Adhesion properties of a silicon-containing calcium phosphate coating deposited by RF magnetron sputtering on a heated substrate

2013 ◽  
Vol 7 (5) ◽  
pp. 944-951 ◽  
Author(s):  
M. A. Surmeneva ◽  
R. A. Surmenev ◽  
V. F. Pichugin ◽  
N. N. Koval’ ◽  
A. D. Teresov ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Rf Magnetron Sputtering ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Adhesion Properties ◽  
Heated Substrate

Calcium Phosphate Coating on Blast-Treated Titanium Implants by RF Magnetron Sputtering

2009 ◽  
Vol 631-632 ◽  
pp. 211-216 ◽  
Author(s):  
Kyosuke Ueda ◽  
Takayuki Narushima ◽  
Takashi Goto ◽  
T. Katsube ◽  
Hironobu Nakagawa ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Bonding Strength ◽  
Rf Magnetron Sputtering ◽  
Titanium Implants ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Coating Films

Calcium phosphate coating films were fabricated on Ti-6Al-4V plates and screw-type implants with a blast-treated surface using radiofrequency (RF) magnetron sputtering and were evaluated in vitro and in vivo. Amorphous calcium phosphate (ACP) and oxyapatite (OAp) films obtained in this study could cover the blast-treated substrate very efficiently, maintaining the surface roughness. For the in vitro evaluations of the calcium phosphate coating films, bonding strength and alkaline phosphatase (ALP) activity were examined. The bonding strength of the coating films to a blast-treated substrate exceeded 60 MPa, independent of film phases except for the film after post-heat-treatment in silica ampoule. When compared with an uncoated substrate, the increase in the ALP activity of osteoblastic SaOS-2 cells on a calcium phosphate coated substrate was confirmed by a cell culture test. The removal torque of screw-type Ti-6Al-4V implants with a blast-treated surface from the femur of Japanese white rabbit increased with the duration of implantation and it was statistically improved by coating an ACP film 2 weeks after implantation. The in vitro and in vivo studies suggested that the application of the sputtered ACP film as a coating on titanium implants was effective in improving their biocompatibility with bones.

Calcium Phosphate Coating on Titanium Using Dry Process

2010 ◽  
Vol 654-656 ◽  
pp. 2162-2167
Author(s):  
Takayuki Narushima ◽  
Kyosuke Ueda ◽  
Takashi Goto ◽  
Jun Kurihara ◽  
Hiroshi Kawamura
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Bonding Strength ◽  
Rf Magnetron Sputtering ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Coating Films ◽  
Removal Torque

Oxyapatite, amorphous calcium phosphate, and double-layered calcium phosphate coating films were fabricated on mirror-polished commercially pure titanium (CP Ti) and blasted Ti-6Al-4V alloy substrates by radiofrequency (RF) magnetron sputtering; the properties of these films were evaluated in vivo and in vitro. The bonding strength between the calcium phosphate films and the Ti substrates was higher than 50 MPa. This value is higher than the bonding strength reported in the case of plasma-sprayed calcium phosphate coating films fabricated on Ti substrates. The removal torque of screw-type blasted Ti-6Al-4V alloy implants in the femurs of Japanese white rabbits increased with the duration of implantation, and the removal torque values of the coated implants was observed to be higher than those of the non-coated implants. In vitro and in vivo studies indicate that coating Ti implants with calcium phosphate films using RF magnetron sputtering is effective in improving the bone compatibility of Ti implants. Finally, the factors that should be considered in fabricating biomedical coating films were discussed.

scholarly journals Evaluation of Calcium Phosphate Coating Films on Titanium Fabricated Using RF Magnetron Sputtering

2007 ◽  
Vol 48 (3) ◽  
pp. 307-312 ◽  
Author(s):  
Kyosuke Ueda ◽  
Takayuki Narushima ◽  
Takashi Goto ◽  
Tomoyuki Katsube ◽  
Hironobu Nakagawa ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Rf Magnetron Sputtering ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Coating Films

Calcium Phosphate Coating on Titanium by RF Magnetron Sputtering

2012 ◽  
pp. 223-233
Author(s):  
Takayuki Narushima ◽  
Kyosuke Ueda
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Rf Magnetron Sputtering ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Metallic Biomaterials ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

In this chapter, the authors discuss the fabrication and properties of calcium phosphate coatings on titanium (Ti) by radio-frequency (RF) magnetron sputtering. First, they address the necessity of surface modification of metallic biomaterials and the effectiveness of calcium phosphate coating. Next, they briefly review the processes used in the application of calcium phosphate coatings and present the effect of sputtering parameters on the phase and deposition rates of these coatings. Finally, the chapter discusses the performance of amorphous and crystalline (oxyapatite) calcium phosphate coatings on Ti based on in vitro and in vivo evaluations.

