Experimental Study on Friction Characteristics of Micro-Arc Oxidation Modified Layer on Titanium Alloy Surface

2020 ◽  
Vol 990 ◽  
pp. 44-49
Author(s):  
Xing Sheng Lao ◽  
Xu Feng Zhao ◽  
Yong Liu ◽  
Chun Hui Dai ◽  
Wei Jian Lv
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Surface Treatment ◽  
Microarc Oxidation ◽  
Alloy Substrate ◽  
Tc4 Titanium Alloy ◽  
Micro Arc Oxidation ◽  
Titanium Alloy Substrate ◽  
Modification Treatment ◽  
Oxidation Surface

In order to study the effect of microarc oxidation modification treatment on the friction properties of titanium alloy surface, the surface treatment layer of Ti-6Al-4V ELI specimen modified by Microarc oxidation surface was sampled, the surface layer hardness, roughness and treatment layer thickness were tested, the microscopic morphology was analyzed, The friction tests of TC4 substrate and micro-arc oxidation treatment surface disc with 25% glass fiber, 15% fiberglass +5% graphite and 60% tin bronze reinforced PTFE pin were carried out, and the results showed that the thickness increased slightly and the surface layer hardness increased by about 75% after the micro-arc oxidation surface modification treatment. Compared with the substrate, the surface roughness is obviously improved, and the friction coefficient of the surface treatment specimen is similar to that of the TC4 titanium alloy substrate, but the wear amount is higher than that of the TC4 titanium alloy substrate.

Reactive Electric Spark Deposition of Ti(CN)–Based Ceramics Coating on Titanium Alloy Substrate

2008 ◽  
Vol 368-372 ◽  
pp. 1313-1315 ◽  
Author(s):  
Jian Jun Hao ◽  
Zhi Guo Pu ◽  
Hong Jie Liu ◽  
Jian Guo Zhao
Keyword(s):  
Titanium Alloy ◽  
Graphite Electrode ◽  
Single Pulse ◽  
Ceramic Particle ◽  
Dendritic Crystal ◽  
Alloy Substrate ◽  
Tc4 Titanium Alloy ◽  
Average Grain Size ◽  
Titanium Alloy Substrate ◽  
Pulse Deposition

Ti(CN) -based ceramics coating was deposited on TC4 titanium alloy substrate using the home- made reactive electric spark deposition system, which is under nitrogen-sealed atmosphere and using the graphite electrode. It was showed that: (1) the single-pulse deposition zone presents irregular spattering shape and the phase of coatings was made up of TiC0.51N0.12 spherocrystal and dendritic crystal, Ti0.80V0.20 and C, (2) metallurgical bond between coating and substrate is realized, (3) the Ti(CN) ceramic particle, whose average grain size is 626nm, distributes dispersively among the coating and is in-situ synthesized by the reaction among titanium from the substrate, carbon from the graphite electrode and nitrogen from the shielding nitrogen gas.

Effects of Surface Treatment on Photocattalytic Activity of TiO2 Coatings Using Microarc-Oxidation

2012 ◽  
Vol 454 ◽  
pp. 26-29
Author(s):  
Hui Dong Su ◽  
Zhong Hua Shi
Keyword(s):  
Acetic Acid ◽  
Surface Treatment ◽  
Photocatalytic Degradation ◽  
Titanium Oxide ◽  
Degradation Rate ◽  
Microarc Oxidation ◽  
Oxide Coatings ◽  
Photocatalytic Ability ◽  
Before And After ◽  
Micro Arc Oxidation

Titanium oxide coatings （Ti/TiO2）were formed on the titanium net surface by micro-arc oxidation(MAO) in Na3PO4 solution using an AC power supply. Then the titanium oxide coatings were treated by acetic acid or La(NO3)3 aqueous solution to improve its activity. The structures and photocatalytic ability of titanium oxide coatings before and after surface treatment were characterized and evaluated by XRD, SEM, EDX. It was found that the titanium oxide film is mainly made of titanium and anatase .When acetic acid aqueous concentration is 0.1mol•L-1 and soak time is 6 hour ,the Ti/TiO2 films photocatalytic degradation rate increased from 15% to 33.6%. When La(NO3)3 aqueous concentration is 0.1mol•L-1 and soak time is 12 hour, the Ti/TiO2 films photocatalytic degradation rate increased from 15% to 34.8%.

Study on Rare Earth Catalysis in the Boriding Process to Titanium Alloy

2011 ◽  
Vol 48-49 ◽  
pp. 1177-1181
Author(s):  
Feng Hua Li ◽  
Xiao Hong Yi ◽  
Jing Lei Zhang ◽  
Zhan Guo Fan
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Rare Earth ◽  
Phase Composition ◽  
Diffusion Layer ◽  
Alloy Surface ◽  
Tc4 Titanium Alloy ◽  
Boriding Process

Solid powder boriding experiment was carried out on TC4 titanium alloy surface with method of RE(rare earth)-boriding at the temperature of over 1000°C. By means of XRD, SEM and EDS, phase composition, microstructure and morphology of TC4 titanium alloy after RE-boriding were investigated. The effect of rare earth on phase composition was discussed. Results of the experiment showed that the diffusion layer was composed of top-layer TiB2 and sub-layer TiB whiskers with the highest thickness being 25μm. The XRD results revealed TiB-TiB2 biphasic B-Ti compounds layer formed on the surface of TC4 after RE-boriding. The high content of B and Ce in the surface layer showed rare earth increased the absorption and concentration of B atoms.

scholarly journals Enhanced Cell Integration to Titanium Alloy by Surface Treatment with Microarc Oxidation: A Pilot Study

2009 ◽  
Vol 467 (9) ◽  
pp. 2251-2258 ◽  
Author(s):  
Young Wook Lim ◽  
Soon Yong Kwon ◽  
Doo Hoon Sun ◽  
Hyoun Ee Kim ◽  
Yong Sik Kim
Keyword(s):  
Titanium Alloy ◽  
Pilot Study ◽  
Surface Treatment ◽  
Microarc Oxidation

Influence of Voltage on the Biological Performance of Micro-Arc Oxide Films Based on TC4 Titanium Alloy

2016 ◽  
Vol 697 ◽  
pp. 612-616
Author(s):  
Ji Kang Yan ◽  
Yuan Teng ◽  
Er Xin Ni ◽  
Yun Feng Wu ◽  
Yan Hua Sun ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Bone Tissue ◽  
Bone Cells ◽  
Porous Ceramic ◽  
Animal Experiments ◽  
Oxide Films ◽  
Biological Properties ◽  
Ceramic Surface ◽  
Tc4 Titanium Alloy ◽  
Micro Arc Oxidation

The porous ceramic biologic films were prepared on the surface of Ti6Al4V (TC4) with micro-arc oxidation technology (MAO). The phase composition, microstructure and valence state of micro-arc oxide films were studied. The biological properties of the ceramic film were comprehensive evaluated through animal experiments. Results show that with increasing of the micro-arc oxidation voltage, the better biocompatible hydroxyapatite appears on the surface of titanium alloy (TC4). The high voltage promotes the surface pore size enlarge. The porous ceramic surface makes bone tissue early grow up. Pathological sections of bone tissue 24 w animal experiments indicates that the implants can form good biological combination with bone, no rejection and the higher the micro-arc oxidation voltage, the more new bone cells.

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
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