The Influence of Anionic Species (Cl−, NO 3 − , SO 4 2− ) on the Transformation and Solubility of Platinum in Platinum/Aluminum Oxide Model Substance

2014 ◽  
pp. 277-288 ◽  
Author(s):  
Fathi Zereini ◽  
Ilka Müller ◽  
Clare L. S. Wiseman
Keyword(s):  
Aluminum Oxide ◽  
Model Substance ◽  
Anionic Species

Multiple phase transitions investigated by high-speed TEM

1990 ◽  
Vol 48 (4) ◽  
pp. 550-551
Author(s):  
Oleg Bostanjoglo ◽  
Peter Thomsen-Schmidt
Keyword(s):  
Phase Transitions ◽  
High Speed ◽  
Short Exposure ◽  
Semiconductor Film ◽  
Time Resolved ◽  
Short Exposure Time ◽  
Multiple Phase ◽  
Model Substance ◽  
History Of ◽  
Electron Image

Thin GexTe1-x (x = 0.15-0.8) were studied as a model substance of a composite semiconductor film, in addition being of interest for optical storage material. Two complementary modes of time-resolved TEM were used to trace the phase transitions, induced by an attached Q-switched (50 ns FWHM) and frequency doubled (532 nm) Nd:YAG laser. The laser radiation was focused onto the specimen within the TEM to a 20 μm spot (FWHM). Discrete intermediate states were visualized by short-exposure time doubleframe imaging /1,2/. The full history of a transformation was gained by tracking the electron image intensity with photomultiplier and storage oscilloscopes (space/time resolution 100 nm/3 ns) /3/. In order to avoid radiation damage by the probing electron beam to detector and specimen, the beam is pulsed in this continuous mode of time-resolved TEM,too.Short events ( <2 μs) are followed by illuminating with an extended single electron pulse (fig. 1c)

EFFECT OF DEPOSITION TEMPERATURE ON PLASMA GROWN ALUMINUM OXIDE FILMS

1988 ◽  
Vol 49 (C4) ◽  
pp. C4-409-C4-412 ◽  
Author(s):  
C. BOURREAU ◽  
Y. CATHERINE
Keyword(s):  
Aluminum Oxide ◽  
Deposition Temperature ◽  
Oxide Films

ON THE STRUCTURE AND PROPERTIES OF NANOFILMS DEPOSITED ON POROUS ALUMINUM OXIDE SUBSTRATES

2017 ◽  
Vol 8 (3) ◽  
pp. 167-192 ◽  
Author(s):  
A. V. Vakhrushev ◽  
A. Yu. Fedotov ◽  
A. V. Severyukhin ◽  
R. G. Valeev
Keyword(s):  
Aluminum Oxide ◽  
Structure And Properties ◽  
Porous Aluminum ◽  
Oxide Substrates ◽  
Porous Aluminum Oxide

The Appearance of Pitting on Thermally Grown Aluminum Oxide caused by Surface Segregation of Fe Impurities from the Bulk

2016 ◽  
Vol 53 (11) ◽  
pp. 681-695
Author(s):  
D. E. Diaz-Droguett ◽  
P. Núñez ◽  
A. L. Cabrera
Keyword(s):  
Aluminum Oxide ◽  
Surface Segregation ◽  
Fe Impurities ◽  
Thermally Grown

Structure and properties of gas-dynamic coatings and evaluation of their use in sliding friction pairs

2020 ◽  
pp. 260-266
Author(s):  
V.E. Arkhipov ◽  
T.I. Murav’eva ◽  
M.S. Pugachev ◽  
O.O. Shcherbakova
Keyword(s):  
Aluminum Oxide ◽  
Sliding Friction ◽  
Metal Layer ◽  
Structural Phase ◽  
Mechanical Mixture ◽  
Structural Factors ◽  
Coating Structure ◽  
Corundum Structure ◽  
Deposited Metal ◽  
Copper Zinc

The problems of changes in the coating structure depending on the composition of the sprayed mechanical mixture using copper particles and mixture of copper and zinc particles (" brass") and the effect of structural factors on the tribological properties of the deposited metal layer are considered. The results of X-ray structural, phase, chemical and durometric analyzes, as well as tribological testing of coatings are presented. It is found that structure with hardness of ≈102.7 HV is formed in the coating from mechanical mixture of particles of copper and aluminum oxide (corundum). Numerous pores are observed in the structure of the deposited metal layer, the main size of which does not exceed 2 μm. In the coating from mechanical mixture of particles copper, zinc and aluminum oxide (corundum), structure is formed based on copper with hardness of ≈106.5 HV, zinc — ≈49.7 HV, intermetallic compounds (γ- and ε-phases) — ≈168.7 HV, the mass fraction of which is 62.0, 7.9 and 24.2 %, respectively. Both coatings can be used in sliding friction pairs.

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