Laser surface remelting of plasma sprayed nanostructured Al2O3–13wt%TiO2 coatings on titanium alloy

2009 ◽  
Vol 255 (20) ◽  
pp. 8603-8610 ◽  
Author(s):  
Y. Wang ◽  
C.G. Li ◽  
W. Tian ◽  
Y. Yang
Keyword(s):  
Titanium Alloy ◽  
Laser Surface ◽  
Laser Surface Remelting ◽  
Tio2 Coatings ◽  
Plasma Sprayed

Bioactivity of Plasma-Sprayed TiO2 Coating in Simulated Body Fluid by Hydrofluoric Acid Treatment

2006 ◽  
Vol 510-511 ◽  
pp. 13-16
Author(s):  
Xiao Bing Zhao ◽  
Xuan Yong Liu ◽  
Chuan Xian Ding
Keyword(s):  
Titanium Alloy ◽  
Simulated Body Fluid ◽  
Hydrofluoric Acid ◽  
Body Fluid ◽  
Acid Treatment ◽  
Atmospheric Plasma ◽  
X Ray ◽  
Tio2 Coatings ◽  
Plasma Sprayed

TiO2 coatings on titanium alloy substrates were prepared by atmospheric plasma spraying using commercial nano-powders. Then, as-sprayed coatings were treated using 10% hydrofluoric acid (HF) at room temperature for 30 seconds. As-sprayed and HF-treated titania coatings were soaked in simulated body fluid to investigate the formation of apatite on their surface. Field-emission scanning electron microscopy was used to observe the surface morphologies, and the phase composition of the as-sprayed coating and apatite were analyzed by X-ray diffraction and energy-dispersive X-ray spectrometry. As-sprayed titania coating is composed of rutile, anatase, and a small quantity of Ti3O5. It exhibited excellent adhesion between the TiO2 coatings and titanium alloy substrates, and the bonding strength was about 38 MPa. After in vitro experiment, a new substance containing calcium and phosphate was formed on the surface of HF-treated TiO2 coatings after being soaked in SBF, while the new substance was not formed on the surface of as-sprayed TiO2 coatings. The results indicated that the bioactivity can be induced to the surface of plasma sprayed TiO2 coatings by hydrofluoric acid treatment.

Study on laser surface remelting of plasma-sprayed Al–Si/1wt% nano-Si3N4 coating on AZ31B magnesium alloy

2013 ◽  
Vol 273 ◽  
pp. 122-127 ◽  
Author(s):  
Yaqiong Ge ◽  
Wenxian Wang ◽  
Xin Wang ◽  
Zeqin Cui ◽  
Bingshe Xu
Keyword(s):  
Magnesium Alloy ◽  
Laser Surface ◽  
Az31b Magnesium Alloy ◽  
Laser Surface Remelting ◽  
Plasma Sprayed

Laser remelting of plasma-sprayed conventional and nanostructured Al2O3–13wt.%TiO2 coatings on titanium alloy

2010 ◽  
Vol 506 (1) ◽  
pp. 356-363 ◽  
Author(s):  
Chonggui Li ◽  
You Wang ◽  
Lixin Guo ◽  
Junqi He ◽  
Zhaoyi Pan ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Remelting ◽  
Tio2 Coatings ◽  
Plasma Sprayed

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.

scholarly journals Improvement of Laser Transmission Welding of Glass with Titanium Alloy by Laser Surface Treatment

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2060
Author(s):  
Pin Li ◽  
Xingwen Xu ◽  
Wensheng Tan ◽  
Huixia Liu ◽  
Xiao Wang
Keyword(s):  
Free Energy ◽  
Titanium Alloy ◽  
Surface Treatment ◽  
Surface Free Energy ◽  
Laser Surface ◽  
Tensile Fracture ◽  
Laser Surface Treatment ◽  
Laser Transmission Welding ◽  
Fracture Failure ◽  
Welding Strength

Laser surface treatment of the titanium alloy was locally oxidized on the metal surface to improve the joint strength of laser transmission welding of high borosilicate glass with titanium alloy. The results find that the welding strength was increased 5 times. The welding mechanism was investigated by the morphology of the welded parts, the tensile-fracture failure mode, the diffusion of the interface elements, and the surface free energy. The results show that there are many adherents between the titanium alloy and high borosilicate glass after tensile fracture, the welding strength was higher when the laser voltage was 460 V, and the tensile–fracture failure mode is mainly ductile fracture. Element-line scanning analysis revealed that elemental diffusion occurred in the two materials, which is an important reason for the high welding strength. Surface free-energy analysis shows that laser surface treatment improves the surface free energy of titanium alloy, promotes the wettability and compatibility, and increases the welding strength of titanium alloy with glass.

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