In-situ fabrication of gradient titanium oxide ceramic coating on laser surface textured Ti6Al4V alloy with improved mechanical property and wear performance

Vacuum ◽  
2020 ◽  
Vol 176 ◽  
pp. 109327 ◽  
Author(s):  
Shuo Yuan ◽  
Naiming Lin ◽  
Jiaojuan Zou ◽  
Xiuzhou Lin ◽  
Zhiqi Liu ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Titanium Oxide ◽  
Ceramic Coating ◽  
Laser Surface ◽  
Ti6al4v Alloy ◽  
Oxide Ceramic ◽  
Wear Performance ◽  
In Situ Fabrication

Thermodynamics and Phase Constituents of Laser Induced In-Situ-Fabrication of TiB2 Ceramic Coating on Ti-6Al-4V

2013 ◽  
Vol 275-277 ◽  
pp. 2304-2307 ◽  
Author(s):  
Duo Zhang ◽  
Yu Ling Yang ◽  
Yi Ju
Keyword(s):  
Free Energy ◽  
Gibbs Free Energy ◽  
Laser Cladding ◽  
Ceramic Coating ◽  
Transformation Mechanism ◽  
Reaction Equation ◽  
In Situ Fabrication ◽  
Laser Cladding Process ◽  
Energy Theory

In-situ fabrication of TiB ceramic coating by laser cladding technology (LC) was investigated. Pulsed YAG laser with the power of 500 W was used. The mixture of Titanium powder (with the size of 20 m) and B powder (with the size of 140 m) were utilized as the precursor. The reactive transformation mechanism and phase constituents of the in-situ fabricating coating during the laser cladding process were studied by thermodynamics analysis, as well as XRD methods. Gibbs free energy theory was used to calculate the increment of Gibbs free energy at different temperature. The results show that the increment of the Gibbs free energy for the reaction equation to the in-situ fabricate TiB2 keep to be negative within the temperature of 3000K, this indicate that TiB2 can be obtained by laser cladding the mixture powder of Ti and B. XRD results show that the main phases of the coating are TiB2, TiO2 and B2O3 with relative percentage of 67.6%, 18.0% and 14.4%, respectively.

In situ fabrication of lithium titanium oxide by microwave-assisted alkalization for high-rate lithium-ion batteries

2013 ◽  
Vol 1 (47) ◽  
pp. 14849 ◽  
Author(s):  
Hyun-Kyung Kim ◽  
Jong-Pil Jegal ◽  
Ji-Young Kim ◽  
Seung-Beom Yoon ◽  
Kwang Chul Roh ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Titanium Oxide ◽  
Lithium Ion ◽  
High Rate ◽  
Microwave Assisted ◽  
In Situ Fabrication ◽  
Lithium Titanium Oxide ◽  
Lithium Titanium

Laser Cladding of Titanium Alloys with Ti+Al+C Powders

2012 ◽  
Vol 510 ◽  
pp. 738-741
Author(s):  
Jian Hong Wang ◽  
Pei Kang Bai ◽  
Zhen Lin Zhang ◽  
Yu Xin Li
Keyword(s):  
Wear Resistance ◽  
Titanium Alloys ◽  
Laser Cladding ◽  
Atomic Ratio ◽  
Laser Surface ◽  
Ti6al4v Alloy ◽  
Aluminum Powders ◽  
Al Content ◽  
Metallurgical Bonding

Laser surface cladding of Ti6Al4V alloy by Ti+Al+C powders (Titanium and carbon powders with an atomic ratio of 1:1 were mixed with 20-60wt.% aluminum powders) was investigated using CO2 laser. TiC particles were in situ formed mainly during the solidification and sizes of TiC particles were varied according to different contents of aluminum powders in the Ti+Al+C system. The results show that the coating had good metallurgical bonding with substrate when Al content was 20% or 40%. The microhardness of coating is 738HV0.5 which was 2 times as that of the Ti6Al4V alloy approximately. The wear resistance of TiC/Al ceramic layer was approximately 3 times greater than that of the Ti6Al4V substrate. 1

scholarly journals Rapid mechanochemical synthesis of polyanionic cathode with improved electrochemical performance for Na-ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xing Shen ◽  
Quan Zhou ◽  
Miao Han ◽  
Xingguo Qi ◽  
Bo Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Mechanochemical Synthesis ◽  
Cathode Materials ◽  
Industrial Application ◽  
Synthesis Process ◽  
In Situ Fabrication ◽  
Stationary Energy ◽  
Carbon Coated

AbstractNa-ion batteries have been considered promising candidates for stationary energy storage. However, their wide application is hindered by issues such as high cost and insufficient electrochemical performance, particularly for cathode materials. Here, we report a solvent-free mechanochemical protocol for the in-situ fabrication of sodium vanadium fluorophosphates. Benefiting from the nano-crystallization features and extra Na-storage sites achieved in the synthesis process, the as-prepared carbon-coated Na3(VOPO4)2F nanocomposite exhibits capacity of 142 mAh g−1 at 0.1C, higher than its theoretical capacity (130 mAh g−1). Moreover, a scaled synthesis with 2 kg of product was conducted and 26650-prototype cells were demonstrated to proof the electrochemical performance. We expect our findings to mark an important step in the industrial application of sodium vanadium fluorophosphates for Na-ion batteries.

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