Materials for temperatures above 1500°C in oxidizing atmospheres. Part II: Experimental results on the oxidation of MoSi2 composites and coated RSiC

Bundschuh, K.; Schütze, M.

doi:10.1002/1521-4176(200104)52:4<268::aid-maco268>3.0.co;2-c

Cited by 6 publications

(1 citation statement)

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“…This can be explained by a smaller affected surface area (15% less when particles are distributed ideally) and a faster growing oxide scale. Bundschuh et al measured no initial mass loss for MoSi 2 /SiC composites when the amount of SiC was sufficiently high and explained this with the formation of a dense SiO 2 scale from SiC particles [6]. In case of the HfO 2 reinforced MoSi 2 composite the mentioned accelerated diffusion of oxygen caused rapid sealing of the surface and a high oxidation rate throughout the testing time, see Fig.…”

Section: Thermogravimetric Measurementsmentioning

confidence: 99%

Oxidation behaviour of particle reinforced MoSi₂composites at temperatures up to 1700°C.

Lohfeld

Schütze²,

Böhm³

et al. 2005

Materials and Corrosion

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The topic "Oxidation behaviour of particle reinforced MoSi 2 composites at temperatures up to 1700 8C" is discussed in a three part publication. In the first part of this paper a literature survey on the oxidation behaviour of MoSi 2 and MoSi 2 composites has been given. In the second part an initial screening at 1600 8C revealed those composites which may be suitable for high temperature applications. The low temperature oxidation behaviour of selected composites in the "pest" region was examined as well. Additionally, the effect of iron impurities on the high temperature behaviour of the composites was explained. The present part deals with a detailed investigation of an optimised MoSi 2 /HfO 2 composite. These investigations include high temperature oxidation at 1500 to 1700 8C and low temperature oxidation at 400 and 500 8C.

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Section: Thermogravimetric Measurementsmentioning

confidence: 99%

Oxidation behaviour of particle reinforced MoSi₂composites at temperatures up to 1700°C.

Lohfeld

Schütze²,

Böhm³

et al. 2005

Materials and Corrosion

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Materials for temperatures above 1500°C in oxidizing atmospheres. Part III: Contact reaction tests

Bundschuh

Schütze

2001

Materials and Corrosion

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High-temperature and electrochemical oxidation of transition metal silicides

Chirkin

Lavrenko

Talash

2009

Powder Metall Met Ceram

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546.281:541.138 High-temperature and electrochemical oxidation of transition metal silicides, which are widely used in microelectronics as ohmic contacts and protective coatings for high-temperature alloys, are discussed in this review. The process of oxide film formation during annealing or anodizing is extremely important for both applications of silicides. It is discussed for three disilicides: MoSi 2 , WSi 2 , and TiSi 2 . It has been shown that different types of oxide films may form on the disilicide surface depending on the thermodynamic (formation enthalpies of silicides and associated oxides) and kinetic (diffusion coefficients of silicon in silicide and oxygen diffusivity in oxide) factors: onephase (MoSi 2 ), mixed (WSi 2 ), and multilayer (TiSi 2 ) films. The "silicide pest" phenomenon is discussed in terms of thermodynamic, kinetic, and structural factors influencing the pesting. Analysis of electrochemical oxidation mechanisms for silicides in various electrolyte media reveals numerous similarities between anodic and high-temperature oxidation mechanisms. It is shown that slow silicon transport during anodic treatment at room temperature leads to the formation of multiphase mixed oxide films under electrochemical polarization.Keywords: transition metal silicides, kinetics of high-temperature oxidation, formation mechanism, protective oxide films containing SiO 2 , anodic electrochemical oxidation, electrolyte solutions.Binary refractory compounds of elements from groups 4-6 of the Periodic Table with carbon, boron, nitrogen, and silicon--carbides, borides, nitrides, silicides, and associated composites⎯are very promising materials owing to their excellent, as compared with the initial metals, high-temperature oxidation resistance and chemical stability. These materials are widely used in different engineering areas. New composite materials based on refractory compounds with desired properties constantly show up.Transition metal silicides are widely used in modern engineering. They are remarkable for their significant physical and technical properties: relatively low density, metal conductivity, high corrosion resistance, which are needed in engineering areas using high temperatures, rates, loads, and corrosive media. These are aerospace structures, high-temperature heaters, corrosion protective coatings on refractory alloys, etc. [1]. For example, the high melting temperature combined with the corrosion resistance of semiconducting silicides (Cr, Mn, and Fe disilicides) are the very properties required for thermoelectric generators that convert solar energy into electric energy.

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Materials for temperatures above 1500°C in oxidizing atmospheres. Part II: Experimental results on the oxidation of MoSi2 composites and coated RSiC

Cited by 6 publications

References 4 publications

Oxidation behaviour of particle reinforced MoSi₂composites at temperatures up to 1700°C.

Oxidation behaviour of particle reinforced MoSi₂composites at temperatures up to 1700°C.

Materials for temperatures above 1500°C in oxidizing atmospheres. Part III: Contact reaction tests

High-temperature and electrochemical oxidation of transition metal silicides

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Materials for temperatures above 1500°C in oxidizing atmospheres. Part II: Experimental results on the oxidation of MoSi2 composites and coated RSiC

Cited by 6 publications

References 4 publications

Oxidation behaviour of particle reinforced MoSi2composites at temperatures up to 1700°C.

Oxidation behaviour of particle reinforced MoSi2composites at temperatures up to 1700°C.

Materials for temperatures above 1500°C in oxidizing atmospheres. Part III: Contact reaction tests

High-temperature and electrochemical oxidation of transition metal silicides

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Product

Resources

About

Oxidation behaviour of particle reinforced MoSi₂composites at temperatures up to 1700°C.

Oxidation behaviour of particle reinforced MoSi₂composites at temperatures up to 1700°C.