scholarly journals Investigation of the Powder Aerosol Deposition Method Using Shadowgraph Imaging

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2502
Author(s):  
Philipp Glosse ◽  
Stefan Denneler ◽  
Oliver Stier ◽  
Ralf Moos
Keyword(s):  
Gas Flow ◽  
Room Temperature ◽  
Imaging System ◽  
Spray Coating ◽  
Aerosol Deposition ◽  
Gas Jet ◽  
Deposition Method ◽  
Jet Formation ◽  
Aerosol Deposition Method ◽  
Powder Aerosol

The powder aerosol deposition method (PAD) is a vacuum-based spray coating technology. It allows for production of highly dense coatings at room temperature, especially of brittle-breaking materials. This yields new options for coating substrate materials that even melt at low temperatures. The film formation mechanism is called room temperature impact consolidation (RTIC). The occurrence of this mechanism is strongly linked to the gas jet used in the process. The velocity and direction of the particles in the gas jet forming between the nozzle orifice and the substrate are the main factors influencing the quality of the coating. This dependency aimed to be elaborated with a measurement setup and coating experiments and is shown in this work. We investigated the gas jet formation using a shadow optical imaging system. Regions of different gas density are visualized by this technique. Several parameter sets, in particular gas flow rates and chamber pressures, were investigated. In addition, coatings were produced on glass substrates with the same parameters. As a coating material, the superconducting ceramic-like magnesium diboride (MgB2) was chosen. A correlation between shadow images and thickness profiles of the coatings shows how the gas jet formation affects the uniformity of thickness. Shadow optical images provide valuable information on the flight direction of the particles and allow validation of simulation results.

Aerosol Deposition Method for Fabrication of Nano Crystal Ceramic Layer

2004 ◽  
Vol 449-452 ◽  
pp. 43-48 ◽  
Author(s):  
Jun Akedo
Keyword(s):  
Gas Flow ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Deposition Method ◽  
Polycrystalline Structure ◽  
Mechanical And Electrical Properties ◽  
Aerosol Deposition Method ◽  
Shock Consolidation ◽  
Nano Crystal ◽  
Fine Ceramics

Aerosol deposition method (ADM) for shock-consolidation of fine ceramics powder to form dense and hard layers is reported. Submicron ceramic particles were accelerated by gas flow in the nozzle up to velocity of several hundred m/s. During interaction with substrate, these particles formed thick (10 ~ 100 µm), dense, uniform and hard ceramics layers. Depositions were fulfilled at room temperature. Every layer has polycrystalline structure with nano-meter order scale.􀀂 The results of fabrications, microstructure, mechanical and electrical properties of oxides (α-Al2O3; Pb(Zr0.52,Ti0.48)O3 etc.) and non-oxides materials are presented.

How to Make Ceramic Gas Sensor Films at Room Temperature - the Powder Aerosol Deposition Method

2021 ◽  
Vol MA2021-01 (56) ◽  
pp. 1521-1521
Author(s):  
Ralf Moos ◽  
Murat Bektas ◽  
Gunter Hagen ◽  
Jaroslaw Kita ◽  
Daniela Schoenauer-Kamin ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Deposition Method ◽  
Aerosol Deposition Method ◽  
Powder Aerosol ◽  
Ceramic Gas Sensor

Aerosol Deposition Method (ADM) for Nano-Crystal Ceramics Coating Without Firing

2003 ◽  
Vol 779 ◽  
Author(s):  
Jun Akedo ◽  
Maxim Lebedev ◽  
Atsushi Iwata ◽  
Hisato Ogiso ◽  
Shizuka Nakano
Keyword(s):  
Mechanical Properties ◽  
Gas Flow ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Deposition Method ◽  
Polycrystalline Structure ◽  
Aerosol Deposition Method ◽  
Shock Consolidation ◽  
Nano Crystal ◽  
Fine Ceramics

AbstractAerosol deposition method (ADM) for shock-consolidation of fine ceramics powder to form dense and hard layers is reported. Submicron ceramic particles were accelerated by gas flow in the nozzle up to velocity of several hundred m/s. During interaction with substrate, these particles formed thick (10 ∼ 100 μm), dense, uniform and hard ceramics layers. Experiments were fulfilled at room temperature. The results of fabrications, microstructure and mechanical properties of oxides (Al2O3; (Ni,Zn)Fe2O3; Pb(Zr0.52,Ti0.48)O3 and non-oxide (AlN; MgB2) materials are presented. Every layer has polycrystalline structure with nano-meter order scale.

