scholarly journals Формирование состава и характеристик поверхности хромоникелевой стали 12Х18Н10Т при лазерном модифицировании в слое экспериментальной легирующей обмазки

2022 ◽  
Vol 92 (1) ◽  
pp. 84
Author(s):  
В.И. Проскуряков ◽  
И.В. Родионов
Keyword(s):  
Titanium Dioxide ◽  
Iron Carbide ◽  
Morphological Characteristics ◽  
High Strength ◽  
Graphite Phase ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Modified Surface ◽  
Diffraction Peaks ◽  
Modification Of The Surface

The results of an experimental study of laser pulsed modification of the surface of stainless steel 12CR18NI10T in a layer of alloying compound made of graphite paste and nanodispersed titanium dioxide powder (anatase) and without coating are presented. A comparative analysis of the effect of the coating on the elemental and phase compositions, morphological characteristics and microhardness of the modified surface is carried out. It was found that as a result of the treatment, the processes of cementation and oxidation of the surface occur, which made it possible to obtain a mixture of iron carbide and high-strength oxides in the surface layer of steel. In the samples that underwent laser treatment in the coating layer, an increase in the intensity of the diffraction peaks of the graphite phase and the formation of iron oxides Fe3O4 and chromium Cr2O3 with the presence of titanium dioxide TiO2 were revealed, which created a mixed heterophase metal oxide structure with increased mechanical strength. An increase in the microhardness of the modified surface after laser pulsed scanning in the layer of the experimental alloying compound is established.

scholarly journals Изменение характеристик поверхности стали 12Х18Н10Т при лазерном модифицировании в слое графитовой пасты, содержащей наночастицы диоксида титана

2021 ◽  
Vol 47 (10) ◽  
pp. 50
Author(s):  
В.И. Проскуряков ◽  
И.В. Родионов
Keyword(s):  
Stainless Steel ◽  
Titanium Dioxide ◽  
Diffusion Layer ◽  
Fine Particles ◽  
Experimental Studies ◽  
Pulse Voltage ◽  
Laser Modification ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Modification Of The Surface

Experimental studies of laser modification of the surface of 12Cr18Ni10T stainless steel in a layer of graphite paste and nanodispersed titanium dioxide powder (anatase) were carried out. It was established that as a result of laser pulsed processing, a microheterogeneous modifying layer is formed on the surface of the samples. The surface is characterized by increased microhardness and microroughness parameters, which depend to a greater extent on the pulse voltage. In the diffusion layer of the experimental samples, the formation of fine particles with sizes ranging from 100 to 300 nm was revealed

scholarly journals Population Balance Application in TiO2 Particle Deagglomeration Process Modeling

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3523
Author(s):  
Radosław Krzosa ◽  
Łukasz Makowski ◽  
Wojciech Orciuch ◽  
Radosław Adamek
Keyword(s):  
Particle Size ◽  
Titanium Dioxide ◽  
Mechanistic Model ◽  
Population Balance ◽  
Tio2 Particle ◽  
Application Process ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Computational Fluid Dynamics Cfd ◽  
Hydrodynamic Stresses

The deagglomeration of titanium-dioxide powder in water suspension performed in a stirring tank was investigated. Owing to the widespread applications of the deagglomeration process and titanium dioxide powder, new, more efficient devices and methods of predicting the process result are highly needed. A brief literature review of the application process, the device used, and process mechanism is presented herein. In the experiments, deagglomeration of the titanium dioxide suspension was performed. The change in particle size distribution in time was investigated for different impeller geometries and rotational speeds. The modification of impeller geometry allowed the improvement of the process of solid particle breakage. In the modelling part, numerical simulations of the chosen impeller geometries were performed using computational-fluid-dynamics (CFD) methods whereby the flow field, hydrodynamic stresses, and other useful parameters were calculated. Finally, based on the simulation results, the population-balance with a mechanistic model of suspension flow was developed. Model predictions of the change in particle size showed good agreement with the experimental data. Using the presented method in the process design allowed the prediction of the product size and the comparison of the efficiency of different impeller geometries.

Study on the Dispersion of Carbon Doped Titanium Dioxide Powder in Aqueous Solution

2013 ◽  
Vol 788 ◽  
pp. 246-249 ◽  
Author(s):  
Zhi Wang ◽  
Zhi Qiang Yang
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Ph Value ◽  
Mass Ratio ◽  
Carbon Doped ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Ultrasonic Time ◽  
Dispersant Additive ◽  
Doped Titanium Dioxide

The dispersion of carbon doped titanium dioxide (TiO2) powder in aqueous solution was studied. The spectrophotometer method was used to determine the effects of dispersant additive ratio, ultrasonic time and pH value on the dispersion of TiO2. The results show that the carbon doped titanium dioxide aqueous solution was found to have the optimum dispersion performance when the mass ratio of sodium hexametaphosphate (SHMP)/TiO2/water is 1:50:100, the ultrasonic time is 15min and the pH value of the solution is 10.

Plasma Induced Grafting of PMMA onto Titanium Dioxide Powder

2005 ◽  
Vol 7 (4) ◽  
pp. 2955-2958 ◽  
Author(s):  
Zhong Shaofeng ◽  
Meng Yuedong ◽  
Ou Qiongrong ◽  
Xu Xu
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder

scholarly journals Lead ions sorption using magnetically modified sorbent based on titanium dioxide powder

2018 ◽  
Vol 5 ◽  
pp. S61-S70
Author(s):  
Jana Seidlerová ◽  
Oldřich Motyka ◽  
Klára Drobíková ◽  
Ivo Šafařík
Keyword(s):  
Titanium Dioxide ◽  
Lead Ions ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder

EFFECTS OF PHOTOCATALYTIC REACTIONS ON MARINE PLANKTON: TITANIUM DIOXIDE POWDER AS CATALYST ON THE BODY SURFACE

2001 ◽  
Vol 36 (7) ◽  
pp. 1419-1425 ◽  
Author(s):  
Shuji Matsuo ◽  
Yasuhiro Anraku ◽  
Sunao Yamada ◽  
Tsuneo Honjo ◽  
Taku Matsuo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Body Surface ◽  
The Body ◽  
Marine Plankton ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Photocatalytic Reactions
Sign in / Sign up

Export Citation Format

Share Document