scholarly journals Preparation and Electron-Beam Surface Modification of Novel TiNi Material for Medical Applications

2021 ◽  
Vol 11 (10) ◽  
pp. 4372
Author(s):  
Sergey G. Anikeev ◽  
Anastasiia V. Shabalina ◽  
Sergei A. Kulinich ◽  
Nadezhda V. Artyukhova ◽  
Daria R. Korsakova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Material Surface ◽  
High Current ◽  
New Materials ◽  
New Approach ◽  
Pulsed Electron Beam ◽  
Beam Surface ◽  
Compositional Changes ◽  
Unmodified Sample ◽  
Mcf 7

A new approach to fabricate TiNi surfaces combining the advantages of both monolithic and porous materials for implants is used in this work. New materials were obtained by depositing a porous TiNi powder onto monolithic TiNi plates followed by sintering at 1200 °C. Then, further modification of the material surface with a high-current-pulsed electron beam (HCPEB) was carried out. Three materials obtained (one after sintering and two after subsequent beam treatment by 30 pulses with different pulse energy) were studied by XRD, SEM, EDX, surface profilometry, and by means of electrochemical measurements, including OCP and EIS. Structural and compositional changes caused by HCPEB treatment were investigated. Surface properties of the samples during their storage in saline for 10 days were studied and a model experiment with cell growth (MCF-7) was carried out for the unmodified sample with an electron beam to detect cell appearance on different surface locations.

scholarly journals Preparation and Electron-Beam Surface Modification of Novel TiNi Material for Medical Applications

2021 ◽  
Author(s):  
Sergey G. Anikeev ◽  
Anastasiia V. Shabalina ◽  
Sergei A. Kulinich ◽  
Nadezhda V. Artyukhova ◽  
Darya R. Korsakova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Model Experiment ◽  
Material Surface ◽  
High Current ◽  
New Materials ◽  
New Approach ◽  
Pulsed Electron Beam ◽  
Beam Surface ◽  
Compositional Changes ◽  
Mcf 7

A new approach to fabricate TiNi surfaces combining the advantages of both monolithic and porous materials for implants is used in this work. New materials were obtained by depositing a porous TiNi powder onto monolithic TiNi plates followed by sintering at 1200°C. Then, further modification of the material surface with a high-current-pulsed electron beam (HCPEB) was carried out. Three materials obtained (one after sintering and two after subsequent beam treatment by 20 and 30 pulses, respectively) were studied by XRD, SEM, EDX, EIS methods, profilometry and OCP measurements. Structural and compositional changes caused by HCPEB treatment were investigated. Surface properties of the samples during their storage in saline for 10 days were studied and a model experiment with cell growth (MCF-7) was carried out for the sample unmodified with electron beam to detect cell appearance on different surface locations.

scholarly journals Evolution of Microstructure at the Surface of 40CrNiMo7 Steel Treated by High-Current Pulsed Electron Beam

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 311 ◽  
Author(s):  
Huihui Wang ◽  
Lianfu Li ◽  
Sen Qiu ◽  
Weidong Zhai ◽  
Qiaomin Li ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Surface Modification ◽  
Electron Beam ◽  
Cooling Rate ◽  
Surface Composition ◽  
Material Surface ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Modified Surface ◽  
Average Size

High current pulsed electron beam (HCPEB) has recently been developed as an effective technique of material surface modification. In this research, a self-developed HCPEB equipment (HOPE-I) was adopted to perform surface modification on quenched and tempered 40CrNiMo7 steel. A composite nanometer structure was formed on the modified surface layer, and the martensite transformation and the dissolution and fracture of cementite can be observed. After initial irradiation, the high cooling rate caused the formation of nanocrystalline on the surface. With continuous irradiation treatments, the cooling rate gradually reduced, while the carbon kept dissolving and ended with surface composition homogenization. Both competitive factors result in the evolution rule of nanometer dimensions of surface structure. After HCPEB treatment, the average size of austenite phase on the modified surface decreased from micron-sized to nanoscale. The corrosion rate decreased from 0.12 mm/a to 0.02 mm/a, showing remarkable improvement of corrosion resistance. The main factors of the improvements of corrosion resistance property are the flat, dense structured and preferred crystal orientation on the modification layer of the treated material surface.

Grain Refinement and Hardening Induced by Heavy Deformation Using Low Energy High Current Pulsed Electron Beam Surface Treatment

2010 ◽  
Vol 667-669 ◽  
pp. 499-504 ◽  
Author(s):  
Thierry Grosdidier ◽  
Y. Samih ◽  
Nathalie Allain-Bonasso ◽  
Bernard Bolle ◽  
Z.X. Zou ◽  
...  
Keyword(s):  
Grain Size ◽  
Electron Beam ◽  
Pulse Electron Beam ◽  
Low Energy ◽  
Temperature Fields ◽  
Material Surface ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Size Refinement ◽  
Texture Modification

The low energy high current pulse electron beam (LEHCPEB) irradiation induces ultra fast dynamic temperature fields in the surface of the material to which is associated dynamic stress fields that causes intense deformation at the material surface and sub-surface. Improved surface properties (hardness, corrosion resistance) can be obtained using the LEHCPEB treatment. Under the “Melting” mode, the top surface (few µm) which is melted and rapidly solidified (107 K/s), can solidify has nano-domains formed from the highly under-cooled melt. The thermal stress wave that propagates in the sub-surface imposes strain hardening and grain size refinement. This induces a sub-surface hardening that can extent over about 100 µm. The use of the “Heating” mode is less conventional. This mode can promote grain size refinement, hardening as well as texture modification without modification of the sample geometry.

Surface Modification of Pure Titanium by High Current Pulsed Electron Beam

2012 ◽  
Vol 560-561 ◽  
pp. 994-999
Author(s):  
Jie Cai ◽  
Ming Zhen Wan ◽  
Yang Zou ◽  
Peng Lv ◽  
Zhi Yong Han ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Surface Modification ◽  
Electron Beam ◽  
Pure Titanium ◽  
Optical Microscope ◽  
Material Surface ◽  
Material Strength ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Transmission Electron

Polycrystalline pure titanium was irradiated by high-current pulsed electron beam (HCPEB). The microstructure changes and material strength were investigated by using microhardness tester, optical microscope, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) technique. The experimental results indicate that many craters are inevitably formed on the irradiated surface. The eruption of the craters makes the material surface cleaned, which can improve the corrosion resistance of materials. Furthermore, martensitic structure, ultra-fine grains and high-density dislocations are formed on the irradiated surface, which increase the hardness of the treated samples. The microhardness of 20-pulsed sample reaches 286Hv, which is 71% higher than the initial sample. Martensitic transformation, grain refinement and dislocation strengthening induced by HCPEB treatment are the dominating mechanism for the improvements of material strength. It is suggested that HCPEB technique is becoming an effective approach to surface modification for pure titanium and titanium alloy.

The structure and properties of boron carbide ceramics modified by high-current pulsed electron-beam

2016 ◽  
Author(s):  
Yuri Ivanov ◽  
Oleg Tolkachev ◽  
Maria Petyukevich ◽  
Anton Teresov ◽  
Olga Ivanova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Boron Carbide ◽  
Structure And Properties ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Carbide Ceramics
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