Anodically oxidised aluminium layer as a useful substrate for the fabrication of147Pm sources for beta-ray thickness gauges

1997 ◽  
Vol 223 (1-2) ◽  
pp. 79-81 ◽  
Author(s):  
P. S. Balasubramanian
Keyword(s):  
Aluminium Layer

scholarly journals The Influence of the Asymmetric Arb Process on the Properties of Al-Mg-Al Multi-Layer Sheets / Wpływ Asymetrii W Procesie Arb Na Właściwości Wielowarstwowych Blach Al-Mg-Al

2015 ◽  
Vol 60 (4) ◽  
pp. 2821-2826 ◽  
Author(s):  
A. Wierzba ◽  
S. Mróz ◽  
P. Szota ◽  
A. Stefanik ◽  
R. Mola
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Strength ◽  
Rolling Process ◽  
Asymmetry Factor ◽  
Relative Reduction ◽  
Test Results ◽  
Initial Thickness ◽  
Asymmetric Rolling ◽  
Aluminium Layer

The paper presents the results of the experimental study of the three-layer Al-Mg-Al sheets rolling process by the ARB method. The tests carried out were limited to single-pass symmetric and asymmetric rolling processes. An Al-Mg-Al package with an initial thickness of 4 mm (1-2-1 mm) was subjected to the process of rolling with a relative reduction of 50%. To activate the shear band in the strip being deformed, an asymmetry factor of av=2 was applied. From the test results, an increase in the tensile strength of the multi-layer Al-Mg-Al sheets obtained from the asymmetric process was observed. Microhardness tests did not show any significant differences in aluminium layer between respective layers of sheets obtained from the symmetric and the asymmetric process. By contrast, for the magnesium layer, an increase in microhardness from 72 HV to 79 HV could be observed for the asymmetric rolling. The analysis of the produced Al-Mg-Al sheets shows that the good bond between individual layers and grain refinement in the magnesium layer contributed to the obtaining of higher mechanical properties in the multi-layer sheets produced in the asymmetric process compared to the sheets obtained from the symmetric process.

Absorption Spectroscopy Of A Radiatively Heated Aluminium Layer

1989 ◽  
Author(s):  
C. Chenais-Popovics ◽  
C. Fievet ◽  
J. P. Geindre ◽  
J. C. Gauthier ◽  
E. Luc-Koenig ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Aluminium Layer

Impurity Removing at Dislocations in Float Zone Silicon by Aluminium-Silicon Alloying

1997 ◽  
Vol 469 ◽  
Author(s):  
I. Perichaud ◽  
S. Martinuzzi
Keyword(s):  
Electrical Activity ◽  
Front Surface ◽  
Mapping Technique ◽  
Induced Current ◽  
Standard Samples ◽  
Aluminium Layer ◽  
X Ray ◽  
Float Zone ◽  
Dislocation Arrays ◽  
Before And After

ABSTRACTAluminium-silicon alloying is applied to dislocation-containing FZ silicon samples in order to verify if this external gettering technique is able to remove impurities trapped by these defects. Samples were scratched (front surface), bent and annealed at 750°C for 6h in order to create dislocation arrays. Standard samples and also nickel contaminated samples were investigated by light beam induced current (LBIC) mapping technique before and after alloying at 900°C for 4h with a 1 μm thick aluminium layer deposited on the backside. The LBIC technique detects the features of the dislocation array in agreement with X ray topographs. In the standard samples, the contrast is relatedto an inadvertent contamination of the samples and disappears after gettering. In the contaminated samples, dislocation contrast is higher, the aluminium treatment attenuates strongly the dislocations electrical activity but not so neatly as for the standard samples. This result is explained by the possible microprecipitation of nickel at dislocations.

scholarly journals Determination of oxygen permeability and mechanical properties of the aluminium paper foils

2014 ◽  
Vol 60 (No. 4) ◽  
pp. 172-179 ◽  
Author(s):  
Ľ. Kubík ◽  
S. Zeman
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Food Packaging ◽  
Oxygen Permeability ◽  
Pure Oxygen ◽  
Aluminium Layer ◽  
Tensile Forces ◽  
Moduli Of Elasticity

The paper deals with the determination of the oxygen permeability and mechanical properties of butter and curd aluminium paper foils Radaflex applied in the food packaging. Foil Radaflex is a paper foil covered by the aluminium layer. The measurement of the oxygen permeability was realized according to the Standard STN EN 77 0333. The measurement of mechanical properties was realized according to the Standard STN EN ISO 1924-2. Determination of moduli of elasticity in the longitudinal and transversal direction were provided and tensile properties as maximal elongations, maximal tensile forces, tensile strengths, tensile indexes and strain at breaks of the longitudinal and transversal specimens were evaluated. The permeability of pure oxygen through aluminium paper foils was studied. Aluminium paper foil was not permeable for the oxygen.

Metallic Layer Reflectance Analysis Using Design of Experiment

2014 ◽  
Vol 893 ◽  
pp. 461-464
Author(s):  
Zaliman Sauli ◽  
Vithyacharan Retnasamy ◽  
Ong Tee Say ◽  
Kok Soo Yih
Keyword(s):  
Grain Size ◽  
Design Of Experiment ◽  
Test Specimen ◽  
Gas Flow ◽  
Influence Factor ◽  
Reactive Ion Etching ◽  
Surface Reflectance ◽  
Ion Etching ◽  
Aluminium Layer ◽  
Reflectance Analysis

In this work, a Full Factorial Experimentation technique, Design of Experiment (DOE) was developed and used to control the parameter of RIE (Reactive Ion Etching) process on a silicon wafer with aluminium layer. The objective of this work is to examine the Reactive Ion Etching (RIE) process on aluminium with different parameter, which are temperature, vacuum, RF (Radio Frequency) power and gas flow. Then, AFM (Atomic Force Microscope) and Lambda 950 spectrometer are used to analyse the grain size and light reflectance on the test specimen after RIE process. From the result, all four parameters of RIE were give an effect on grain size and surface reflectance on the test specimen. The parameter of gas flow is the most influence factor for grain size and surface reflectance in RIE process for aluminium layer compared to other parameters in this work.

Aluminium-induced crystallisation of amorphous silicon: influence of the aluminium layer on the process

2004 ◽  
Vol 451-452 ◽  
pp. 481-484 ◽  
Author(s):  
J. Klein ◽  
J. Schneider ◽  
M. Muske ◽  
S. Gall ◽  
W. Fuhs
Keyword(s):  
Amorphous Silicon ◽  
Aluminium Layer

Multiple pulse heating cycles during the enclosed laser ablation of a laminated metallized polymer

2002 ◽  
Vol 216 (10) ◽  
pp. 1373-1384 ◽  
Author(s):  
R Stewart ◽  
L Li ◽  
R Isherwood
Keyword(s):  
Laser Ablation ◽  
Pulse Heating ◽  
Yttrium Aluminium Garnet ◽  
Aluminium Layer ◽  
Multiple Pulse ◽  
Yttrium Aluminium ◽  
Yttrium Aluminium Garnet Laser ◽  
Metallized Polymer

A vacuum-deposited aluminium layer (about 20nm) is sandwiched between two layers of laminated oriented polyporpylene (OPP) film whose thickness varies from 20 to 40 μm. Selected areas of this sealed system were transparentised by the rearrangement of the aluminium layer without breaking the seal or causing damage to the OPP film using a 75 W Q-swiched neodymumdoped yttrium aluminium garnet laser. This paper investigates the effecst of the laser repetition with changes in experimentally produced laser tracks.

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