Erratum

Niu, Y.; Gesmundo, F.; Viani, F.; Wu, W.

doi:10.1007/bf01675268

Cited by 6 publications

(6 citation statements)

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“…A similar phenomenon occurs during the oxidation of Ag-Cu alloys. 25,26 It is well known that Cu oxidizes to form copper oxides via the predominantly outward diffusion of Cu. Under normal oxidizing conditions, the noble element, Ag, is not oxidized.…”

Section: Resultsmentioning

confidence: 99%

Oxidation of Ti3SiC2 between 900 and 1200 °C in Air

Lee

Park²

2006

Oxid Met

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Ti 3 SiC 2 materials were synthesized by hot pressing using a new startingmaterial system consisting of a TiC x (x=0.6)/Si powder mixture. The oxidation of Ti 3 SiC 2 at temperatures between 900 and 1200°C in air for up to 100 h resulted in the formation of an outer TiO 2 layer, an intermediate SiO 2 -rich layer and an inner (TiO 2 + SiO 2 ) mixed layer. During oxidation, Ti diffused outwards to form the outer TiO 2 layer, and oxygen transported inwards to form the inner (TiO 2 + SiO 2 ) mixed layer. At the same time, the carbon in Ti 3 SiC 2 escaped into the air. Below the scale, there was a narrow oxygen-affected zone, The oxidation at the scale-matrix interface proceeded by the disintegration of the lamellar Ti 3 SiC 2 grains to form crystallites with a size of a few tens of nanometers containing oxygen. The detailed scale characteristics and oxidation mechanism are described.

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Section: Resultsmentioning

confidence: 99%

Oxidation of Ti3SiC2 between 900 and 1200 °C in Air

Lee

Park²

2006

Oxid Met

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“…Schaeffer et al [97] have compared the behavior of the y alloy Ti-48A1-2Cr-2Nb with the nickel-base superalloy Rene 80 in a high velocity oxidation test in a burner rig burning Jet A fuel and a hot corrosion test in which sea salt was injected into the burner rig. The cross-sections of the two alloys after the high velocity oxidation test are compared in Figure 28.…”

Section: (Iv) Effect Of Complex Environments On the Oxidation Of Titamentioning

confidence: 99%

Research on oxidation and embrittlement of Intermetallic Compounds in the U.S.

Meier

1996

Materials & Corrosion

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Research on the oxidation behavior of intermetallic compounds has been conducted in the U.S. for many years. However, until about ten years ago, this work focusses on the compounds which are important in Ni-base superalloys and their coatings: mainly Ni3AI and NiAI. More recent work has been directed at systems which may be used in monolithic form or as the base for composites. Work has concentrated on three types of systems: Ni-and Fealuminides, refractory metal compounds, and titanium aluminides. Work on the Ni-and Fe-aluminides has concentrated mainly on adherence problems and some anomolous behavior. Work on the refractory metal compounds, particularly MoSi2 and NbAI3, has dealt with the problem of selectively oxidizing Al or Si from a refractory metal base and various intermediate-temperature forms of degradation, such as "pesting". It has become increasingly more clear that, for a number of reasons, the titanium aluminides will be the first "new" metallic materials introduced into commercial hightemperature applications (probably aircraft gas turbines and automobiles engines) in many years. As a result a very large amount of work is being done on the oxidation behaviour of these compounds. Initial work dealt with oxidation mechanisms at temperatures on the order of 1000°C. However, both oxidation and mechanical property considerations dictate that the alloys will not be used at temperatures much above 750°C. Therefore, current work is being focussed on oxidation mechanisms at lower temperature and on what may be the "Achilles heel" of these materials, environmental embrittlement.This paper summarizes the work being done in the US. and highlights work on what the author believes are the more important problems.Forschung auf dem Gebiet des Oxidationsverhaltens von intermetallischen Verbindungen wird in den USA seit vielen Jahren durchgefiihrt. Bis vor etwa zehn Jahren beschrankten sich die Arbeiten jedoch auf Verbindungen, die in Nickelbasis-Superlegierungen und ihren Beschichtungen wichtig sind: im wesentlichen Ni,A1 und NiAI. Neuere Arbeiten haben sich mit Systemen beschaftigt, die in monolithischer Form oder als Basis fur Verbundwerkstoffe genutzt werden konnen. Die Arbeiten konzentrieren sich auf drei Typen von Systemen: Ni-und Fe-Aluminide, Verbindungen der refraktaren Metalle und Titanaluminide. Arbeiten an Ni-und Fe-Aluminiden haben sich hauptsachlich mit Haftungsproblemen und einigen anomalen Verhaltensweisen beschaftigt. Arbeiten an Verbindungen der refraktaren Metalle, im wesentlichen MoSi2 und NbAI,, befassen sich mit dem Problem der selektiven Oxidation von A1 oder Si aus dem refraktaren Basismetall und verschiedenen Formen der Schadigung im mittleren Temperaturbereich, wie z. B. dem Pest-Effekt. Aus einer Reihe von Griinden wurde zunehmend klarer, daB die Titanaluminide die ersten ,,neuen" Werkstoffe sein werden, die in mehreren Jahren in kommerziellen Hochtemperaturanwendungen (wahrscheinlich Flugzeuggasturbinen und Kraftfahrzeugmotoren) eingefiihrt werden. Deshalb sind zahlreiche Untersuchungen...

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“…Thus, a Cr content of 17.5 at.% is likely to produce a selective oxidation of the reactive component Cr over the quaternary two-phase Cu-40Ni-17.5Cr-2.5Al alloy surface. The critical Cr content required to form the selective external oxidation over quaternary two-phase Cu-Ni-Cr-Al alloy surface is rather lower than those over ternary two-phase and three-phase Cu-Ni-Cr alloy, or many binary twophase alloy surface [8][9][10][11][12][16][17][18][19].…”

Section: Discussionmentioning

confidence: 98%