scholarly journals Hydrothermal Microwave-Assisted Fabrication of Nanohydroxyapatite Powder and Optimization of Its Nanocomposite Coatings on Magnesium Alloy for Orthopedic Applications

ACS Omega ◽  
2021 ◽  
Author(s):  
Fakiha El-Taib Heakal ◽  
Yahia B. Sarhan ◽  
Maamoun A. Maamoun ◽  
Amira M. Bakry ◽  
Yasser K. Abdel-Monem ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Nanocomposite Coatings ◽  
Microwave Assisted ◽  
Orthopedic Applications

A novel and rapid route to synthesize polyvinyl alcohol/calcium phosphate nanocomposite coatings by microwave assisted deposition

2014 ◽  
Vol 135 ◽  
pp. 191-194 ◽  
Author(s):  
K. Thanigai Arul ◽  
J. Ramana Ramya ◽  
K.R. Karthikeyan ◽  
S. Narayana Kalkura
Keyword(s):  
Calcium Phosphate ◽  
Polyvinyl Alcohol ◽  
Nanocomposite Coatings ◽  
Microwave Assisted

Influence of Aliquat 336 on tribological properties of electroless ternary nanocomposite coatings on AZ91 alloy

2017 ◽  
Vol 232 (5) ◽  
pp. 613-621 ◽  
Author(s):  
Mohd Imran Ansari ◽  
Dineshsingh G Thakur
Keyword(s):  
Magnesium Alloy ◽  
Cationic Surfactant ◽  
Tribological Properties ◽  
Surface Engineering ◽  
Composite Coatings ◽  
Nanocomposite Coatings ◽  
Az91 Alloy ◽  
Aliquat 336 ◽  
Az91 Magnesium Alloy ◽  
Az91 Magnesium

Incorporation of fine nanoparticles and cationic surfactant (Aliquat 336) within an ENi–P matrix has given a new dimension to the field of nanocomposite coatings. It describes the surface engineering processes currently used for the protection of AZ91 magnesium alloy surface against wear, including electroless nano-composite coatings. The present work aims to investigate the influence of Aliquat 336 cationic surfactant on the microhardness and tribological properties of electroless (Ni–P–ZnO) ternary alloy nanocomposite coatings on AZ91 magnesium alloy substrate from acidic bath. The results revealed that there was a significant improvement in the microhardness and wear resistance of the coated surface by the addition of cationic surfactant at a concentration of 1.5 g/L as compared to the coating obtained without the addition of cationic surfactant in the chemical bath. These results are thus clearly indicative of the fact that the component of life of members made from substrate subjected to nanocomposite coatings with varying the concentration of surfactant can be greatly improved, thereby preventing early or regular failures, and increasing service life.

scholarly journals Microwave-Assisted Preparation of Zinc-Doped β-Tricalcium Phosphate for Orthopedic Applications

2020 ◽  
Author(s):  
Ali Taha Saleh ◽  
Dheyaa Alameri
Keyword(s):  
Tricalcium Phosphate ◽  
Degree Of Crystallinity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted ◽  
Ftir Spectrometer ◽  
Diffraction Peaks ◽  
Orthopedic Applications ◽  
The Degree Of Crystallinity ◽  
Good Agreement

A novel two-step methodology delivering zinc into the structure of β-tricalcium phosphate (β-TCP) has been investigated. Incorporating wet precipitation of calcium-deficient apatite [Ca9-xZnx(HPO4)(PO4)5(OH)] (x = 0.00–1.00 mol) using a microwave-assisted process followed by two-hour calcination at 1000 °C has been conducted to generate a ratio of 1.48 of Zn doped β-TCP. The products were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectrometer, and field emission scanning electron microscope (FESEM). Our results confirmed that the product was crystalline Zn2+-doped β-tricalcium phosphate. The incorporation of Zn+2 into the β-TCP lattice resulted in a shifting of diffraction peaks to higher 2θ values, which were attributed to the substitution of larger-sized Ca+2 ions with smaller-sized Zn2+ ions. A reduction in the intensity of the XRD peaks was also observed due to the reduction in the degree of crystallinity of the samples. Lattice parameters along the a and c-axis showed a gradual decrease in length with an increase in the amount of Zn2+ doping. This decrease was attributed to the replacement of Ca+2 ion by the smaller-sized Zn2+ ions. The microstructure of the powders consisted of microscale aggregates fused together. EDX analysis of all samples showed that the Zn2+ doping had successfully taken place and the amount of Zn2+ present in the samples was in good agreement with the theoretical values.

Smart rose flower like bioceramic/metal oxide dual layer coating with enhanced anti-bacterial, anti-cancer, anti-corrosive and biocompatible properties for improved orthopedic applications

RSC Advances ◽  
2015 ◽  
Vol 5 (104) ◽  
pp. 85831-85844 ◽  
Author(s):  
N. Murugan ◽  
L. Kavitha ◽  
E. Shinyjoy ◽  
D. Rajeswari ◽  
K. Vimala ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Metal Oxide ◽  
Cancer Treatment ◽  
Bone Cancer ◽  
Az91 Magnesium Alloy ◽  
Rose Flower ◽  
Anti Cancer ◽  
Az91 Magnesium ◽  
Orthopedic Applications ◽  
Layer Coating

The flower like Se,Mn-HAP/ZrO2 dual layer coating on AZ91 magnesium alloy satisfies the requirements in bone cancer treatment and signifies progress in the field of implant materials.

Microwave assisted deposition of hydroxyapatite coating on a magnesium alloy with enhanced corrosion resistance

2015 ◽  
Vol 159 ◽  
pp. 146-149 ◽  
Author(s):  
Sibo Shen ◽  
Shu Cai ◽  
Min Zhang ◽  
Guohua Xu ◽  
Yan Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Hydroxyapatite Coating ◽  
Microwave Assisted
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