Cold-Sprayed Ni-Al2O3 Coatings for Applications in Power Generation Industry

Sevillano, F.; Poza, P.; Múnez, C.J.; Vezzù, Simone; Rech, Silvano; Trentin, Andréa Gonçalves

doi:10.1007/s11666-013-9890-2

Cited by 48 publications

(24 citation statements)

References 30 publications

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“…Furthermore, Li et al 161 and Xiao et al 202 found that the wear mechanism of coatings depends on ambient temperature. Sevillano et al 201 found that the CS Ni-Al2O3 coating exhibits good oxidation resistance even at 520°C, and Heimann et al 217 reported a similar finding for Al-Al2O3 composite.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 84%

“…However, it is difficult to fabricate high-performance PRMMC by conventional means, especially those with high volume fraction of ceramics. CS showed great potential in producing MMC coatings with metal matrices, such as Al and its alloys, 76,88,894,95,119,120,127,129,131,138,179,180,200 Ni and its alloys 91,75,[160][161][162]201 and Cu based composites, 153,167,202 155 Thermal spraying of WC-Co coatings will inevitably generate the brittle η phase and causedecarburization of WC, which severely affect their hardness and wear resistance. 20,204 A simple comparasion on the WC-Co coatings deposited by both CS and TS is made (Table 2), which is based on the work by Couto et al 22,157 205,206-209 The WC-xCo coatings fabricated by CS maintained the original phases of the particles, while the counterparts by high velocity oxy-fuel spraying (HVOF) or high velocity air-fuel spraying (HVAF) experienced decarbonization and formed hard brittle W2C, Co6W6C and Co3W3C phases, which cause the coatings to possess a higher hardness but lower toughness.…”

Section: General Aspectsmentioning

confidence: 99%

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A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Assadi

Gaertner

et al. 2018

Critical Reviews in Solid State and Materials Sciences

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Cold spraying (CS) has been widely explored over the last decade due to its low process temperature and limited thermal effect on spray materials. As a solid-state process, the inherent deficiencies of traditional thermal spraying such as oxidation, decomposition and grain growth are avoided. This article summarizes the research work on the fabrication of composites and nanostructured coatings by the promising CS process. After a brief introduction to CS and its deposition mechanisms, the preparation methods of spray powders are classified. Different methods are appropriate for particles of various properties, and the tendency is to design composite powders by combined methods in order to create coatings with specified properties. Then the co-deposition mechanism of composite particles as well as research findings on metal-metal, metal-ceramic and metal-intermetallic composite coatings are reviewed concerning the deposition characteristics, microstructure and its relation to properties. Moreover, CS has been used to deposit a variety of nanostructured materials, including metals, metal-ceramic composites, and even ceramics, retaining their nanocrystalline nature in the coating without grain growth or phase transformation. Finally, the potential applications of CS and issues to be addressed in coating deposition are discussed.

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Section: Microstructure and Mechanical Propertiesmentioning

confidence: 84%

Section: General Aspectsmentioning

confidence: 99%

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Assadi

Gaertner

et al. 2018

Critical Reviews in Solid State and Materials Sciences

View full text Add to dashboard Cite

show abstract

“…2.14c, d represent the SEM images after cold spraying these feedstock of alumina-nickel blend, which reveals the change in the growth behavior of coating due to the difference in Al content. It is also been reported by this group that 50 wt% alumina feedstock has shown a very low porosity of 3 %; due to this negligible porosity, the hardness of pure Ni was increased from 175 to 338 H v for Ni-Al 2 O 3 composite, therefore promoting greater works hardness [83]. Hence, such cermet coating was used for the reduction of wear debris between the rotating and stationary components in gas path, thereby increasing the efficiency of gas turbine.…”

Section: Coatings For Fossil Fuels-based Energymentioning

confidence: 89%

“…Apart from ceramic-based TBCs, cermet coatings are also used in energy applications mainly because of their high wear resistance and oxidation-resistant functionality. Cermet coatings of Ni-Al 2 O 3 were cold sprayed by Sevillano et al as wear-resistant sealants in power plant turbines [83]. They reported that depending upon the composition, fragmentation of alumina occurs during cold spraying, which leads to homogeneous dispersion of ceramic in metal matrix.…”

Section: Coatings For Fossil Fuels-based Energymentioning

confidence: 99%

Coatings for Energy Applications

Keshri

Sribalaji

2015

Thin Film Structures in Energy Applications

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This chapter aims at providing an understanding about the potential applications of various types of coatings in energy sector. As the energy demands are growing day by day, there is need of enhancing the efficiency of energy systems, which can be enhanced using the advanced coatings. This chapter summarizes about the application of thin films and thick coatings of conventional/nanomaterials in both renewable and non-renewable energy sectors. A comparison between the efficiencies of systems with and without coatings has also been addressed. The importance and challenges associated with adding nanomaterials like carbon nanotubes (CNT), graphene, and various nanostructures with conventional coating material have also been discussed. This chapter can lead to better fundamental understanding about the coatings, which ensures new designs, high efficiency, and large application of coatings in energy sector. IntroductionEnergy has been the part of our life, especially electricity plays a vital role in our modern society. With an ever-increasing population, energy demand also growing faster for the past few decades. To meet the increased demand, every country has started to explore different energy systems to produce and store electricity in an efficient and most importantly in the eco-friendly way [1]. Hence, by increasing energy production, emission of greenhouse gases like carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) also rises to its peak. In order to decrease the emission of greenhouse gases, a worldwide initiation has also been in progress. Energy conservation steps have been introduced, either by reducing CO 2 emission from non-renewable sources like coal, natural gas, petroleum, and nuclear sources; or by avoiding such emissions using renewable energy sources as wind, water, sunlight, or biomass.

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“…Właściwe połączenie materiałów o tak różnych właściwościach pozwala otrzymać materiał charakteryzujący się cechami znacznie przewyższającymi te, które posiadają materiały wyjściowe. W zależności od użytych materiałów oraz zastosowanych metod konstytuowania możliwe jest uzyskanie powłok kompozytowych o podwyższonych właściwościach tribologicznych, optycznych, elektronicznych, magnetycznych, chemicznych [1,2]. Powłoki kompozytowe powstałe w wyniku Anna Góral, Wojciech Żórawski współosadzania się cząstek ceramicznych w metalowej osnowie znajdują zastosowanie ze względu na możliwość pracy w podwyższonych temperaturach i dobrą odporność na zużycie.…”

Section: Wstępunclassified

Charakterystyka mikrostruktury powłok Ni-Al2O3 natryskanych zimnym gazem

Góral¹,

Żórawski²

2015

Przegląd Spawalnictwa

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Natryskiwanie zimnym gazem jest najnowocześniejszą metodą natryskiwania cieplnego pozwalającą na uzyskanie właściwości powłok nieosiągalnych dotychczas konwencjonalnymi metodami natryskiwania cieplnego. W artykule przedstawiono proces natryskiwania zimnym gazem oraz możliwości natryskiwania powłok kompozytowych. Pokazano ponadto wyniki badań własnych mikrostruktury i analizy składu fazowego powłoki Ni-Al2O3 otrzymanej przez natrysk zimnym gazem.

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Cold-Sprayed Ni-Al2O3 Coatings for Applications in Power Generation Industry

Cited by 48 publications

References 30 publications

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Coatings for Energy Applications

Charakterystyka mikrostruktury powłok Ni-Al2O3 natryskanych zimnym gazem

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