Evaluation of the Influence of Alumina Nano-Particle Size and Weight Composition on the Corrosion Resistance of Monolithc Aa1070 Aluminium

2021 ◽  
Author(s):  
Roland Loto ◽  
Phillip Babalola
Keyword(s):  
Particle Size ◽  
Corrosion Resistance ◽  
Nano Particle ◽  
Weight Composition

EFFECT OF NANO PARTICLE SIZES ON HIGH PRESSURE RAMAN SCATTERING IN NANOCRYSTALLINE CERIUM DIOXIDE

2011 ◽  
Vol 25 (31) ◽  
pp. 2399-2405 ◽  
Author(s):  
P. JIMLIM ◽  
T. BOVORNRATANARAKS ◽  
W. CHAIMAYO ◽  
S. PRATONTEP
Keyword(s):  
Particle Size ◽  
High Pressure ◽  
Oxygen Vacancies ◽  
Molar Fraction ◽  
Raman Frequency ◽  
Particle Sizes ◽  
Nano Particle ◽  
First Order ◽  
Nanocrystalline Cerium Dioxide ◽  
Diamond Anvil

Nanocrystalline CeO 2 with different particle sizes has been studied under high pressure using Raman spectroscopy techniques and diamond anvil cell at room temperature. The pressure shift of the first-order Raman frequency for each particle sizes was measured. Linear dependence of the first order Raman frequency on pressure for each particle sizes has been observed. We found that the first order Raman frequency decreases with the decreasing particle sizes under ambient condition and the lattice constant increases with the decreasing particle size. The increasing molar fraction of oxygen vacancies with the decreasing particle size is responsible for the lattice expansion.

Effect of particle size on the surface activity of TiC–Ni composite coating via the interfacial valence electron localization

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 18793-18799 ◽  
Author(s):  
Zirun Yang ◽  
Hao Lu ◽  
Ziran Liu ◽  
Xianguo Yan ◽  
Dongyang Li
Keyword(s):  
Particle Size ◽  
Composite Coating ◽  
Surface Activity ◽  
Valence Electron ◽  
Electron Localization ◽  
Nano Particle ◽  
Tic Particle ◽  
Effect Of Particle Size ◽  
Work Functions

Electron work functions and open potentials of electrodeposited Ni, TiC micro- and nano-particle-reinforced Ni matrix coatings were studied to investigate the effects of TiC particle size on the surface activity and corrosion tendency of the coatings.

Influence of WC Particle Size and Matrix Composition on the Behavior of WC-Co-Cr Coatings Sprayed by the HVOF Process

1997 ◽  
Author(s):  
J. Berget ◽  
E. Bardal ◽  
T. Rogne
Keyword(s):  
Particle Size ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Chromium Content ◽  
Deposition Efficiency ◽  
Matrix Composition ◽  
Coating Properties ◽  
Hvof Process ◽  
Erosion Corrosion ◽  
The Matrix

Abstract WC-Co-Cr powders with different WC particle size have been sprayed by the HVOF process. At constant spraying conditions the powders give coatings of different quality. The deposition efficiency during spraying of powders containing large WC particles was found to be low compared to powders with finer WC grains. In addition the amounts of porosity and cracks were different. The coatings have been characterised by different methods. Erosion and erosion-corrosion tests showed that the WC particle size also influence the wear resistance of the coatings. Small WC particle size was found to be beneficial. Chemical composition of the matrix was also found to be decisive for the coating properties. An increase of the chromium content improved the erosion-corrosion resistance.

scholarly journals Pyrene-based aggregation-induced emission luminogens (AIEgen): structure correlated with particle size distribution and mechanochromism

2019 ◽  
Vol 7 (23) ◽  
pp. 6932-6940 ◽  
Author(s):  
Xing Feng ◽  
Jun Zhang ◽  
Zhen Hu ◽  
Qingsong Wang ◽  
Md. Monarul Islam ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Significant Role ◽  
Emission Intensity ◽  
Morphological Changes ◽  
Nano Particle ◽  
Aggregation Induced Emission ◽  
Water Fraction ◽  
Particle Species

The morphology of pyrene-based AIEgens changes depending on the water fraction. The different size distribution and morphological changes of nano-particle species play a significant role in enhancing the emission intensity in the aggregated state.

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