Characterization and corrosion behavior of plasma sprayed calcium silicate reinforced hydroxyapatite composite coatings for medical implant applications

2021 ◽  
Vol 47 (1) ◽  
pp. 782-792
Author(s):  
Jarnail Singh ◽  
Sukhpal Singh Chatha ◽  
Hazoor Singh
Keyword(s):  
Corrosion Behavior ◽  
Calcium Silicate ◽  
Composite Coatings ◽  
Medical Implant ◽  
Hydroxyapatite Composite ◽  
Plasma Sprayed

scholarly journals Enhanced Scratch Performance of Plasma Sprayed Hydroxyapatite Composite Coatings Reinforced with BN Nanoplatelets

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 652
Author(s):  
Yao Chen ◽  
Jia Ren ◽  
Weiwei Liu ◽  
Dong Zhao
Keyword(s):  
Hexagonal Boron Nitride ◽  
Dominant Role ◽  
Composite Coatings ◽  
Surface Damage ◽  
Lateral Force ◽  
Ha Coating ◽  
Hydroxyapatite Composite ◽  
Brittle Fractures ◽  
Plasma Sprayed

In recent years, research on hydroxyapatite (HA) coatings has been driven by the demands of clinical applications. However, the intrinsic brittleness of HA limits its potential in the use for the load-bearing implant. To improve mechanical properties of the HA coating itself, a HA composite coating reinforced with hexagonal boron nitride nanoplatelets (BNNP) was fabricated using plasma spray, and its scratch behavior was investigated in this research. Typical brittle fractures such as microcracks both in and beyond the residual groove and material chipping were observed in the HA coating, while stronger and tougher BNNP/HA coatings exhibited a dominant role in protecting them from scratch damage through resisting plastic deformation and brittle microfracturing. Moreover, easier grain sliding within a splat and splat sliding at the splat boundaries due to the presence of BNNPs, and the nature porosity at different length scales of the as-sprayed HA composite coatings would provide significant self-lubricating effects to reduce the lateral force during scratching and alleviate the contact damage. Therefore, the addition of BNNPs renders HA coating with low scratch friction and enhanced tolerance to surface damage, which is naturally beneficial for the long-term durability and reliability of the implants.

Anticorrosive effects and in vitro cytocompatibility of calcium silicate/zinc-doped hydroxyapatite composite coatings on titanium

2015 ◽  
Vol 357 ◽  
pp. 1776-1784 ◽  
Author(s):  
Yong Huang ◽  
Honglei Zhang ◽  
Haixia Qiao ◽  
Xiaofeng Nian ◽  
Xuejiao Zhang ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Composite Coatings ◽  
Hydroxyapatite Composite

Plasma Sprayed Zirconia-Hydroxyapatite Composite Coatings

2006 ◽  
pp. 631-634 ◽  
Author(s):  
M.M. Aydın ◽  
L.S. Ozyegin ◽  
Faik N. Oktar ◽  
E.Z. Erkmen ◽  
O. Anzabi ◽  
...  
Keyword(s):  
Composite Coatings ◽  
Hydroxyapatite Composite ◽  
Plasma Sprayed

Studies and Research on the Corrosion Behavior of Ni-Al2O3 Compound Coatings Obtained by Electrochemical Methods

2020 ◽  
Vol 43 (3) ◽  
pp. 21-25
Author(s):  
Simona BOICIUC ◽  
◽  
◽  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Corrosion Behaviour ◽  
Composite Coatings ◽  
Point Of View ◽  
Electrochemical Methods ◽  
Dispersed Phase ◽  
Nickel Matrix ◽  
Technical Alumina ◽  
Compound Coatings

The undertaken research which is described in this paper aims at the corrosion behaviour of composite coatings in nickel matrix using as dispersed phase technical alumina with dimensions of 5 μm and their characterization from a microstructural point of view. The corrosion resistance in the saline fog of the coatings is influenced by the microstructure, the stresses developed in the layer and the roughness.

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