Oxidation and Nitridation Behavior of Cr–Si Alloys in Air at 1473 K

Soleimani-Dorcheh, Ali; Galetz, Mathias C.

doi:10.1007/s11085-015-9544-5

Cited by 44 publications

(13 citation statements)

References 39 publications

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“…Both MoSi 2 and TiSi 2 were reported to be exceptions to this trend with the oxidation layer containing Mo or Ti oxides as well as SiO 2 . On the other hand, reports on the oxidation behavior of Si eutectic alloys have been limited . The present authors have studied the oxidation behavior of HfSi 2 and SiC f /SiC composites using Si‐HfSi 2 eutectic alloy, which contains a high amount of Si.…”

Section: Introductionmentioning

confidence: 83%

“…41 On the other hand, reports on the oxidation behavior of Si eutectic alloys have been limited. [42][43][44] The present authors have studied the oxidation behavior of HfSi 2 and SiC f /SiC composites using Si-HfSi 2 eutectic alloy, 45 which contains a high amount of Si. However, HfSi 2 in the Si-HfSi 2 alloy was oxidized prior to other phases in the composites, and the Si-HfSi 2 alloy showed the same oxidation rate as HfSi 2 .…”

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confidence: 99%

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Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

et al. 2019

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SiC‐fiber–reinforced binary Si eutectic alloy composites have been developed for aerospace applications using the melt infiltration method. In this study, the oxidation mechanisms of various binary Si eutectic alloys were evaluated at elevated temperatures. We suggest that the oxidation resistance of eutectic alloys could be predicted using the Gibbs energy change for the oxidation reaction. Based on these calculations, eutectic alloys of Si‐16at%Ti, Si‐17at%Cr, Si‐22at%Co, Si‐38at%Co, and Si‐27at%Fe were prepared. These alloys produced uniform SiO2 layers and showed the same oxidation resistance as Si at 1000°C under humid conditions. Therefore, SiC composites using Si alloys with excellent oxidation resistance can be predicted using thermodynamic calculations.

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Section: Introductionmentioning

confidence: 83%

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confidence: 99%

Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

et al. 2019

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“…[9] Another work has shown that the presence of silicon modifies the stability of oxides and nitrides. [10] Results showed that 3 at% silicon addition with chromium significantly improved the oxidation and nitridation resistance. The present work does not deal about pure chromium oxidation but particular attention is paid to the evolution of nitride phases during oxidation.…”

Section: Introductionmentioning

confidence: 97%

“…These authors explained that, at 950°C, Cr 2 N, and CrN are the stable nitrides at high‐pN 2 and low‐pO 2 environments . Another work has shown that the presence of silicon modifies the stability of oxides and nitrides . Results showed that 3 at% silicon addition with chromium significantly improved the oxidation and nitridation resistance.…”

Section: Introductionmentioning

confidence: 97%

Influence of atmosphere on high‐temperature oxidation of Fe‐Cr‐Si model alloy

Issartel

Buscail

Mathieu

2019

Materials & Corrosion

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The aim of this study is to show the influence of the gaseous environment on the ferritic Fe‐Cr‐Si model alloy oxidation during 70 hrs, at 900 and 950°C. Two different atmospheres have been used, air or nitrogen containing 5 vol% hydrogen (N2–5%H2). After air oxidation, a nonadherent chromia scale formed. In the N2–5%H2 gaseous environment, it clearly appears that silicon segregation near the internal scale‐metal interface is favoured. In this low oxygen‐containing gas, adherent chromia, and silica scales have been formed. Silica subscale associated to an adherent chromia scale obtained in low‐oxygen conditions are a good protection barrier against carburisation.

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“…In addition, very few studies 2 of 17 have reported the solubility of nitrogen in liquid cobalt-based and chromium-based alloys, especially in chromium-based alloys [11]. The chromium-based alloys have attracted much attention because of their great potential in applications of high-temperature structural materials [21], and chromium-based alloys are more significantly impacted by nitrogen compared to nickel-based alloys [22,23].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Solubility in Liquid Ni-V, Ni-Ta, Ni-Cr-V, and Ni-Cr-Ta Alloys

Qian

Chen

Shu

et al. 2019

Metals

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An investigation has been made concerning the solubility of nitrogen in liquid binary alloys (Ni-V and Ni-Ta) and ternary alloys (Ni-Cr-V and Ni-Cr-Ta) by sampling method. The experiments were carried out in the temperature range from 1773 K to 1873 K and under the nitrogen partial pressure up to 1.0 bar. A technique involving induction melting and a rapid quench device has been used in this study. It has been found that Sieverts’ law successfully describes the nitrogen dissolution in all these liquid alloys up to 1.0 bar of nitrogen gas partial pressure. The additions of vanadium, tantalum and chromium significantly increase the nitrogen solubility, especially vanadium-alloying addition. Furthermore, we have determined the interaction parameters, enthalpies and entropies of nitrogen dissolution in these liquid alloys.

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Oxidation and Nitridation Behavior of Cr–Si Alloys in Air at 1473 K

Cited by 44 publications

References 39 publications

Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

Oxidation mechanisms of SiC‐fiber–reinforced Si eutectic alloy matrix composites at elevated temperatures

Influence of atmosphere on high‐temperature oxidation of Fe‐Cr‐Si model alloy

Nitrogen Solubility in Liquid Ni-V, Ni-Ta, Ni-Cr-V, and Ni-Cr-Ta Alloys

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