The Powder Aerosol Deposition Method - Making Ceramic Gas Sensor Films at Room Temperature

2020 ◽  
Vol MA2020-01 (30) ◽  
pp. 2263-2263
Author(s):  
Ralf Moos ◽  
Murat Bektas ◽  
Gunter Hagen ◽  
Jaroslaw Kita ◽  
Daniela Schönauer-Kamin ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Deposition Method ◽  
Aerosol Deposition Method ◽  
Powder Aerosol ◽  
Ceramic Gas Sensor

Aerosol Deposition Method (Adm) For Nano-Crystal Ceramics Coating Without Firing

2003 ◽  
Vol 778 ◽  
Author(s):  
Jun Akedo ◽  
Maxim Lebedev ◽  
Atsushi Iwata ◽  
Hisato Ogiso ◽  
Shizuka Nakano
Keyword(s):  
Mechanical Properties ◽  
Gas Flow ◽  
Room Temperature ◽  
Aerosol Deposition ◽  
Deposition Method ◽  
Polycrystalline Structure ◽  
Aerosol Deposition Method ◽  
Shock Consolidation ◽  
Nano Crystal ◽  
Fine Ceramics

AbstractAerosol deposition method (ADM) for shock-consolidation of fine ceramics powder to form dense and hard layers is reported. Submicron ceramic particles were accelerated by gas flow in the nozzle up to velocity of several hundred m/s. During interaction with substrate, these particles formed thick (10 ∼ 100 μm), dense, uniform and hard ceramics layers. Experiments were fulfilled at room temperature. The results of fabrications, microstructure and mechanical properties of oxides (Al2O3; (Ni,Zn)Fe2O3; Pb(Zr0.52,Ti0.48)O3 and non-oxide (AlN; MgB2) materials are presented. Every layer has polycrystalline structure with nano-meter order scale.

scholarly journals Powder aerosol deposition method — novel applications in the field of sensing and energy technology

2019 ◽  
Vol 12 (05) ◽  
pp. 1930005 ◽  
Author(s):  
Michaela Schubert ◽  
Dominik Hanft ◽  
Tobias Nazarenus ◽  
Jörg Exner ◽  
Michael Schubert ◽  
...  
Keyword(s):  
Ceramic Powder ◽  
Spray Coating ◽  
Aerosol Deposition ◽  
Ceramic Coatings ◽  
Energy Technology ◽  
Vibration Energy Harvesting ◽  
Promising Alternative ◽  
Aerosol Deposition Method ◽  
Powder Aerosol ◽  
Functional Ceramics

The Aerosol Deposition (AD) method is a dry spray coating process for the production of dense ceramic coatings at room temperature directly from the ceramic raw powder. In order to avoid confusion with liquid aerosol technology, the term powder aerosol deposition (PAD) is introduced here, to highlight that the aerosol consists only of ceramic powder and carrier gas. Especially in the field of functional ceramics, PAD is a promising alternative to conventional sinter-based production processes. This review focuses on the PAD of functional ceramics in the field of sensing and energy technology. In this context, especially current developments and trends are presented. On the part of the sensors, gas and temperature sensors are especially considered, whereas in the field of energy technology, the focus is on vibration energy harvesting, thermoelectric generators, superconductors, and solar cells as well as on all solid-state batteries and fuel cells. Besides the different applications of PAD films, this review also highlights opportunities for influencing the film properties by the used powder or the process parameters.

Dielectric Properties of Nanograined BaTiO3 Ceramics Fabricated by Aerosol Deposition Method

2011 ◽  
Vol 485 ◽  
pp. 183-186 ◽  
Author(s):  
Tsutomu Furuta ◽  
Saki Hatta ◽  
Yoichi Kigoshi ◽  
Takuya Hoshina ◽  
Hiroaki Takeda ◽  
...  
Keyword(s):  
Grain Size ◽  
Room Temperature ◽  
Annealing Treatment ◽  
Aerosol Deposition ◽  
Dielectric Measurement ◽  
Deposition Method ◽  
Grain Sizes ◽  
Average Grain Size ◽  
Aerosol Deposition Method ◽  
Polarization Electric Field

Freestanding BaTiO3 ceramics films were fabricated using the aerosol deposition (AD) method and the size effect of nanograined BaTiO3 ceramics was demonstrated. Dense BaTiO3 thick film fabricated by the AD method was crystallized and detached from substrate by an annealing treatment at 600 °C, and then the grain size was controlled by a reannealing treatment at various temperatures. As a result, freestanding BaTiO3 thick films with various grain sizes from 24 to 170 nm were successfully obtained. Polarization–electric field (P–E) measurement revealed that BaTiO3 ceramics with grain sizes of more than 58 nm showed ferroelectricity, whereas BaTiO3 ceramics with an average grain size of 24 nm showed paraelectricity at room temperature. Dielectric measurement indicated that the permittivity decreased with decreasing grain size in the range of 170 to 24 nm.

Sign in / Sign up

Export Citation Format

Share Document