Electrodeposition of biomedical hydroxyapatite coatings on titanium alloy substrate

2003 ◽  
Vol 32 (5) ◽  
pp. 319-325 ◽  
Author(s):  
F. Hanna ◽  
Z.A. Hamid
Keyword(s):  
Titanium Alloy ◽  
Alloy Substrate ◽  
Hydroxyapatite Coatings ◽  
Titanium Alloy Substrate

Phases Transformations in Laser Treated Hydroxyapatite Coatings

1998 ◽  
Author(s):  
X. Ranz ◽  
T. Aslanian ◽  
L. Pawlowski ◽  
L. Sabatier ◽  
R. Fabbro
Keyword(s):  
Titanium Alloy ◽  
Sample Surface ◽  
Optical Microscope ◽  
Thermal Fields ◽  
Hydroxyapatite Coatings ◽  
Titanium Alloy Substrate ◽  
Plasma Sprayed ◽  
Different Content ◽  
Kinetics Of ◽  
Xrd Method

Abstract The hydroxyapatite Ca10(PO4)6OH2 (HAP) was plasma sprayed onto titanium alloy substrate. The samples having thickness of about 150 µm ware sprayed in a way to obtain two different content of crystalline HAP: 25 an 30 %. The coatings ware subsequently submitted to laser treatment with the CO2 laser. The treatment was carried out with different laser powers and scanning velocities and resulting thereof sample surface temperatures and the kinetics of the thermal fields ware monitored with a pyrometer. The XRD method enabled verification of the crystallinity state of HAP, content of amorphous calcium phosphate and the content of foreign phases. Optical microscope was used to check the microstructure and the depth of laser modified zone.

Interaction between plasma-sprayed coatings and a titanium alloy substrate

1976 ◽  
Vol 15 (2) ◽  
pp. 108-110 ◽  
Author(s):  
O. B. Chevela ◽  
A. S. Nagin ◽  
A. G. Cherdakli ◽  
V. N. Gadalov
Keyword(s):  
Titanium Alloy ◽  
Alloy Substrate ◽  
Plasma Sprayed Coatings ◽  
Titanium Alloy Substrate ◽  
Plasma Sprayed ◽  
Sprayed Coatings

Fabrication and Biocompatibility of Gradient Bioceramic Coatings on Titanium Alloy Substrate by Laser Cladding

2008 ◽  
Vol 368-372 ◽  
pp. 1203-1205 ◽  
Author(s):  
Min Zheng ◽  
Ding Fan ◽  
Xiu Kun Li ◽  
Qi Bin Liu ◽  
Wen Fei Li ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Laser Processing ◽  
Rare Earth Oxide ◽  
Processing Parameters ◽  
Alloy Substrate ◽  
Gradient Composition ◽  
Titanium Alloy Substrate ◽  
Bioceramic Coatings

Based on a high power CO2 laser beam passing by pyramid polygon mirror, the bioceramic coatings of gradient composition were fabricated on titanium alloy substrate (Ti-6Al-4V). The relations among laser processing parameters, microstructure and biocompatibility of the gradient bioceramic coatings were investigated. The results indicated that the contents of rare earth oxide additions had an immediate effect on the formation of bioactive phases. The gradient bioceramic coatings showed favorable biocompatibility in vivo after they were implanted into canine femur for 45, 90, and 180 days, respectively. The bioceramic coatings of Ca/P=1.4 and 0.6wt.% Y2O3 totally combined with new bones merely implanted for 45 days. Furthermore, the MTT (Methyl Thiazolyl Tetrazolium) colorimetry results of cell proliferation demonstrated that the cell growth distinctly increased on the gradient bioceramic coatings by laser cladding compared with the un-treated titanium alloy substrate.

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