Oxidation behaviour of a (Mo, W)Si2-based composite in dry and wet oxygen atmospheres in the temperature range 350–950°C

Hellström, Kristina; Tang, Jun Eu; Jonsson, Torbjörn; Halvarsson, Mats; Pompe, Robert; Sundberg, Mårten; Svensson, Jan‐Erik

doi:10.1016/j.jeurceramsoc.2008.12.009

Cited by 10 publications

(8 citation statements)

References 9 publications

(17 reference statements)

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“…The lower viscosity of the scale implies that the (Mo,W)Si 2 -based composite with boride addition can be expected to form a protective scale at lower temperature compared to the corresponding boride-free material. This is supported by a comparison of the present results with the reported oxidation behavior of boride-free (Mo,W)Si 2 [21] where the downturn of the mass change/T curve (compare Fig. 2) occurs at 100-150 C higher temperature.…”

Section: Discussionsupporting

confidence: 89%

“…This may lead to an increased oxidation rate at high temperature. However, a comparison of the present results with literature reports on the oxidation of the boride-free material shows no such adverse effect [21]. Also, boron oxide has been reported to vaporize from SiO 2 / B 2 O 3 scales above 750 C [3].…”

Section: Discussionsupporting

confidence: 59%

“…12). This is analogous to MoSi 2 and (Mo,W)Si 2 which form a protective dense silica scale when oxidized at high temperature (see Introduction) [11,21]. In both cases, the beneficial effect of high temperature in forming a dense silica scale, is attributed to the increasing diffusivity of silica.…”

Section: Discussionmentioning

confidence: 83%

“…The major phase of the material is then the (Mo,W)Si 2 phase. The oxidation behavior of a (Mo,W)Si 2 -based composite under the product name Kanthal Super 1900 (KS1900) was previously investigated [21]. It was shown that the oxidation is similar to that of the MoSi 2 -based composite Kanthal Super 1800 (KS 1800) [11], however, the peak oxidation temperature of the (Mo,W)Si 2 material was shifted towards higher temperatures, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Oxidation behavior at 300–1000°C of a (Mo,W)Si2-based composite containing boride

et al. 2010

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Oxidation behavior at 300–1000°C of a (Mo,W)Si2-based composite containing boride

et al. 2010

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“…Their high thermal and chemical stabilities remain up to h igh temperatures, which makes them p ro mising as materials for refractory coatings, various parts for aircraft and space engineering as well as for metallurg ical and chemical industry [1][2][3][4][5]. A mong all of the silicides, MoSi 2 based materials are most known for high temp eratu re ap p licatio n .…”

Section: Introductionmentioning

confidence: 99%

Features of the Solid Solution (Mo0.9,Cr0.1)Si2 Formation Depending on the State of Initial Mixture

Kud¹,

Ieremenko²,

Likhoded³

et al. 2013

MATERIALS

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The regularities of solid state synthesis of the solid solution (Mo 0.9 ,Cr 0.1 )Si 2 in vacuum have been investigated in the temperature range 400-1200℃ depending on the dispersity and energetic state of the init ial powders, name ly mo lybdenum, chro miu m and silicon. The energetic state of the in itial mixture was established to be a determin ing factor which affects the principal features of solid state interaction whereas an increase in dispersity only influences the temperature of the interaction start. When non-activated initial mixtures and ones mechanically activated in a p lanetary mill with lo w number of dru m revolutions were used, the solid solution formation proceeded owing to diffusion of silicon into meta ls through successive formation of lo wer and higher molybdenum-based silicide phases followed by their interaction. Mechanical activation in a planetary mill with high number of dru m revolutions was accompanied by not only decrease in particle size but also changes in the energetic state of the reaction mixture, which resulted in changing the regularities of the solid solution formation. Herein solid solutions on the basis of two higher molybdenum silicide phases, tetra-and hexagonal mod ifications, were formed with further poly morphic transition of the unstable high temperature hexagonal β-MoSi 2 phase into the lo w temperature tetragonal α-MoSi 2 phase. It has been established that temperature of the beginning of interaction decreases by 100℃ as compared with non-activated initial mixtures and temperature o f the end of the process depends on the amount of accu mu lated energy: under low energy mechanical activation the process is co mplete at 1200℃, while a h igh energy activation decreases this temperature by 200-400℃ depending on the duration of activation.

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High-temperature crack-healing behaviour and strength recovery of (MoNb)Si2

Zhu

Wang

Lü

et al. 2015

Applied Surface Science

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Oxidation behaviour of a (Mo, W)Si2-based composite in dry and wet oxygen atmospheres in the temperature range 350–950°C

Cited by 10 publications

References 9 publications

Oxidation behavior at 300–1000°C of a (Mo,W)Si2-based composite containing boride

Oxidation behavior at 300–1000°C of a (Mo,W)Si2-based composite containing boride

Features of the Solid Solution (Mo<SUB>0</SUB><SUB>.</SUB><SUB>9</SUB>,Cr<SUB>0</SUB><SUB>.</SUB><SUB>1</SUB>)Si<SUB>2</SUB> Formation Depending on the State of Initial Mixture

High-temperature crack-healing behaviour and strength recovery of (MoNb)Si2

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