TY - JOUR
T1 - Improvement of adhesion and barrier properties of biomedical stainless steel by deposition of YSZ coatings using RF magnetron sputtering
AU - Sánchez-Hernández, Z. E.
AU - Domínguez-Crespo, M. A.
AU - Torres-Huerta, A. M.
AU - Onofre-Bustamante, E.
AU - Andraca Adame, J.
AU - Dorantes-Rosales, H.
N1 - Funding Information:
The authors acknowledge the financial support provided by CONACYT ( 132660 , 133618 ), COFAA-IPN , SIP-IPN 2014-0992 , 2014-0164 and SNI-CONACYT . The authors thank Q. A. C. Espíndola-Flores, M. E. Adela. E. Rodríguez-Salazar and Dr. Paul E. Riley (Peace Corps) for their technical support.
PY - 2014/5
Y1 - 2014/5
N2 - The AISI 316L stainless steel (SS) has been widely used in both artificial knee and hip joints in biomedical applications. In the present study, yttria stabilized zirconia (YSZ, ZrO2 + 8% Y2O3) films were deposited on AISI 316L SS by radio-frequency magnetron sputtering using different power densities (50-250 W) and deposition times (30-120 min) from a YSZ target. The crystallographic orientation and surface morphology were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effects of the surface modification on the corrosion performance of AISI 316L SS were evaluated in phosphate buffered saline (PBS) solution using an electrochemical test on both the virgin and coated samples. The YSZ coatings have a (111) preferred orientation during crystal growth along the c-axis for short deposition times (30-60 min), whereas a polycrystalline structure forms during deposition times from 90 to 120 min. The corrosion protective character of the YSZ coatings depends on the crystal size and film thickness. A significant increase in adhesion and corrosion resistance by at least a factor of 46 and a higher breakdown potential were obtained for the deposited coatings at 200 W (120 min).
AB - The AISI 316L stainless steel (SS) has been widely used in both artificial knee and hip joints in biomedical applications. In the present study, yttria stabilized zirconia (YSZ, ZrO2 + 8% Y2O3) films were deposited on AISI 316L SS by radio-frequency magnetron sputtering using different power densities (50-250 W) and deposition times (30-120 min) from a YSZ target. The crystallographic orientation and surface morphology were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effects of the surface modification on the corrosion performance of AISI 316L SS were evaluated in phosphate buffered saline (PBS) solution using an electrochemical test on both the virgin and coated samples. The YSZ coatings have a (111) preferred orientation during crystal growth along the c-axis for short deposition times (30-60 min), whereas a polycrystalline structure forms during deposition times from 90 to 120 min. The corrosion protective character of the YSZ coatings depends on the crystal size and film thickness. A significant increase in adhesion and corrosion resistance by at least a factor of 46 and a higher breakdown potential were obtained for the deposited coatings at 200 W (120 min).
KW - 316L stainless steel
KW - Adhesion
KW - Ceramic coatings
KW - Corrosion
KW - Magnetron sputtering
UR - http://www.scopus.com/inward/record.url?scp=84897729342&partnerID=8YFLogxK
U2 - 10.1016/j.matchar.2014.02.007
DO - 10.1016/j.matchar.2014.02.007
M3 - Artículo
SN - 1044-5803
VL - 91
SP - 50
EP - 57
JO - Materials Characterization
JF - Materials Characterization
ER -