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

2008 ◽  
pp. 1203-1205
Author(s):  
Min Zheng ◽  
Ding Fan ◽  
Xiu Kun Li ◽  
Qi Bin Liu ◽  
Wen Fei Li ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Alloy Substrate ◽  
Titanium Alloy Substrate ◽  
Bioceramic 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.

Microstructure and Thermal Behavior of Gradient Bioceramic Coatings Fabricated by Laser Cladding on Titanium Alloy

2008 ◽  
Vol 373-374 ◽  
pp. 710-713
Author(s):  
Min Zheng ◽  
Ding Fan ◽  
Xiu Kun Li ◽  
Qi Bin Liu ◽  
Jian Bin Zhang
Keyword(s):  
Titanium Alloy ◽  
Thermal Behavior ◽  
Processing Parameters ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Alloy Substrate ◽  
Thermal Gravimetry ◽  
Titanium Alloy Substrate ◽  
Increasing Temperature ◽  
Bioceramic Coatings

Based on a high power CO2 laser beam passing by an integral mirror, the bioceramic coatings of gradient composition were designed and fabricated on titanium alloy substrate (Ti-6Al-4V). The relations among laser processing parameters, microstructure and thermal behavior of the gradient bioceramic coatings were investigated. The morphology of the composites was observed by scanning electron microscope (SEM). Phase composition of the coatings was analyzed by X-ray diffraction (XRD). And the thermal behavior of raw powders was evaluated through thermal gravimetry and differential scanning calorimetry (TG-DSC) test. The results demonstrated that the bioceramic coatings were metallurgically bonded to the titanium alloy substrate. The bioceramic coatings contained such bioactive phases as HA and β-TCP, which offered an advantageous condition for osseo-connection. The DSC thermograms showed the endothermic peaks at different temperature, which resulted from the different transitions process, respectively. Furthermore, the DSC results were in accordance with TG data of the powders and showed that with the increasing temperature the weight of sample accordingly decreased.

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

Laser Cladding of Fluoridated Hydroxyapatite Coatings on Titanium Alloy for Bone Replacement Structures

2013 ◽  
Vol 815 ◽  
pp. 540-546
Author(s):  
An Guo Huang ◽  
Yuan Liu ◽  
Shu Hui Hu ◽  
Qing Hua Wang ◽  
Li Ling Zhen
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Ti Alloy ◽  
X Ray Diffraction ◽  
Bioactive Coatings ◽  
X Ray ◽  
Fluoridated Hydroxyapatite ◽  
Hydroxyapatite Coatings ◽  
Lower Solubility ◽  
Bioceramic Coatings

Bone-like fluoridated hydroxyapatite (FHA) coatings were prepared on Ti-6Al-4V substrates (TC4) by using laser cladding. This bioceramic coating was fabricated by adding CaF2 micron-particles into the hydroxyapatite before presetted on the Ti alloy substrate and radiated by laser beam which aimed at obtaining lower solubility, fine thermostability and maintaining the comparable bioactivity and biocompatibility. Coatings, which were processed using a Nd:YAG laser cladding, presented FHA crystallization on the surface with a uniform morphology along the coating cross-section and no significant dilution of the titanium alloy was observed. Phase analysis by X-ray diffraction indicated the generation of fluoridated hydroxyapatite phase in the laser cladded coatings. The coatings showed the formation of a metallurgically sound and diffused substrate-coating interface, which significantly increased bonding strength between the coatings and subtrate. The bioactive coatings afforded favourable bone bioactivity by inducing the rapid precipitation of apatite on their surface when immersed in a simulated body fluid (SBF). The work demonstrated the potential of using laser cladding for fabricating fluoridated hydroxyapatite bioceramic coatings on Ti alloy.

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