On the oxidation behavior of ZrB<sub>2</sub>–SiC–VC composites

Arab, Seyed Mohammad; Asl, Mehdi Shahedi; Kakroudi, Mahdi Ghassemi; Salahimehr, Behnam; Mahmoodipour, Kosar

doi:10.1111/ijac.13858

Cited by 7 publications

(6 citation statements)

References 35 publications

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“…Improving densification by adding sintering aids is the most common and effective approach to promoting the mechanical and thermal properties of ZrB 2 ceramics. 9,10 The choice of sintering aids also focuses on the removal of oxide residue and formation of composites with maintaining of high melting point, that is, carbon, 11,12 graphite, 13 carbides (B 4 C, SiC, TiC, ZrC, VC, and WC), [14][15][16][17][18][19][20][21][22][23][24] nitrides (BN, Si 3 N 4 ), [25][26][27] diborides (AlB 2 , TiB 2 , HfB 2 , TaB 2 , and NbB 2 ), [28][29][30][31][32] silicides (MoSi 2 ), 33 and so on. The formation of ZrB 2 composites also can improve the oxidation, ablation, corrosion and thermal shock resistance.…”

Section: Introductionmentioning

confidence: 99%

ZrB₂‐based solid solution ceramics and their mechanical and thermal properties

Bao

Shen

et al. 2022

Int J Applied Ceramic Tech

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Zirconium diboride ceramics as one of the main members of ultrahightemperature ceramics are capable of being used as structural components at ultrahigh temperatures. Entropy adjusting is a newly developed approach to improving the properties of ceramics. In this work, a series of ZrB 2 -based solid solution ceramics with different mixing entropies, formulated (Zr x Ti y Nb y Ta y )B 2 (x = .25, .85, .925, .9625, 1; x + 3y = 1), were prepared by adjusting the content of other diborides. Diboride solid solution powders were synthesized by boro/carbothermal reduction process and then densified by spark plasma sintering. The results show that the formation of a single-phase solid solution is independent of the mixing entropy in (Zr x Ti y Nb y Ta y )B 2 system. The addition of other diborides into ZrB 2 is beneficial to reduce the particle size of the synthesized powder and promote the densification process. The dense sintered samples with higher mixing entropy have finer grain size, higher hardness, and modulus. The (Zr 0.25 Ti 0.25 Nb 0.25 Ta 0.25 )B 2 ceramic has the highest hardness of 31 GPa and a modulus of 682 GPa. Severe lattice distortion in samples with higher mixing entropy will result in increased phonon scattering and lower thermal conductivity.

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Section: Introductionmentioning

confidence: 99%

ZrB₂‐based solid solution ceramics and their mechanical and thermal properties

Bao

Shen

et al. 2022

Int J Applied Ceramic Tech

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“…It was discovered that [18,19] the rice husk ash-and graphite-based aluminum alloy hybrid compound had a rise in hardness at all weight percent of strengthened particles. It was made in [20,21] with the help of rice husk ash and fly ash. It was discovered that TS and hardness were at their highest at 20% rice husk ash and 20% fly ash [22].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Parameters of Zirconium Carbide and Rice Husk Ash Reinforced with AA 2618 Composites

Mahesha

Suprabha

Thenmozhi

et al. 2022

Advances in Materials Science and Engineering

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Stir casting was utilized to generate the composites. The AA 2618–10wt% zirconium carbide 10wt% rice husk ash hybrid composite had the highest hardness value. In comparison to pure AA 2618, it had a 72% increase. The rule of mixture was used to compute theoretical density, whereas the Archimedes rule was utilized to evaluate real density. For AA 2618, AA 2618/zirconium carbide, and rice husk ash hybrid composites, simple carbide inserts were used for turning. Surface roughness, metal removal rate, and tool wear were among the numerous responses examined. RSM was utilized to analyze and optimize the test outcomes. Feed rate was the most critical issue for surface roughness and material removal rate. Tool wear was shown to be most strongly controlled by tool speed, whereas metal removal rate was found to be least significantly influenced by the weight percent of reinforcement.

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“…Many efforts have been done to increase the oxidation resistance of diborides. These studies showed that the addition of SiC to ZrB2 greatly increases oxidation resistance at high temperatures [36][37][38][39][40][41][42][43]. Thermodynamic calculations of the oxidation of ZrB2-SiC composites showed that the formation of a SiC-rich layer, a Zr-rich oxidized layer and a SiC-depleted ZrB2 layer due to active oxidation of SiC decreased the oxidation rate [44].…”

Section: Introductionmentioning

confidence: 99%

Challenges toward applying UHTC-based composite coating on graphite substrate by spark plasma sintering

2021

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In this study, the UHTC-based composite layers where applied on the graphite substrates using SPS method to protect them against ablation. The protective layers had some defects and problems such as crack, fracture, separation, melting, and weak adhesion to the substrate. Several factors such as the thickness of composite layer, the number of protective layers, the SPS conditions (temperature, applied pressure, soaking time and mold), the chemical composition of the layers, the type of the substrate and the mismatch between the thermal expansion coefficients of the substrate and the applied layer(s) affected the quality and connection of the protective layer to the graphite substrate. The amount of additive materials influenced the melting phenomenon in the composite layer; for example, further MoSi2 in the layer led to more melting. The mismatch between the thermal expansion coefficients of the graphite substrate and the composite layer caused stresses during the cooling step, which resulted in cracks in the applied layer. Hence, proximity in the thermal expansion coefficients seems to be necessary for the formation of an acceptable adhesion between the layer and the substrate.

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On the oxidation behavior of ZrB₂–SiC–VC composites

Cited by 7 publications

References 35 publications

ZrB₂‐based solid solution ceramics and their mechanical and thermal properties

ZrB₂‐based solid solution ceramics and their mechanical and thermal properties

Optimizing the Parameters of Zirconium Carbide and Rice Husk Ash Reinforced with AA 2618 Composites

Challenges toward applying UHTC-based composite coating on graphite substrate by spark plasma sintering

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On the oxidation behavior of ZrB2–SiC–VC composites

Cited by 7 publications

References 35 publications

ZrB2‐based solid solution ceramics and their mechanical and thermal properties

ZrB2‐based solid solution ceramics and their mechanical and thermal properties

Optimizing the Parameters of Zirconium Carbide and Rice Husk Ash Reinforced with AA 2618 Composites

Challenges toward applying UHTC-based composite coating on graphite substrate by spark plasma sintering

Contact Info

Product

Resources

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On the oxidation behavior of ZrB₂–SiC–VC composites

ZrB₂‐based solid solution ceramics and their mechanical and thermal properties

ZrB₂‐based solid solution ceramics and their mechanical and thermal properties