An electrochemical synthesis of a rare-earth(La3+)-doped ZIF-8 hydroxyapatite composite coating for a Ti/TiO2 implant material

2021 ◽  
Author(s):  
Ziqi Zhang ◽  
Xiang Ni ◽  
Kaida Yao ◽  
Siqi Zhang ◽  
Yang Liu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Composite Coating ◽  
Electrochemical Synthesis ◽  
Corrosion Property ◽  
Titanium Implants ◽  
Implant Material ◽  
Hydroxyapatite Composite

Enhance the antibacterial and anti-corrosion property on the premise of minimizing the biocompatibility loss of titanium implants.

Effect of CO2 on Anti-Corrosion Property of a Polyurea Coating Modified with Organosilicone

2014 ◽  
Vol 789 ◽  
pp. 466-470
Author(s):  
Qing Hao Shi ◽  
Bing Ying Wang ◽  
Bin Zhao
Keyword(s):  
High Temperature ◽  
Partial Pressure ◽  
Composite Coating ◽  
Corrosion Test ◽  
Electrochemical Impedance ◽  
Failure Process ◽  
Corrosion Property ◽  
Corrosion Mechanism ◽  
Partial Pressures ◽  
High Temperature High Pressure

The corrosion mechanism of organic silicon modified polyurea composite coating under different CO2 partial pressures was studied using high-temperature autoclave, combined with scanning electron microscopy (SEM), adhesion tests and electrochemical impedance spectroscopy (EIS) technology. The experimental results showed that: there was no corrosion product formed on the surface of coating sample after high-temperature high-pressure corrosion test, and with the increasing of CO2 partial pressure, the coating adhesion and impedance values decline increases. Moreover CO2 partial pressure increases accelerated the failure process of polyurea composite coating system.

Effect of the Neodymium Content on Mechanical Properties of the Electro-Brush Plated Nano-Al2O3/Ni Composite Coating

2012 ◽  
Vol 525-526 ◽  
pp. 277-280
Author(s):  
Guo Jin ◽  
Xiu Fang Cui ◽  
Er Bao Liu ◽  
Qing Fen Li
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Composite Coating ◽  
Nanoindentation Test ◽  
X Ray Diffraction ◽  
X Ray ◽  
Small Cracks ◽  
Scanning Electron

The effect of the neodymium content on mechanical properties of the electro-brush plated nanoAl2O3/Ni composite coating was investigated in this paper. The microstructure and phase structure were studied with scanning electron microscope (SEM) and X-ray diffraction (XRD). The hardness and abrasion properties of several coatings with different neodymium content were studied by nanoindentation test and friction / wear experiment. Results show that the coatings are much finer and more compact when the neodymium was added, and the hardness and abrasion property of the coatings with neodymium were improved obviously. Besides, the small cracks conduced by the upgrowth stress in the coatings were ameliorated when the rare earth neodymium was added. The improvement mechanism was further discussed.

Resorbable Metallic Implant: Findings from an Animal Model

2008 ◽  
Vol 47-50 ◽  
pp. 604-607
Author(s):  
C.K. Yuen ◽  
W.Y. Ip
Keyword(s):  
Rare Earth ◽  
Magnesium Alloys ◽  
Health Effect ◽  
Earth Metal ◽  
Corrosion Property ◽  
Gas Production ◽  
Exposure Level ◽  
Potential Health ◽  
Metallic Implant

Resorbable metallic implant of magnesium and its alloys had been studied since the 1900s. However, the excessive gas production resulted in its unpopularity after CoCr alloys and stainless steel were developed. With the advancement of alloying technologies, its use as a resorbable implant has re-emerged recently. Foreign researchers focused on the use of AZ-series and magnesium-rare earth metal alloys. However, the corrosion property of AZ-series alloys is unsatisfactory, and the effect of rare-earth metals on human is poorly studied. Therefore, we have investigated on the feasibility of using commercially available AM-series magnesium alloys. Previous researchers avoided this alloy series presumably because of the potential health effect of manganese, however our toxicological risk assessment revealed that the exposure level would be lower than the NOAEL (No Observable Adverse Effect Level), thus it is unlikely to cause any observable health effect on healthy individuals. Subcutaneous implantation of AM-series magnesium alloys into a mouse model for six months confirmed that, while all alloys tested showed slow corrosion and no observable in vivo toxicity, pitting corrosion did not occur for AM-series alloys but was frequent for AZ91D. This suggests that AM-series magnesium alloys are good candidates of resorbable metallic implants.

Zirconia-Hydroxyapatite Composite Coating on Cp-Ti Implants by Biomimetic Method

2012 ◽  
Vol 445 ◽  
pp. 685-690
Author(s):  
A. Binnaz Hazar Yoruc ◽  
Aysu Karakas ◽  
Oktay Elkoca ◽  
Yeliz Koca Ipek
Keyword(s):  
Composite Coating ◽  
Hydroxyapatite Composite ◽  
Biomimetic Method ◽  
Cp Ti

A novel bioactive Ta/hydroxyapatite composite coating fabricated by cold spraying

2019 ◽  
Vol 250 ◽  
pp. 197-201 ◽  
Author(s):  
Junrong Tang ◽  
Zhipo Zhao ◽  
Housheng Liu ◽  
Xinyu Cui ◽  
Jiqiang Wang ◽  
...  
Keyword(s):  
Composite Coating ◽  
Cold Spraying ◽  
Hydroxyapatite Composite

Bioactive Composite Coating on Titanium Implants for Hard Tissue Repair

2007 ◽  
Vol 334-335 ◽  
pp. 1249-1252 ◽  
Author(s):  
Jin Ming Wu ◽  
Min Wang ◽  
Akiyoshi Osaka
Keyword(s):  
Composite Coating ◽  
Low Temperatures ◽  
Tissue Repair ◽  
Body Fluid ◽  
Titanium Implants ◽  
Apatite Formation ◽  
Hard Tissue ◽  
Layer Composite ◽  
Titania Layer ◽  
Hydrolysis Of

A bioactive composite coating consisting of one layer of titania and one layer of apatite was formed on Ti substrate. The first layer of crystalline titania was deposited on Ti at low temperatures either through oxidation of Ti by hydrogen peroxide solution or through hydrolysis of TiF4 or TiCl4 solution. It was shown that the crystalline titania, either in the form of anatase or rutile, induced formation of the second layer of apatite in a simulated body fluid. However, the trace elements in the titania layer affected greatly apatite formation. The Cl incorporated in the titania layer did not hinder apatite formation while F did. The two-layer composite coating should enhance bonding of Ti implants to bone tissue.

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