Characteristics of grain growth of microarc oxidation coatings on pure titanium

2005 ◽  
Vol 14 (12) ◽  
pp. 2598-2601 ◽  
Author(s):  
Wang Jian-Bo ◽  
Wu Han-Hua ◽  
Li Quan-Jun ◽  
Li Zhe-Kui ◽  
Gu Guang-Rui ◽  
...  
Keyword(s):  
Grain Growth ◽  
Pure Titanium ◽  
Microarc Oxidation

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

scholarly journals AntibacterialTiO2Coating Incorporating Silver Nanoparticles by Microarc Oxidation and Ion Implantation

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Peng Zhang ◽  
Zhiguo Zhang ◽  
Wei Li
Keyword(s):  
Antibacterial Activity ◽  
Ion Implantation ◽  
Bacterial Colonization ◽  
Pure Titanium ◽  
Microarc Oxidation ◽  
Optimal Strategies ◽  
Titanium Implants ◽  
Silver Ion ◽  
Antibacterial Ability ◽  
Replacement Surgery

Infection associated with titanium implants remains the most common serious complication in hard tissue replacement surgery. Since such postoperative infections are usually difficult to cure, it is critical to find optimal strategies for preventing infections. In this study, TiO2coating incorporating silver (Ag) nanoparticles were fabricated on pure titanium by microarc oxidation and ion implantation. The antibacterial activity was evaluated by exposing the specimens toStaphylococcus aureusand comparing the reaction of the pathogens to Ti-MAO-Ag with Ti-MAO controls. Ti-MAO-Ag clearly inhibited bacterial colonization more than the control specimen. The coating’s antibacterial ability was enhanced by increasing the dose of silver ion implantation, and Ti-MAO-Ag20.0 had the best antibacterial ability. In addition, cytocompatibility was assessed by culturing cell colonies on the specimens. The cells grew well on both specimens. These findings indicate that surface modification by means of this process combining MAO and silver ion implantation is useful in providing antibacterial activity and exhibits cytocompatibility with titanium implants.

Texture evolution during grain growth in recrystallized commercially pure titanium

2005 ◽  
Vol 397 (1-2) ◽  
pp. 346-355 ◽  
Author(s):  
N. Bozzolo ◽  
N. Dewobroto ◽  
T. Grosdidier ◽  
F. Wagner
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Commercially Pure

Study of Thermal Stability of Ultra Fine-Grained Commercially Pure Titanium Wire Prepared in Conform Equipment

2014 ◽  
Vol 782 ◽  
pp. 415-420 ◽  
Author(s):  
Tomas Kubina ◽  
Jaromir Dlouhý ◽  
Michal Kövér ◽  
Josef Hodek
Keyword(s):  
Activation Energy ◽  
Thermal Stability ◽  
Grain Growth ◽  
Pure Titanium ◽  
Extrusion Process ◽  
Recrystallization Temperature ◽  
Commercially Pure Titanium ◽  
Time Exponent ◽  
Titanium Wire ◽  
The Impact

Titanium and its alloys are frequently used in many sectors, including the health care sector, where they outperform other materials. From the biocompatibility viewpoint, the preferred condition of these materials is ultrafine or nanostructured state. Processes based on severe plastic deformation (SPD) that are capable of producing microstructures with sizes of the order of nanometers are gaining importance these days. Their typical limitation is the small volume of material processed. One of available ways to enhancing the productivity is to combine the CONFORM continuous extrusion process with the ECAP method. This paper describes initial experience with this combined process in the CONFORM 315i machine, which is equipped with a specially-designed forming die chamber. Influence the number of passes through CONFORM machine on thermal stability was study by horizontal dilatometer and heat-flux calorimeter. The impact of deformation on the shift in recrystallization temperature of pure titanium was confirmed. The microstructure evolution and the grain growth behavior were investigated by electron back scattered diffraction (EBSD) technique. The deformed UFG titanium was annealed at a range of temperature (400-600 °C) for up to 6 h. The grain growth kinetics was characterized by calculating the grain growth activation energy Q and the time exponent n based on the experimental results for deformed material. Data for annealing temperatures of 550 and 600 °C allowed the values of the time exponent n = 0.19 and activation energy Q = 248 kJ/mol were calculated.

Synthesis, corrosion, and wear resistance of a black microarc oxidation coating on pure titanium

2020 ◽  
Vol 386 ◽  
pp. 125454 ◽  
Author(s):  
Qiaoqin Guo ◽  
Dapeng Xu ◽  
Wei Yang ◽  
Yongchun Guo ◽  
Zhong Yang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Pure Titanium ◽  
Microarc Oxidation ◽  
Corrosion And Wear

Research on Growth Process and Microstructure of Microarc Oxidation Coating on Titanium

2011 ◽  
Vol 383-390 ◽  
pp. 1905-1909
Author(s):  
Shi Jie Li ◽  
Jie Hu ◽  
Xiao Ming Cao
Keyword(s):  
Phase Composition ◽  
Growth Process ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Pure Titanium ◽  
Microarc Oxidation ◽  
Titanium Substrate ◽  
Oxidation Time ◽  
Dense Ceramic ◽  
Micro Arc Oxidation

Porous ceramic layer was deposited on pure titanium substrate by micro-arc oxidation(MAO). XRD and SEM were employed to characterize the phase composition and microstructure of the film. The effects of micro-arc oxidation time on microstructure and phase composition of TiO2 coating were analysed. The results show that, with the increase of oxidation time, the number of micro-pores decreases, while the size of micro-pores, roughness and thickness of MAO coating increase.MAO coating shows dentrites grew, but not traditionally nucleation and grow. Oxidation coating growth inward, while at the same time to growth outward. Grow into a dense ceramic membrane layer inward, outward growth into the porous layer. The coating is mainly composed of Ti, anatase and the rutile phases.

scholarly journals In situ TEM observations of thickness effect on grain growth in pure titanium thin films

2021 ◽  
Vol 173 ◽  
pp. 110929
Author(s):  
Chaogang Ding ◽  
Wanji Chen ◽  
Shima Sabbaghianrad ◽  
Jie Xu ◽  
Debin Shan ◽  
...  
Keyword(s):  
Thin Films ◽  
Grain Growth ◽  
Pure Titanium ◽  
Thickness Effect ◽  
In Situ Tem ◽  
Titanium Thin Films
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