Preparation and characterization of a calcium–phosphate–silicon coating on a Mg–Zn–Ca alloy via two-step micro-arc oxidation

2017 ◽  
Vol 19 (23) ◽  
pp. 15110-15119 ◽  
Author(s):  
Jinhe Dou ◽  
Yang Chen ◽  
Yiming Chi ◽  
Huancai Li ◽  
Guochao Gu ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Magnesium Alloys ◽  
Implant Materials ◽  
Micro Arc Oxidation ◽  
Silicon Coating

Magnesium alloys are the most promising implant materials due to their excellent biodegradability.

Electrocrystallization, growth and characterization of calcium phosphate ceramics on magnesium alloys

2013 ◽  
Vol 109 ◽  
pp. 694-700 ◽  
Author(s):  
Z. Grubač ◽  
M. Metikoš-Huković ◽  
R. Babić
Keyword(s):  
Calcium Phosphate ◽  
Magnesium Alloys ◽  
Calcium Phosphate Ceramics

scholarly journals Preparation and characterization of the micro-arc oxidation composite coatings on magnesium alloys

2014 ◽  
Vol 2 (4) ◽  
pp. 309-316 ◽  
Author(s):  
Yanfeng Ge ◽  
Bailing Jiang ◽  
Ming Liu ◽  
Congjie Wang ◽  
Wenning Shen
Keyword(s):  
Magnesium Alloys ◽  
Composite Coatings ◽  
Micro Arc Oxidation

Formation of silicon-calcium-phosphate-containing coating on Mg-Zn-Ca alloy by a two-step micro-arc oxidation technique

2018 ◽  
Vol 212 ◽  
pp. 37-40 ◽  
Author(s):  
Jinhe Dou ◽  
Chunyan Wang ◽  
Guochao Gu ◽  
Chuanzhong Chen
Keyword(s):  
Calcium Phosphate ◽  
Micro Arc Oxidation

scholarly journals Characterization of the adsorption of conjugated and unconjugated bile acids to insoluble, amorphous calcium phosphate.

1994 ◽  
Vol 35 (5) ◽  
pp. 741-748
Author(s):  
M J Govers ◽  
D S Termont ◽  
G A Van Aken ◽  
R Van der Meer
Keyword(s):  
Calcium Phosphate ◽  
Bile Acids ◽  
Amorphous Calcium Phosphate

Preparation and characterization of porous HA/β-TCP biphasic calcium phosphate derived from butterfish bone

2021 ◽  
pp. 1-8
Author(s):  
Kehan Deng ◽  
Haiwen Chen ◽  
Wenxue Dou ◽  
Qi Cai ◽  
Xingang Wang ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Biphasic Calcium Phosphate

scholarly journals Amorphous–Crystalline Calcium Phosphate Coating Promotes In Vitro Growth of Tumor-Derived Jurkat T Cells Activated by Anti-CD2/CD3/CD28 Antibodies

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3693
Author(s):  
Yurii P. Sharkeev ◽  
Ekaterina G. Komarova ◽  
Valentina V. Chebodaeva ◽  
Mariya B. Sedelnikova ◽  
Aleksandr M. Zakharenko ◽  
...  
Keyword(s):  
T Cells ◽  
Calcium Phosphate ◽  
Biological Effects ◽  
Electrical Potential ◽  
Biological Properties ◽  
Modern Trend ◽  
Calcium Phosphate Coating ◽  
Jurkat T Cells ◽  
Micro Arc Oxidation

A modern trend in traumatology, orthopedics, and implantology is the development of materials and coatings with an amorphous–crystalline structure that exhibits excellent biocopatibility. The structure and physico–chemical and biological properties of calcium phosphate (CaP) coatings deposited on Ti plates using the micro-arc oxidation (MAO) method under different voltages (200, 250, and 300 V) were studied. Amorphous, nanocrystalline, and microcrystalline statesof CaHPO4 and β-Ca2P2O7were observed in the coatings using TEM and XRD. The increase in MAO voltage resulted in augmentation of the surface roughness Ra from 2.5 to 6.5 µm, mass from 10 to 25 mg, thickness from 50 to 105 µm, and Ca/P ratio from 0.3 to 0.6. The electrical potential (EP) of the CaP coatings changed from −456 to −535 mV, while the zeta potential (ZP) decreased from −53 to −40 mV following an increase in the values of the MAO voltage. Numerous correlations of physical and chemical indices of CaP coatings were estimated. A decrease in the ZP magnitudes of CaP coatings deposited at 200–250 V was strongly associated with elevated hTERT expression in tumor-derived Jurkat T cells preliminarily activated with anti-CD2/CD3/CD28 antibodies and then contacted in vitro with CaP-coated samples for 14 days. In turn, in vitro survival of CD4+ subsets was enhanced, with proinflammatory cytokine secretion of activated Jurkat T cells. Thus, the applied MAO voltage allowed the regulation of the physicochemical properties of amorphous–crystalline CaP-coatings on Ti substrates to a certain extent. This method may be used as a technological mechanism to trigger the behavior of cells through contact with micro-arc CaP coatings. The possible role of negative ZP and Ca2+ as effectors of the biological effects of amorphous–crystalline CaP coatings is discussed. Micro-arc CaP coatings should be carefully tested to determine their suitability for use in patients with chronic lymphoid malignancies.

Preparation and Characterization of Zn-Containing Hydroxyapatite/TiO2 Composite Coatings on Ti Alloys

2011 ◽  
Vol 685 ◽  
pp. 367-370 ◽  
Author(s):  
Min Qi ◽  
Da Yi Yang ◽  
Jing Ying Zhang ◽  
Hong Jun Ai
Keyword(s):  
Adhesion Strength ◽  
Composite Coatings ◽  
Energy Dispersive Spectrometer ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Zn Content ◽  
Micro Arc Oxidation ◽  
Gel Technique ◽  
Bacteria Resistance

In order to improve the osteoblast growth and bacteria resistance, Zn-containing hydroxyapatite (Zn-HA) and titanium oxide (TiO2) composite coatings were prepared to improve binding between coating and Ti substrate. TiO2 film was prepared on the surface of Ti by micro-arc oxidation (MAO) and Zn-HA coating was deposited on TiO2 using sol–gel technique. Phase structure, composition and microstructure of the surface coatings were analyzed by X-ray diffraction (XRD) and Energy Dispersive Spectrometer (EDS), respectively. The adhesion strength between the coatings with different Zn content was measured by tensile testing. The results showed that there was no significant influence of Zn content on adhesion strength between coating and Ti substrate.

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