Single-phase (Hf-Mo-Nb-Ta-Ti)C high-entropy ceramic: A potential high temperature anti-wear material

Sun, Qichun; Tan, Hui; Zhu, Shengyu; Zhu, Zongxiao; Wang, Long; Cheng, Jun; Yang, Jun

doi:10.1016/j.triboint.2021.106883

Cited by 56 publications

(31 citation statements)

References 41 publications

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“…Sun et al [821] developed a single phase (Hf0.2Mo0.2Nb0.2Ta0.2Ti0.2)C high entropy ceramics (HEC) by spark plasma sintering (SPS) process at different sintering temperatures (1,900, 1,950, 2,000, and 2,050 °C, respectively) and analysed as to how their microstructure and temperature affect its mechanical and tribological properties. Tribological tests were conducted using an Al 2 O 3 ball on HEC disc configuration in the temperature range 25-900 °C under unidirectional sliding condition.…”

Section: Methodsmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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Section: Methodsmentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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“…Refractory transition metal carbides are widely used in extreme environment fields, such as supersonic vehicle and engine inlet leading edge, high speed missile rudder, and cutting tool, due to their high melting point, extreme hardness, excellent mechanical properties, and physicochemical stability 1–6 . To meet the requirements of material performance under extreme conditions, the multi‐component ultra‐high temperature ceramics are attracting wide attentions and becoming one of the promising candidates for the final applications 7–9 . Correspondingly, various kinds of high‐entropy ceramics have been developed rapidly 1 .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6] To meet the requirements of material performance under extreme conditions, the multi-component ultra-high temperature ceramics are attracting wide attentions and becoming one of the promising candidates for the final applications. [7][8][9] Correspondingly, various kinds of high-entropy ceramics have been developed rapidly. 1 In particular, high-entropy carbides (HECs) present excellent mechanical properties, 10 low thermal conductivity, 11,12 good thermal expansion, 12 high oxidation resistance, [13][14][15] high corrosion resistance, 16 and high irradiation resistance, 17 which play a significant role in aerospace, nuclear energy, machinery, metallurgy, and other extreme environment fields.…”

Section: Introductionmentioning

confidence: 99%

Local orders, lattice distortions, and electronic structure dominated mechanical properties of (ZrHfTaM1M2)C (M = Nb, Ti, V)

et al. 2022

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High‐entropy carbides (HECs) are regarded as potential candidate structural materials with attractive mechanical properties due to their ultra‐high hardness. It is essential to reveal the atomic and electronic basis for strengthening mechanism in order to develop the advanced HECs. In the present work, (Zr0.2normalHf0.2normalTa0.2M0.21M0.22false)${\rm{(Z}}{{\rm{r}}_{{\rm{0}}{\rm{.2}}}}{\rm{H}}{{\rm{f}}_{{\rm{0}}{\rm{.2}}}}{\rm{T}}{{\rm{a}}_{{\rm{0}}{\rm{.2}}}}{\rm{M}}_{{\rm{0}}{\rm{.2}}}^{\rm{1}}{\rm{M}}_{{\rm{0}}{\rm{.2}}}^{\rm{2}}{\rm{)}}$C (M = Nb, Ti, V) are selected as case studies. The effects of transition metals (M) on the lattice parameters, bulk modulus, enthalpy of formation, electron work function (EWF), and bonding morphology/strength of HECs are comprehensively studied by first‐principles calculations. It is found that the lattice parameters, equilibrium volumes, and bulk modulus of HECs are improved with the increase of M atomic volumes. The atomic‐size differences among various groups of elements not only result in the lattice mismatch/distortion but also contribute to the formation of weak spots. In the view of bonding charge density, the electron redistributions caused by the coupling effect of the lattice distortion and valance electron differences can be revealed obviously, which identify the different bonding strength. Moreover, in terms of EWF, the proposed power‐law‐scaled hardness of HECs is validated and matches well with those reported theoretical and experimental results, providing a strategy to design advanced HECs with excellent mechanical properties.

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“…For example, the hardness of the (HfNbTaTiZr)C carbide ranged from 29.7 to ∼40 GPa, while possessing 3–6‐MPa m 1/2 fracture toughness 16,18,28 . In addition to mechanical properties, HECCs, such as (HfZrTaNbTi)C, (HfTaZrNb)C, (ZrTaNbTi)C, and (HfMoNbTaTi)C, were found also outperforming conventional binary TMCs on the resistance to oxidation, 29‐32 radiation, 33 and wear 34 …”

Section: Introductionmentioning

confidence: 99%

“…16,18,28 In addition to mechanical properties, HECCs, such as (HfZrTaNbTi)C, (HfTaZrNb)C, (ZrTaNbTi)C, and (HfMoNbTaTi)C, were found also outperforming conventional binary TMCs on the resistance to oxidation, [29][30][31][32] radiation, 33 and wear. 34 Recently, we 35 successfully synthesized singlephase ternary-cation (NbTaZr)C, quaternary-cation (NbTaZrW)C and (NbTaZrHf)C, and quinary-cation (HfNbTaWZr)C carbides using spark plasma-sintering technique and investigated their mechanical properties. The hardness and fracture toughness of this series of HECCs also exhibited superiority compared to conventional binary carbides and other reported HECCs.…”

Section: Introductionmentioning

confidence: 99%

Toughening (NbTaZrW)C high‐entropy carbide ceramic through Mo doping

Zhang

et al. 2022

J Am Ceram Soc.

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Previously, we investigated the mechanical properties of a series of multi‐cation high‐entropy ceramic carbides and found that (NbTaZrW)C exhibits the best combination of nanohardness and toughness. In the current study, we explored the possibility of further hardening and/or toughening of this carbide through cation‐site Mo doping. The results show that MoC has at least 20 at.% solubility in (NbTaZrW)C. There is a tight positive relationship between average lattice distortion and mixing enthalpy; and when cation‐site Mo content is below 10 at.%, the “entropy effect” outweighs the “enthalpy effect,” leading to increased phase stability. As Mo content increases, the sacrifice of hardening is much less pronounced in comparison with that of the achievement of toughening. Quantitatively, as Mo in cation sites increases to 20 at.%, the toughness of (NbTaZrW)C is increased by ∼18%, whereas the nanohardness undergoes only ∼7% reduction. More intriguing, the 5 at.% Mo‐doped (NbTaZrW)C exhibits simultaneous improvement of nanohardness and toughness. This hardening/toughening behavior is associated with the complex and hybrid effects from lattice distortion, bonding nature as well as dislocation slip behavior. In general, this study shows the possibility of paving the way for the design and search of novel transition metal carbides with a better combination of hardness and toughness.

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Single-phase (Hf-Mo-Nb-Ta-Ti)C high-entropy ceramic: A potential high temperature anti-wear material

Cited by 56 publications

References 41 publications

A review of advances in tribology in 2020–2021

A review of advances in tribology in 2020–2021

Local orders, lattice distortions, and electronic structure dominated mechanical properties of (ZrHfTaM1M2)C (M = Nb, Ti, V)

Toughening (NbTaZrW)C high‐entropy carbide ceramic through Mo doping

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