Abstracts Book - IMRC 2018

• SB5-O014
EFFECT OF BOTH YSZ CONTENT OF AN HA PLASMA SPRAY BIO-
COATING
Victor Orozco 1 , Roberto Gómez Batres 2 , Irene Leal Solís 3 , Hugo Estupiñan 4
1 Centro de Investigación en Materiales Avanzados, S.C., MIE, Mexico. 2 Centro de Investigación
en Materiales Avanzados, S.C., MEI, Mexico. 3 Universidad Autónoma de Chihuahua, Facultad de
Medicina, Mexico. 4 Universidad Nacional de Colombia, Sede Medellin, Facultad de MInas,
Colombia.
The purpose of this study was characterizing the influence of two powder mixing
methods and the effect of YSZ amount in HA bio-coating. The powder coatingprecursor
were based by hydroxyapatite (HA), yttrium-stabilized zirconia
nanoparticles (YSZ 8% mol) and silver nanoparticles bio-synthesized by a
green method of Opuntia Ficus aqueous extract reduction (nAg-EN). The
coatings were developed with a two weight percent ratio (W/W%), HA0.891-
YSZ0.099-nAg0.01 and HA0.693-YSZ0.297-nAg0.01. The powders were mixed by two
methods; the first method was performed by mechanical stirring; the second
was homogenized by a high energy ball milling (SPEX 8000M). The coatings were
deposited by thermal plasma spray gun (PRAXAIR SURFACE THECHNOLOGIES
SG100). The powders and coatings were characterized by X-ray diffraction;
morphology and phase distribution was observed by a scanning electron
microscopy (SEM); bond strength was measured using a tensile test (ASTM C633-
01). According to the results, XRD phase identification shows the thermal impact
of plasma spray deposition; the coatings shows the presence of HA degradation
to tetracalcium phosphate (TTCP) and tricalcium phosphate (TCP). The coating
obtained by a high energy ball milling homogenization has better phase
distribution than the stirring method; phase distribution shows a high impact in
bond strength properties of the coatings obtained by both methods; the
coatings developed by a high energy ball milling shows better bond strength
than stirring method. For another part, increasing amount of YSZ 9.9% to 29.7%
the coatings generate a better bond strength, perhaps, coatings with YSZ shown
higher bond strength than a commercial HA coatings.
Keywords: Hydroxyapatite, Plasma Spray, yttrium-stabilized zirconia nanoparticles
Presenting authors email: roberto.gomez@cimav.edu.mx