Corrosion behavior of ZrB 2 –SiC–Graphite ceramic in strong alkali and strong acid solutions

Wang, Zhi; Zhao, Quanyue; Li, Jing; Wu, Zhanjun; Sun, Xianbo

doi:10.1016/j.ceramint.2015.10.075

Cited by 8 publications

(2 citation statements)

References 24 publications

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“…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), 14–24 nitrides (BN, Si 3 N 4 ), 25–27 diborides (AlB 2 , TiB 2 , HfB 2 , TaB 2 , and NbB 2 ), 28–32 silicides (MoSi 2 ), 33 and so on. The formation of ZrB 2 composites also can improve the oxidation, ablation, corrosion and thermal shock resistance 34–37 . Besides, the ZrB 2 ‐based ceramics can be textured to enhance the toughness and damage tolerance due to their anisotropy hexagonal structure 38–40 …”

Section: Introductionmentioning

confidence: 99%

“…The formation of ZrB 2 composites also can improve the oxidation, ablation, corrosion and thermal shock resistance. [34][35][36][37] Besides, the ZrB 2based ceramics can be textured to enhance the toughness and damage tolerance due to their anisotropy hexagonal structure. [38][39][40] In recent years, the development of high-entropy ceramics (HECs) has provided a good opportunity for improving the performances of ZrB 2 -based ceramics by designing multicomponent solid solutions at atomic level due to high entropy effect, lattice distortion effect, sluggish diffusion, and "cocktail" effect.…”

Section: Introductionmentioning

confidence: 99%

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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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