Progress in coatings for gas turbine airfoils

Goward, G.W.

doi:10.1016/s0257-8972(98)00667-7

Cited by 647 publications

(288 citation statements)

References 37 publications

Supporting

Mentioning

286

Contrasting

Unclassified

Order By: Relevance

“…Therefore, catastrophic failure of the components may occur due to this hot corrosion since the load-carrying ability of the material is reduced rapidly. Extensive studies have been conducted to investigate the phenomena of hot corrosion, especially in air-craft turbine engines 6,7,8 . Hot corrosion may be defined as accelerated attack of molten sodium salts and oxides mixture such as NaCl, Na2SO4 and V2O5 deposited from environment contaminants at high temperatures.…”

Section: Alloy Degradation At High Temperaturesmentioning

confidence: 99%

“…Furthermore, it has been reported 11 that increasing the aluminium content in nickel-based superalloys reduces the solubility of chromium in the matrix and therefore decreases the hot corrosion resistance of the material. Therefore, to provide superalloys with high strength and good oxidation and corrosion resistance, coatings based on the nickel aluminide -NiAl are applied on the surface of the materials 6 .…”

Section: Protection Of the Alloysmentioning

confidence: 99%

See 1 more Smart Citation

Alloys developed for high temperature applications

Basuki

Prajitno

Muhammad

2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Co-based alloys design based on first-principles calculations: Influence of transition metal and rare-earth alloying element on stacking fault energy AIP Conference Proceedings 1805, 060004 (2017) Abstract. Alloys used for high temperatures applications require combinations of mechanical strength, microstructural stability and corrosion/oxidation resistance. Nickel base superalloys have been traditionally the prime materials utilized for hot section components of aircraft turbine engines. Nevertheless, due to their limited melting temperatures, alloys based on intermetallic compounds, such as TiAl base alloys, have emerged as high temperature materials and intensively developed with the main aim to replace nickel based superalloys. For applications in steam power plants operated at lower temperatures, ferritic high temperature alloys still attract high attention, and therefore, development of these alloys is in progress. This paper highlights the important metallurgical parameters of high temperature alloys and describes few efforts in the development of Fe-Ni-Al based alloys containing B2-(Fe,Ni)Al precipitates, oxide dispersion strengthening (ODS) ferritic steels and titanium aluminide based alloys include important protection system of aluminide coatings.

show abstract

Section: Alloy Degradation At High Temperaturesmentioning

confidence: 99%

Section: Protection Of the Alloysmentioning

confidence: 99%

Alloys developed for high temperature applications

Basuki

Prajitno

Muhammad

2017

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…Table 1 lists the principal coating processes, the typical coating thicknesses attainable, common coating materials, and some applications [1][2][3][4][5][6]. Not all processes are suitable for all coating materials and not all coating thicknesses are attainable with all methods.…”

Section: State Of the Artmentioning

confidence: 99%

Ni-Al and NiO-Al Composite Coatings by Combustion-Assisted Flame Spraying

et al. 2014

View full text Add to dashboard Cite

Abstract:A new, cost-efficient and on-site-applicable thermal spraying process for depositing NiAl metallic overlay or bond-coat coatings for high temperature applications by synthesizing the desired intermetallic phases in-flight during oxy-acetylene flame spraying is presented. Base-metal powders were used for spraying and, by adjusting the spraying conditions, excellent NiAl-based coatings were achieved on various substrates, including mild steel, stainless steel and aluminium alloys. Expensive, pre-alloyed or agglomerated powders are avoided and the method is very promising for in-situ work and repairs. We call the new method "Combustion-Assisted Flame Spraying" (CAFSY) and its viability has been demonstrated at a pre-industrial level for coating metallic substrates. The NiAl-based coatings produced by CAFSY exhibit very high integrity with good adhesion, very low porosity, high surface hardness and high erosion resistance at a substantially lower cost than equivalent coatings using pre-prepared alloy powders.

show abstract

“…Many research attempts related to protective film coating have been done to improve hot corrosion and oxidation resistance of IN738. [2][3][4][5] Formation of intermetallic compound, for example nickel aluminide, covering entire surface is one way to increase oxidation resistance of IN738. The nickel aluminide layer acts as an aluminum sink, therefore, alumina film can form at high temperature as a protective layer retarding oxygen diffusion as well as oxidation.…”

Section: Introductionmentioning

confidence: 99%