Present state and trend of development of surface coating methods against oxidation and corrosion at high temperatures

1972 ◽  
Vol 1 (1) ◽  
pp. 71-76 ◽  
Author(s):  
G. Lehnert ◽  
H. Meinhardt
Keyword(s):  
High Temperatures ◽  
Present State ◽  
Surface Coating ◽  
Coating Methods ◽  
Oxidation And Corrosion ◽  
Trend Of Development

scholarly journals Morphology and Structure of Compacted Coated Powders Studied by SEM and TEM

2008 ◽  
Vol 14 (S3) ◽  
pp. 31-34
Author(s):  
F. Simões ◽  
B. Trindade
Keyword(s):  
High Temperatures ◽  
Material Properties ◽  
Room Temperature ◽  
Coating Layer ◽  
Bulk Material ◽  
Hot Isostatic Pressing ◽  
Al Alloys ◽  
Morphology And Structure ◽  
High Plastic ◽  
Oxidation And Corrosion

The interest in titanium based intermetallics, such as Ti-Al alloys, for high temperatures applications has been increased in recent years mainly due to their high plastic deformation resistance, chemistry stability (oxidation and corrosion resistance) and creep and fatigue resistance at high temperatures. However, the industrial application of Ti-Al intermetallics is very limited so far, due to the lack of ductility and fracture toughness at room temperature with associated processing difficulties. To overcome this problem and to improve mechanical properties of Ti-Al intermetallics, a powder mixture with atomic composition of Ti52Al48 was synthesized by mechanical alloying (MA) and subsequently coated with a ductile element (aluminium), by d.c. magnetron sputtering. Later, in order to obtain a compacted material, as final step, the coated MA'ed powders were submitted to hot isostatic pressing (HIP), giving rise to a bulk material. The aim of the current work is to understand the influence of coating layer in mechanical alloyed (MA'ed) powders and the influence in bulk material properties.

The Problems of Sealing Hydrogen Peroxide in a 3000-F Environment

1962 ◽  
Vol 84 (4) ◽  
pp. 341-344
Author(s):  
R. J. Matt
Keyword(s):  
Hydrogen Peroxide ◽  
High Temperatures ◽  
Present State ◽  
Low Temperatures ◽  
Power Plants ◽  
State Of The Art ◽  
Aerodynamic Heating ◽  
Flight Vehicles ◽  
Chemical Attack ◽  
Fuel Tanks

With the advent of advanced flight vehicles powered by ramjet power plants, fuel accessory equipment, such as turbopumps, will be subjected to severe environments of: (1) High temperatures (from power plants or aerodynamic heating); (2) low temperatures (from cryogenic fuel tanks); (3) chemical attack (from fuels and oxidizers). The present state-of-the-art is nebulous concerning the seals for this type of application and any successful effort toward the advancement of the art may be of considerable assistance to others in the field. It is with this idea in mind that this paper is presented.

Development of high temperature creep resistance in Fe-Al alloys

2004 ◽  
Vol 842 ◽  
Author(s):  
D. G. Morris ◽  
M. A. Muñoz-Morris ◽  
C. Baudin
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Creep Resistance ◽  
Good Strength ◽  
Thermally Activated ◽  
Intermediate Temperature Range ◽  
Deformation Processes ◽  
Good Creep Resistance ◽  
Oxidation And Corrosion ◽  
Very High

ABSTRACTMost of the studies aimed at the development of creep-resisting Fe-Al intermetallics have been oriented at application temperatures of the order of 500–650°C, where these materials may compete with conventional stainless steels. The Fe-Al intermetallics are, however, particularly excellent in their oxidation and corrosion resistances at temperatures of the order of 1000°C, where Chromium-Nickel steels are no longer able to withstand the aggressive environments. This presentation is part of a study aimed at the development of good creep resistance at such high temperatures.Studies of a variety of cast Fe3Al-base alloys, strengthened by solution or precipitate/dispersoid-forming alloying additions, are reported. The alloys show good strength from room temperature to about 500°C, but thereafter strength falls rapidly as thermally-activated deformation processes become operative. Solution additions are capable of producing good low temperature strength, but do not contribute significantly to creep strength at very high temperatures (above 700°C). Precipitation hardening has been examined in Nb-containing alloys, where Fe2Nb Laves precipitates form at intermediate temperatures. These materials show good strength up to about 700°C, but at higher temperatures the fine precipitates coarsen excessively. Strengthening in the intermediate temperature range varies depending on whether the solute is precipitated prior to high temperature testing or concurrent with this.

METGLAS MBF-17/MBF-17A

Alloy Digest ◽  
1984 ◽  
Vol 33 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glass ◽  
Physical Properties ◽  
High Temperatures ◽  
Turbine Blades ◽  
High Strength ◽  
Heat Treating ◽  
Oxidation And Corrosion

Abstract METGLAS MBF-17A is a brazing foil in ductile, flexible metallic-glass form (A similar grade, MBF-17, is identical except that it has larger dimensional tolerances). It provides high strength at both elevated and room temperatures with moderate oxidation and corrosion resistance. An example of application is brazing turbine blades in truck engines where high strength at high temperatures is required. This datasheet provides information on composition, physical properties, and microstructure. It also includes information on forming, heat treating, and joining. Filing Code: Ni-303. Producer or source: Allied Corporation.

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