The effect of a graphite addition on oxidation of ZrB2–SiC in air at 1500°C

Rezaie, Alireza R.; Fahrenholtz, William G.; Hilmas, Gregory E.

doi:10.1016/j.jeurceramsoc.2012.09.016

Cited by 45 publications

(17 citation statements)

References 33 publications

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“…UHTCs have recently attracted significant research interest because of potential candidates for thermal protection systems (TPSs) of hypersonic aerospace vehicles and reusable atmospheric re-entry vehicles [5][6][7][8][9]. Among the UHTCs, ZrB 2 has the lowest theoretical density (6.09 g/cm 3 ) and high thermal conductivity, which is considered as one of the most attractive candidates for high temperature structural applications, including atmospheric re-entry, hypersonic flight, and rocket propulsion [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Xiang

Cheng

Lan

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Xiang

Cheng

Lan

et al. 2015

Journal of Alloys and Compounds

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“…Simple method is proposed to fabricate UHTC based composites with short carbon fibers as both a reinforcing and mass-lightening phase [16]. Some works have been done on UHTCs reinforced with carbon spheres or short fibers [17][18][19][20][21]. There are few works concerning the performance of UHTC-rich matrix under oxidizing atmospheres.…”

Section: Introductionmentioning

confidence: 99%

Ablation properties of ZrC-SiC-HfB₂ ceramic with different amount of carbon fiber under an oxyacetylene flame

Shojaie-Bahaabad

Hasani-Arefi

2020

Mater. Res. Express

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In the present work, a carbon fiber reinforced ZrC-20 vol% SiC-15 vol% HfB 2 composite was produced by pressureless sintering method. Carbon fiber with various weight percentages (0, 10, 20, 30) was added to the milled ZrC-SiC-HfB 2 . The mixed powders were pressed and sintered at 2200°C for 2 h. The microstructure and mechanical properties of the specimens were investigated by Scanning Electron Microscope (SEM) equipped with EDS spectroscopy, XRD analysis and hardness and toughness tests. The ablation resistance of the composites was performed by oxyacetylene torch. The results showed that as the carbon fiber content was increased, the porosity and toughness were increased as well, while the hardness and density were decreased. During the ablation test, the outer surface of the composite underwent a sintering process and formed a dense layer of Zr-Hf-Si-O on the surface. ZrSiO 4 and HfSiO 4 were also created after cooling, so these phases played a pinning effect and prevented the crack propagation. The results also showed that linear and mass ablation rates were increased with increasing the weight percentage of the carbon fiber. SEM analysis with EDS further revealed that with increasing the carbon content, the defects in the formed oxide layer on the composite surface were increased due to the evaporation of SiO 2 and the decrease in the pinning effect of ZrSiO 4 and HfSiO 4 phases as well as the phase transformation of the remained ZrO 2 and HfO 2 . As a result, as the carbon fiber was increased, the ablation resistance of the composite was decreased.

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“…Moreover, ZrSiO 4 not only has low permeability for oxygen and high thermal stability at high temperature, but also can reduce the consumption of SiO 2 and to a large extent improve the oxidation resistance ability of ceramics [5][6][7]. Owing to these advantages, introducing UHTCs into coating is considered to be a promising solution to the poor oxidation resistance of C/C composites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy

Xue

Zhou

et al. 2018

J Adv Ceram

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ZrB 2 -ZrC-SiC ternary coatings on C/C composites are investigated by reactive melt infiltration of ZrSi 2 alloy into pre-coatings. Two different pre-coating structures, including porous B 4 C-C and dense C/B, are designed by slurry dip and chemical vapor deposition (CVD) process respectively. The coating prepared by reactive melt infiltration (RMI) into B 4 C-C presents a flat and smooth surface with a three-layer cross-sectional structure, namely interior SiC transition layer, gradient ZrB 2 -ZrC-SiC layer, and ZrB 2 -ZrC exterior layer. In comparison, the coating prepared by RMI into C/B shows a more granular surface with a different three-layer cross-sectional structure, interior unreacted B-C pre-coating layer, middle SiC layer, and exterior ZrB 2 -ZrC-ZrSi 2 layer. The forming mechanisms of the specific microstructures in two coatings are also investigated and discussed in detail.

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The effect of a graphite addition on oxidation of ZrB2–SiC in air at 1500°C

Cited by 45 publications

References 33 publications

Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Ablation properties of ZrC-SiC-HfB₂ ceramic with different amount of carbon fiber under an oxyacetylene flame

Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy

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The effect of a graphite addition on oxidation of ZrB2–SiC in air at 1500°C

Cited by 45 publications

References 33 publications

Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Mechanical and ablation properties of laminated ZrB2–SiC/BN ceramics

Ablation properties of ZrC-SiC-HfB2 ceramic with different amount of carbon fiber under an oxyacetylene flame

Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy

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Ablation properties of ZrC-SiC-HfB₂ ceramic with different amount of carbon fiber under an oxyacetylene flame