scholarly journals Optical emission generated by particle impact during aerosol deposition of alumina films

2021 ◽  
pp. 1-9
Author(s):  
Yasuhito Matsubayashi ◽  
Tsuyohito Ito ◽  
Kentaro Shinoda ◽  
Kazuo Terashima ◽  
Jun Akedo
Keyword(s):  
Optical Emission ◽  
Aerosol Deposition ◽  
Particle Impact ◽  
Alumina Films

scholarly journals A Self-Consistent Scheme for Understanding Particle Impact and Adhesion in the Aerosol Deposition Process

2021 ◽  
Vol 30 (3) ◽  
pp. 523-541
Author(s):  
Robert Saunders ◽  
Scooter D. Johnson ◽  
Douglas Schwer ◽  
Eric A. Patterson ◽  
Heonjune Ryou ◽  
...  
Keyword(s):  
Process Parameters ◽  
Aerosol Deposition ◽  
Deposition Process ◽  
Deposition Efficiency ◽  
Film Deposition ◽  
Particle Impact ◽  
Fe Modeling ◽  
Sem Images ◽  
Self Consistent ◽  
Particle Parameters

AbstractAerosol deposition (AD) is a thick-film deposition process that can produce films tens to hundreds of micrometers thick with densities greater than 95% of the bulk at room temperature. However, the precise mechanisms of bonding and densification are still under debate. To better understand and predict deposition, a self-consistent approach is employed that combines computational fluid dynamics (CFD), finite element (FE) modeling, and experimental observation of particle impact to improve the understanding of particle flight, impact, and adhesion in the AD process. First, deposition is performed with a trial material to form a film. The process parameters are fed into a CFD model that refines the particle flow and impact velocity for a range of sizes. These values are in turn used to inform the FE parameters to model the fracture and adhesion of the particle on the substrate. The results of FE modeling are compared to SEM images of fractured particles to complete a self-consistent numerical and experimental understanding of the AD process. Additional FE and CFD simulations are used to study how process parameters, materials, and particle parameters affect the deposition process and how the developed tools can be used to optimize deposition efficiency.

Robust Mechanical Properties of Electrically Insulative Alumina Films by Supersonic Aerosol Deposition

2015 ◽  
Vol 24 (6) ◽  
pp. 1046-1051 ◽  
Author(s):  
Jong-Gun Lee ◽  
You-Hong Cha ◽  
Do-Yeon Kim ◽  
Jong-Hyuk Lee ◽  
Tae-Kyu Lee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aerosol Deposition ◽  
Alumina Films

Powder requirements for aerosol deposition of alumina films

2015 ◽  
Vol 26 (4) ◽  
pp. 1143-1151 ◽  
Author(s):  
Jörg Exner ◽  
Manuel Hahn ◽  
Michael Schubert ◽  
Dominik Hanft ◽  
Paul Fuierer ◽  
...  
Keyword(s):  
Aerosol Deposition ◽  
Alumina Films

Influence of high temperature annealing on the dielectric properties of alumina films prepared by the aerosol deposition method

2018 ◽  
Vol 11 (02) ◽  
pp. 1850022 ◽  
Author(s):  
Nico Leupold ◽  
Michael Schubert ◽  
Jaroslaw Kita ◽  
Ralf Moos
Keyword(s):  
Dielectric Properties ◽  
Loss Tangent ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Deposition Method ◽  
Low Frequencies ◽  
Alumina Films ◽  
Ceramic Films ◽  
Aerosol Deposition Method ◽  
Temperature Impact

The aerosol deposition method (ADM) is a novel coating technique that allows to fabricate dense and nanocrystalline ceramic films at room temperature. To investigate the dielectric properties of aerosol deposited alumina films at high temperatures and the influence of annealing on them, the temperature was increased in steps of 100[Formula: see text]C from 200[Formula: see text]C to 900[Formula: see text]C and subsequently cooled down stepwise again. At each step, the dielectric properties were measured by impedance spectroscopy between 50[Formula: see text]mHz and 200[Formula: see text]kHz. During the heating steps, the relative permittivity and also the loss tangent showed a disordered behavior with various maxima in the loss tangent. After reaching 900[Formula: see text]C, during cooling, the behavior was more ordered, and the loss tangent exhibited only one maximum that appeared at lower frequencies. Overall, the annealing reduces the loss tangent at low frequencies and low temperatures. The origin of this behavior could lie in the annealing of defects, which are incorporated into the layer when the particles hit the surface of the substrate and crack while being deposited via ADM following the room temperature impact consolidation mechanism (RTIC).

Characterization of ultraintense laser produced fast electron propagation in insulatorsvs.conductors by optical emission diagnostics

2006 ◽  
Vol 133 ◽  
pp. 499-502 ◽  
Author(s):  
M. Manclossi ◽  
J. J. Santos ◽  
J. Faure ◽  
A. Guenmie-Tafo ◽  
D. Batani ◽  
...  
Keyword(s):  
Fast Electron ◽  
Optical Emission ◽  
Electron Propagation

A MAS NMR STUDY OF THE STRUCTURE OF AMORPHOUS ALUMINA FILMS

1985 ◽  
Vol 46 (C8) ◽  
pp. C8-113-C8-117 ◽  
Author(s):  
R. Dupree ◽  
I. Farnan ◽  
A. J. Forty ◽  
S. El-Mashri ◽  
L. Bottyan
Keyword(s):  
Mas Nmr ◽  
Alumina Films ◽  
Nmr Study ◽  
Amorphous Alumina
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