Flame Spray Deposition of Composite Titanium Alloy and Bioactive Glass Coatings

Nelson, Greg; McDonald, André; Nychka, John A.

doi:10.1002/9781118062111.ch18

Cited by 2 publications

(2 citation statements)

References 22 publications

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“…The film formation from FSP has been studied recently by Pratsinis et al leading to a fundamental understanding of the underlying mechanisms . Nevertheless, in most publications on FSP-based layer deposition, the deposition is carried out in a distinct region above the top of the flame front, where particle formation is already completed. − This leads to highly porous films with high surface areas and porosities, which can be very effectively used in applications such as gas sensors or catalysts . However, for active layers in TFTs dense films are required.…”

Section: Introductionmentioning

confidence: 99%

Pulsed Direct Flame Deposition and Thermal Annealing of Transparent Amorphous Indium Zinc Oxide Films As Active Layers in Field Effect Transistors

Kilian

Polster

Vogeler

et al. 2014

ACS Appl. Mater. Interfaces

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Indium–zinc oxide (IZO) films were deposited via flame spray pyrolysis (FSP) by pulsewise shooting a Si/SiO2 substrate directly into the combustion area of the flame. Based on UV–vis measurements of thin-films deposited on glass substrates, the optimal deposition parameters with respect to low haze values and film thicknesses of around 100 nm were determined. Thermal annealing of the deposited films at temperatures between 300 and 700 °C was carried out and staggered bottom gate thin-film transistors (TFT) were fabricated. The thin films were investigated by scanning electron microscopy, atomic force microscopy, X-ray diffraction, Fourier transformed infrared spectroscopy, and room-temperature photoluminescence measurements. The outcome of these investigations lead to two major requirements in order to implement a working TFT: (i) organic residues from the deposition process need to be removed and (ii) the net free charge carrier concentration has to be minimized by controlling the trap states in the semiconductor. The optimal annealing temperature was 300 °C as both requirements are fulfilled best in this case. This leads to field effect transistors with a low hysteresis, a saturation mobility of μSat = 0.1 cm2/(V s), a threshold voltage of V th = −18.9 V, and an I on/I off ratio on the order of 107. Depending on thermal treatment, the defect density changes significantly strongly influencing the transfer characteristics of the device.

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Section: Introductionmentioning

confidence: 99%

Pulsed Direct Flame Deposition and Thermal Annealing of Transparent Amorphous Indium Zinc Oxide Films As Active Layers in Field Effect Transistors

Kilian

Polster

Vogeler

et al. 2014

ACS Appl. Mater. Interfaces

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“…powders, ribbons and wires, as consequence of the limitations from the processes available currently, even though bulk metallic glass can be obtained for certain alloys 4 . Thermal spraying techniques have gained much attention to produce coatings of metallic glasses in metallic substrate to improve wear and corrosion resistances [5][6][7][8][9] . The use of glassy metals as coatings enhanced the service life of parts and equipments, such as pipes and other steel-made components from oil and gas industry 5 .…”

Section: Introductionmentioning

confidence: 99%

Thermal Spraying Processes and Amorphous Alloys: Macro-Indicators of Patent Activity

et al. 2017

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Thermal spraying processes allows high cooling rates and can favor the formation of amorphous microstructures. Amorphous metallic coatings can result in superior mechanical and functional properties. To follow new technological development and innovation paths, indicators based on patent data can be assembled to support technological forecasting assessments and decision making. This study mapped the technological development on amorphous alloys processed by thermal spraying using patent indicators from documents indexed in the Derwent Innovations Index database between the years 1997 and 2014. We evaluate the patent activity, the role of countries, the main technological subdomains and markets of interest, as well as the main metallic alloys explored as coating. We conclude that new technological developments should be expected in near future and these advances both in amorphous alloys and thermal spraying shall be constantly monitored in the coming years.

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Flame Spray Deposition of Composite Titanium Alloy and Bioactive Glass Coatings

Cited by 2 publications

References 22 publications

Pulsed Direct Flame Deposition and Thermal Annealing of Transparent Amorphous Indium Zinc Oxide Films As Active Layers in Field Effect Transistors

Pulsed Direct Flame Deposition and Thermal Annealing of Transparent Amorphous Indium Zinc Oxide Films As Active Layers in Field Effect Transistors

Thermal Spraying Processes and Amorphous Alloys: Macro-Indicators of Patent Activity

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