Mechanical Properties of Calcium Phosphate Coatings Produced by Method of RF-Magnetron Sputtering on Bioinert Alloys

2014 ◽  
Vol 1013 ◽  
pp. 188-193 ◽  
Author(s):  
Kseniya Kulyashova ◽  
Yuri P. Sharkeev ◽  
Aizhan Sainova
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Adhesion Strength ◽  
Rf Magnetron Sputtering ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

Results of research of mechanical properties of calciumphosphate coatings produced by the method radio frequency magnetron sputtering on bioinert alloys of titanium, zirconium and were presented. Calcium phosphate coatings show high value of adhesion strength to bioinert metal surface. Calcium phosphate coating on titanium-niobium alloy surface shows the highest value of adhesion strength. Mechanical properties of a composite material based on bioinert alloy and calcium phosphate coating are higher than properties of the components of composite material separately.

scholarly journals Investigation of the adhesion properties of calcium-phosphate coating to titanium substrate with regards to the parameters of high-frequency magnetron sputtering

2020 ◽  
Vol 22 (2) ◽  
Author(s):  
Aidar K. Kenzhegulov ◽  
Axaule A. Mamaeva ◽  
Alexander V. Panichkin ◽  
Konstantin A. Prosolov ◽  
Anna Brończyk ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
High Frequency ◽  
Titanium Substrate ◽  
Specific Power ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Adhesion Properties ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

Purpose: The main goal of the work was to find the interconnection between the high-frequency magnetron sputtering parameters and the adhesion properties of CaP coatings formed on the surface of titanium substrate. Methods: Calcium-phosphate coatings, similar in composition to hydroxyapatite, were generated by high-frequency magnetron sputtering on titanium substrate at different values of high-frequency specific power over times of one and two hours. Afterwards, the generated coatings were studied using the method of X-ray phase analysis, and sclerometric tests (scratch test) were carried out. The adhesion strength of the deposited coatings was tested for different coating thicknesses from 0.45 to 1.1 × 10–3 mm. Results: According to the results of sclerometry, it was found that with an increase in the high-frequency specific power of plasma to 3.15 W/cm2, the adhesion strength of the calcium-phosphate coating also increases. For all the coatings, the critical loads at which the coating completely exfoliated from the substrate were determined. Conclusions: According to the research results, the most optimal conditions for obtaining high-adhesive calcium-phosphate coatings were determined.

Characterization of Calcium Phosphate Films Prepared by RF Magnetron Sputtering

2005 ◽  
Vol 888 ◽  
Author(s):  
Takayuki Narushima ◽  
Kyosuke Ueda ◽  
Takashi Goto ◽  
Tomoyuki Katsube ◽  
Hiroshi Kawamura ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnetron Sputtering ◽  
Amorphous Calcium Phosphate ◽  
Pure Titanium ◽  
Active Surface ◽  
Rf Magnetron Sputtering ◽  
Titanium Implants ◽  
Calcium Phosphate Coating ◽  
Commercially Pure Titanium ◽  
Cp Ti

ABSTRACTCalcium phosphate films were prepared on commercially pure titanium (CP-Ti) substrates by RF magnetron sputtering using β-tricalcium phosphate targets. XRD and FTIR analyses showed that the films consisted of amorphous calcium phosphate and oxyapatite phases. The (002) preferred orientation of the oxyapatite phase was observed depending on the oxygen gas concentration in the sputtering gas. The surface reactions of the calcium phosphate films were investigated in Hanks' solution and PBS(-). Apatite crystallites were detected on the films after immersion for 7 days. An active surface reaction was observed on the amorphous calcium phosphate films during immersion in PBS(-). The CP-Ti plates coated with the calcium phosphate films were placed on the mandible of male Japanese white rabbits. These results suggest that the calcium phosphate coating improves the biocompatibility of titanium implants with bone.

Nanostructured Calcium Phosphate Coating for Stents

2007 ◽  
Vol 361-363 ◽  
pp. 721-724
Author(s):  
U. Lembke ◽  
Regina Lange ◽  
Ulrich Beck ◽  
Hans Georg Neumann
Keyword(s):  
Calcium Phosphate ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Calcium Phosphate Coating ◽  
Phosphate Coating ◽  
Metallic Surfaces ◽  
Good Adhesion ◽  
Adhesion Properties ◽  
High Adhesion ◽  
Reduced Risk

A nanoporous calcium phosphate (CaP) coating on metallic surfaces is presented. The coating consists of a stack of (a) a TiNbN layer deposited by physical vapor deposition and acting as diffusion barrier against allergenic ions, (b) a SiO2 xerogel layer providing good adhesion properties and designing the nanoporosity of the outer CaP layer (c) precipitated electrochemically. SEM results verified a homogeneous nanoscale porous structure of the CaP coating. It is characterized by a high adhesion strength. If applied to stent covering the nanoporous CaP coating has promising properties to initiate rapid endothelium formation and reduced risk of restenosis.

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