Plasma coating of hydroxyapatite
Apstrakt
Characteristics of the hydroxyapatite (HA) plasma coatings are directly related to the performances of the plasma jet used in the deposition process. Previous research within a plasma spray technique, based on the application of the conventional plasma gun (PG), suggested the use of lower power level of the PG, about 25kW, in order to avoid significant chemical decomposition of HA occurring at higher powers. However, coatings obtained at this power level have a poor microstructure, resulting in their unsatisfactory cohesion/adhesion properties. In contrast to that, this study shows that good quality HA coatings can be produced in plasma obtained by plasma jet operated at high power level (52 kW) and in laminar flow mode. For two HA powders types, containing particles differing in mass by a factor of 20, a set of optimum deposition parameters has been defined leading to the coatings with high crystallinity (80-90%), excellent microstructure (porosity 1-2%) and high adhesion strength (60... and 40 MPa for the coating thicknesses of 120 and 350 mu m, respectively). It has been shown that higher plasma power does not necessarily lead to a higher HA decomposition.
Ključne reči:
hydroxyapatite coating / plasma spraying / bonding strength / phase compositionIzvor:
Composite Interfaces, 2012, 19, 3-4, 279-284Napomena:
- 1st International Conference on Plasma Processing of Organic Materials and Polymers (PPOMP), Nov 25-26, 2011, Mahatma Gandhi Univ, Kottayam, India
DOI: 10.1080/15685543.2012.701155
ISSN: 0927-6440
WoS: 000308108200014
Scopus: 2-s2.0-84871229852
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Vilotijević, Miroljub N. PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6972 AB - Characteristics of the hydroxyapatite (HA) plasma coatings are directly related to the performances of the plasma jet used in the deposition process. Previous research within a plasma spray technique, based on the application of the conventional plasma gun (PG), suggested the use of lower power level of the PG, about 25kW, in order to avoid significant chemical decomposition of HA occurring at higher powers. However, coatings obtained at this power level have a poor microstructure, resulting in their unsatisfactory cohesion/adhesion properties. In contrast to that, this study shows that good quality HA coatings can be produced in plasma obtained by plasma jet operated at high power level (52 kW) and in laminar flow mode. For two HA powders types, containing particles differing in mass by a factor of 20, a set of optimum deposition parameters has been defined leading to the coatings with high crystallinity (80-90%), excellent microstructure (porosity 1-2%) and high adhesion strength (60 and 40 MPa for the coating thicknesses of 120 and 350 mu m, respectively). It has been shown that higher plasma power does not necessarily lead to a higher HA decomposition. T2 - Composite Interfaces T1 - Plasma coating of hydroxyapatite VL - 19 IS - 3-4 SP - 279 EP - 284 DO - 10.1080/15685543.2012.701155 ER -
@article{ author = "Vilotijević, Miroljub N.", year = "2012", abstract = "Characteristics of the hydroxyapatite (HA) plasma coatings are directly related to the performances of the plasma jet used in the deposition process. Previous research within a plasma spray technique, based on the application of the conventional plasma gun (PG), suggested the use of lower power level of the PG, about 25kW, in order to avoid significant chemical decomposition of HA occurring at higher powers. However, coatings obtained at this power level have a poor microstructure, resulting in their unsatisfactory cohesion/adhesion properties. In contrast to that, this study shows that good quality HA coatings can be produced in plasma obtained by plasma jet operated at high power level (52 kW) and in laminar flow mode. For two HA powders types, containing particles differing in mass by a factor of 20, a set of optimum deposition parameters has been defined leading to the coatings with high crystallinity (80-90%), excellent microstructure (porosity 1-2%) and high adhesion strength (60 and 40 MPa for the coating thicknesses of 120 and 350 mu m, respectively). It has been shown that higher plasma power does not necessarily lead to a higher HA decomposition.", journal = "Composite Interfaces", title = "Plasma coating of hydroxyapatite", volume = "19", number = "3-4", pages = "279-284", doi = "10.1080/15685543.2012.701155" }
Vilotijević, M. N.. (2012). Plasma coating of hydroxyapatite. in Composite Interfaces, 19(3-4), 279-284. https://doi.org/10.1080/15685543.2012.701155
Vilotijević MN. Plasma coating of hydroxyapatite. in Composite Interfaces. 2012;19(3-4):279-284. doi:10.1080/15685543.2012.701155 .
Vilotijević, Miroljub N., "Plasma coating of hydroxyapatite" in Composite Interfaces, 19, no. 3-4 (2012):279-284, https://doi.org/10.1080/15685543.2012.701155 . .