The Influence of Plastic Deformation Performed before and after Electron Beam Irradiation on the Morphology and Structural Properties of UHMWPE

2015 ◽  
Vol 220-221 ◽  
pp. 627-632 ◽  
Author(s):  
Joanna Maszybrocka ◽  
Adrian Barylski ◽  
Jerzy Cybo
Keyword(s):  
Plastic Deformation ◽  
Electron Beam ◽  
Lamellar Structure ◽  
Electron Beam Irradiation ◽  
Crosslinking Density ◽  
Beam Irradiation ◽  
Input Material ◽  
Morphology And Structure ◽  
Before And After ◽  
Structural Tests

The paper presents changes in UHMWPE morphology and structure caused by irradiation with an electron beam and plastic deformation. The input material consisted of two grades of polyethylene, i.e. GUR 1050 and GUR 1020 (Poly Hi Solidur Medi TECH), used for producing the bearing components of endoprostheses applied in total joint alloplasty. Tests involved three groups of samples: the ones subjected to modification through radiation (N) only, those modified by plastic deformation before (ON) and after (NO) irradiation with an electron beam (N). The obtained variants were subjected to comprehensive morphological and structural tests, which made it possible to document changes in the lamellar structure (SEM) and orientation of the crystalline structure (SAXS) as well as to determine the content of the crystalline phase (DSC) and to define crosslinking density.

Comparison of Starch Characteristics from Pigmented and Non‐Pigmented Sorghum Cultivars before and after Electron Beam Irradiation

2020 ◽  
pp. 2000143
Author(s):  
Vivek Jaiswal ◽  
Kauslesh Pan Singh Rawat ◽  
Arijit Dutta Gupta ◽  
Vivek Bhadauria ◽  
Uttam Chavan ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Before And After

Color Change of Spodumene Gemstone by Electron Beam Irradiation

2013 ◽  
Vol 770 ◽  
pp. 370-373 ◽  
Author(s):  
Pannipa Noithong ◽  
Panee Pakkong ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Crystal Structure ◽  
Electron Beam ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Color Change ◽  
Crystal Structure Analysis ◽  
Beam Irradiation ◽  
Color Analysis ◽  
Before And After ◽  
Impurity Elements

Study on the electron beam irradiation color change induction of spodumene (LiAlSi2O6) samples, which color exhibit green, pink and colorless. Characteristic the electron-beam irradiation dose were selected 30,000 kGy, 40,000 kGy and 50,000 kGy. The color and fading of spodumene samples were analyzed by UV-VIS spectrophotometer , crystal structure were determined by X-ray diffraction (XRD) spectrometer, free radical species of impurities were determined by Electron Spin Resonance (ESR) spectrometer before and after irradiation. The results revealed the color of spodumene samples changed after irradiation, from green spodumene became a little darker color, pink spodumene became green color, colorless spodumene became pink to purple color the results of the color analysis and fading displayed on the CIE L* a* b* color system, color change spodumene samples were determined by values changed of a* and b*. Color fade of spodumene were determined by values changed of L*. The results of all samples crystal structure analysis were shown on the XRD patterns of the JCPDS No. 89-6662 (Spodumene) with monoclinic structure. The radical analysis results of impurity elements, green and pink only appear the ESR pattern of manganese (Mn2+), and chromium (Cr3+), respectively. It can be conclusion that intensity of color change depend on the irradiation dose and impurity elements in spodumene samples.

Effect of electron-beam irradiation before and after cooking on the chemical properties of beef, pork, and chicken

Meat Science ◽  
2008 ◽  
Vol 80 (3) ◽  
pp. 903-909 ◽  
Author(s):  
Joong-Ho Kwon ◽  
Youngju Kwon ◽  
Ki-Chang Nam ◽  
Eun Joo Lee ◽  
Dong U. Ahn
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Chemical Properties ◽  
Beam Irradiation ◽  
Before And After

Plastic Deformation and Micro-Fracture in SiO2 Induced by Electron Beam Irradiation

1991 ◽  
Vol 235 ◽  
Author(s):  
P. M. Ajayan ◽  
Sumio Iijima
Keyword(s):  
Plastic Deformation ◽  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Surface Charges ◽  
Video Recordings ◽  
Silica Fibers ◽  
Transmission Electron ◽  
Intense Electron Beam ◽  
The Many

ABSTRACTWe present here experimental results using transmission electron microscopy (TEM) and real time video recordings, of the many dynamic structural instabilities in amorphous silica structures during intense electron beam irradiation. It is observed that while the silica layers on oxidized silicon particles sinter when irradiated uniformly, they undergo necking and extensive plastic deformation when the beam is focused in the neck regions. Extremely thin silica fibers (less than five nanometers in diameter and microns in length) can be produced by the deformation of such necks between particles. The thin fibers and the sharp tips developed from the failure of such structures are seen to spheroidize and blunt when exposed to the electron beam. The instabilities are thought to arise from irradiation induced charging of the insulator surface which expands to reduce the density of accumulated surface charges.

Microstructural Modification of Brush-Plated Nanocrystalline Cr by High Current Pulsed Electron Beam Irradiation

2016 ◽  
Vol 41 ◽  
pp. 87-95 ◽  
Author(s):  
Jian Jun Hu ◽  
Lin Jiang Chai ◽  
Hong Bin Xu ◽  
Chao Ping Ma ◽  
Shu Bin Deng
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Thermal Stresses ◽  
Electron Beam Treatment ◽  
High Current ◽  
Beam Irradiation ◽  
Pulsed Electron Beam ◽  
Small Nodule ◽  
Before And After ◽  
Surface Microstructures

Cr layer was fabricated on 40Cr steel by electric brush plating process and then treated by high current pulsed electron beam irradiation technique. Surface microstructures of specimens before and after the irradiation were investigated. Results show that Cr surface is composed of uniformly distributed small nodule units which are composed of fine Cr particles smaller than 100nm. After high current pulsed electron beam treatment, many cracks are found on surface. The main reason is possibly due to the quasi-static thermal stresses accumulated along the surface of the specimens during the electron beam treatment. The surface grain grow from Cr particles because of heating by electron beam, and their size is less than 200nm.

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