Influence of Microstructure on Pass through Flux of High Purity Ni

2016 ◽  
Vol 848 ◽  
pp. 696-702 ◽  
Author(s):  
Guo Jin Xu ◽  
Jun Feng Luo ◽  
Yong Jun Li ◽  
Jin Jiang He ◽  
Xiao Yong Wan ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Grain Growth ◽  
High Purity ◽  
Ferromagnetic Materials ◽  
Experimental Results ◽  
Design Development ◽  
Essential Parameter ◽  
Pass Through ◽  
Magnetic Sputtering ◽  
Annealing Microstructure

Pass through flux (PTF) is an essential parameter for the magnetron sputtering process of ferromagnetic materials. In the present investigation the influence of deformation, recrystallized microstructure and thickness on PTF of Ni was examined by the analysis of microstructure and hardness of high purity Ni. The experimental results showed that PTF of rolled Ni increased significantly comparing to the annealing microstructure that is related to the dislocation and stress of microstructure. With the recrystallization and grain growth of deformed samples, PTF decreased to be about 30%. PTF was also associated with the thickness of material. It increased by 6% when the thickness of 0.5mm decreased. This research is useful to guide and improve the design, development and preparation of magnetic sputtering materials.

Synthesis of Nanocomposite thin film Ti/Al Multilayers and Ti-Aluminides

1996 ◽  
Vol 457 ◽  
Author(s):  
R. Banerjee ◽  
X. D. Zhang ◽  
S. A. Dregia ◽  
H. L. Fraser
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Layer Thickness ◽  
Thermodynamic Model ◽  
Interfacial Reactions ◽  
Experimental Results ◽  
Structural Transitions ◽  
Nanocomposite Thin Film ◽  
Multilayered Thin Films

ABSTRACTNanocomposite Ti/Al multilayered thin films have been deposited by magnetron sputtering. These multilayers exhibit interesting structural transitions on reducing the layer thickness of both Ti and Al. Ti transforms from its bulk stable hep structure to fee and Al transforms from fee to hep. The effect of ratio of Ti layer thickness to Al layer thickness on the structural transitions has been investigated for a constant bilayer periodicity of 10 nm by considering three different multilayers: 7.5 nm Ti / 2.5 nm Al, 5 nm Ti / 5 nm Al and 2.5 nm Ti / 7.5 nm Al. The experimental results have been qualitatively explained on the basis of a thermodynamic model. Preliminary experimental results of interfacial reactions in Ti/Al bilayers resulting in the formation of Ti-aluminides are also presented in the paper.

Enhancing CoCr(Pt)Ta target's pass-through flux for magnetron sputtering

1995 ◽  
Vol 31 (6) ◽  
pp. 2818-2820 ◽  
Author(s):  
M. Schlott ◽  
M. Weigert ◽  
B.L. Gehman
Keyword(s):  
Magnetron Sputtering ◽  
Pass Through

scholarly journals RoughDroid: Operative Scheme for Functional Android Malware Detection

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Khaled Riad ◽  
Lishan Ke
Keyword(s):  
False Positive Rate ◽  
Experimental Results ◽  
Android Application ◽  
Android Malware ◽  
Feature Sets ◽  
Android Malware Detection ◽  
Analysis Technique ◽  
Positive Rate ◽  
Pass Through ◽  
Google Play

There are thousands of malicious applications that invade Google Play Store every day and seem to be legal applications. These malicious applications have the ability to link the malware referred to as Dresscode created for network hacking as well as scrolling information. Since Android smartphones are indispensable, there should be an efficient and also unusual protection. Therefore, Android smartphones usually continue to be safeguarded from novel malware. In this paper, we propose RoughDroid, a floppy analysis technique that can discover Android malware applications directly on the smartphone. RoughDroid is based on seven feature sets (FS1,FS2,…,FS7) from the XML manifest file of an Android application, plus three feature sets (FS8,FS9, and FS10) from the Dex file. Those feature sets pass through the Rough Set algorithm to elastically classify the Android application as either benign or malicious. The experimental results mainly consider 20 most common malware families, plus three new malware families (Grabos, TrojanDropper.Agent.BKY, and AsiaHitGroup) that invade Google Play Store at 2017. According to the experimental results, RoughDroid has 95.6% detection performance for the malware families at 1% false-positive rate. Finally, RoughDroid is a lightweight approach for straightly examining downloaded applications on the smartphone.

Zum Kornwachstum beim reinen und dotierten polykristallinen Selen / Grain Growth of Pure and Doped Poly crystalline Selenium

1971 ◽  
Vol 26 (7) ◽  
pp. 1198-1201
Author(s):  
C. Weyrich
Keyword(s):  
Electrical Conductivity ◽  
Grain Size ◽  
Grain Growth ◽  
Annealing Time ◽  
High Purity ◽  
The Mean ◽  
Grain Surface ◽  
Polycrystalline Form ◽  
Grain Diameter

Abstract Grain Growth of Pure and Doped Poly crystalline Selenium Samples of vitreous high-purity selenium as well as vitreous chlorine-and thallium-doped selenium have been brought into the polycrystalline form by annealing. The dependence of grain size on annealing time tu was measured. In high-purity selenium and in chlorine-doped selenium the mean grain diameter increases essentially ~ tu1/2 , in thallium-doped selenium ~ tu1/2 , as is expected from the laws of grain growth. The proportionality between electrical conductivity and specific grain surface reported by other authors could not be verified.

NORMAL GRAIN GROWTH IN ZONE-REFINED HIGH-PURITY METALS

1959 ◽  
Vol 37 (4) ◽  
pp. 496-498 ◽  
Author(s):  
E. L. Holmes ◽  
W. C. Winegard
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
High Purity ◽  
Liquid State ◽  
Energy Barrier ◽  
Boundary Migration ◽  
Single Atom ◽  
Grain Boundary Migration

Comparisons are made between theoretical and experimental rates of boundary migration during grain growth in zone-refined metals; these indicate that a single-atom process is involved. A model is proposed for the mechanism of grain-boundary migration based on the assumption of a single-atom process and the fact that the energies of activation for grain growth, both in zone-refined lead and tin, are similar to the energy barrier to be overcome by an atom in transferring from the solid to the liquid state during melting.

The production of high performance YBa2Cu3O7 using nitrogen dioxide

1990 ◽  
Vol 5 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Kevin J. Leary ◽  
Howard W. Jacobson ◽  
Nancy F. Levoy ◽  
Richard A. Lapalomento ◽  
Thomas R. Askew ◽  
...  
Keyword(s):  
Nitrogen Dioxide ◽  
High Purity ◽  
High Performance ◽  
Room Temperature ◽  
Experimental Results ◽  
Energy Dispersive ◽  
Slow Cooling ◽  
X Ray

Energy Dispersive X-ray Spectroscopy (EDS) was used to show that the elemental homogeneity of YBa2Cu3O7 powders can be improved substantially by heating the powder in a nitrogen dioxide-containing atmosphere (e.g., 950°C), followed by annealing in oxygen at 950°C, and slow-cooling to room temperature. The improved homogeneity results in a substantially larger flux exclusion signal for the NO2-treated powder, as measured by both ac and dc techniques. The experimental results suggest a mechanism which involves the formation of a small amount of molten Ba(NO3)2, which acts as a flux that dissolves the constituents and reprecipitates them as high purity YBa2Cu3O7.

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