating and didactic medium helpful in the realisation of the scientific and dida...
Effect of vanadium microaddition on the microstructure and mechanical properties of casing pipes after normalizing process
Purpose: The aim of the paper is to determine the impact of vanadium microaddition onmechanical properties and microstructure of two steel grades with a different content of V,applied for production of casing pipes used...