Protection of graphite from oxidation at 2100 deg C.

Criscione, J. M.; Smith, A. W.; Volk, H. F.

doi:10.2514/3.3779

Cited by 16 publications

(9 citation statements)

References 5 publications

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“…The ablation mechanism of the coating under oxyacetylene flame was a combined effect of thermo-chemicals ablation, thermo-physicals and thermo-mechanical attacks. Ir was not expected to form a protective oxide coating because of the formation of the volatile IrO 3 above 1000 • C in air [7,21]. The defects on the surface of the coating provided pathways for oxygen to penetrate the coating and attack the C/C composites.…”

Section: Resultsmentioning

confidence: 99%

“…For the expensive price and important role, the preparation method of Ir coating has received great concern. Magnetron sputtering, electro-chemical deposition, metalorganic chemical vapor deposition (MOCVD), laserinduced chemical decomposition (LICD) and double glow plasma (DGP) processes have prepared Ir coating [1,[6][7][8][9][10][11]. Ultramet's 100% dense and ductile Ir coatings by CVD could provide tens of hours of useful operation in high stress environment such as liquid rocket motor [12].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and evolution of iridium coating on the C/C composites ablated by oxyacetylene torch

Chen

Cheng

et al. 2010

Acta Astronautica

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and evolution of iridium coating on the C/C composites ablated by oxyacetylene torch

Chen

Cheng

et al. 2010

Acta Astronautica

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“…Another series of composite materials has also been developed by reactive infiltration of Si-M alloys (M = Fe, Co, Ni, Al) [19][20][21][22][23], some of them with excellent properties for advanced armor systems [24]. On the other hand, the use of iridium as an oxidation protector in extreme conditions is well-established, such as in the leading edge of the space shuttle [25]. Ir is practically impermeable by oxygen at temperatures below 2000 • C, as is the case with Ir-Si alloys [26,27].…”

Section: Introductionmentioning

confidence: 99%

SiC-IrSi3 for High Oxidation Resistance

2019

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SiC is a material with excellent mechanical and thermal properties but with a high production cost. Obtaining SiC by reactive infiltration is an attractive method with a much lower cost than the traditional sintering process. However, the reactive infiltration process presents a serious problem, which is the high residual silicon content, which decreases its applicability. The replacement of silicon with silicides is a widely used alternative. The present investigation shows the good mechanical properties of the SiC-IrSi3 composite material obtained by reactive infiltration of SiC-C preforms with Ir–Si alloys. The thermomechanical analysis shows a high compatibility of silicide with SiC. The presence of the silicide shows a substantial improvement against the oxidation of the SiC-Si composites.

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“…In the last 25 years, the idea of transforming silicon into silicides has been worked on, such as the SiC / MoSi2 system [17,18], this composite material is for industrial use today, another series of composites materials has also been developed by reactive infiltration of Si-M alloys (M = Fe, Co, Ni, Al) [19][20][21][22], some of them with excellent properties for advanced armor system [23]. On the other hand it is well known to use Iridium as an oxidation protector in extreme conditions, such as the leading edge of the space shuttle [24][25]. Ir is practically impermeable by oxygen at temperatures below 2000 ° C, as is the case with Ir-Si alloys [26][27].…”

Section: Introductionmentioning

confidence: 99%

SiC-IrSi<sub>3</sub> for High Oxidation Resistance

Camarano

Giuranno

Narciso

2019

Preprint

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SiC is a material with excellent mechanical and thermal properties, but with a high production cost. Obtaining SiC by reactive infiltration is an attractive method and at a much lower cost than the traditional sintering process. However, the reactive infiltration process presents a serious problem, which is the high residual silicon content, which decreases its range of application. The replacement of silicon with silicides is a widely used alternative. The present investigation shows the good mechanical properties of the SiC/IrSi3 composite material obtained by reactive infiltration of SiC/C preforms with Ir-Si alloys. The thermomechanical analysis shows a high compatibility of silicide with SiC. The presence of the silicide shows a substantial improvement against the oxidation of the SiC/Si composites.

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Protection of graphite from oxidation at 2100 deg C.

Cited by 16 publications

References 5 publications

Microstructure and evolution of iridium coating on the C/C composites ablated by oxyacetylene torch

Microstructure and evolution of iridium coating on the C/C composites ablated by oxyacetylene torch

SiC-IrSi3 for High Oxidation Resistance

SiC-IrSi<sub>3</sub> for High Oxidation Resistance

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