Intermetallics最新文献

英文中文

Effect of vanadium content on microstructure, mechanical properties, and oxidation behavior of novel high temperature complex alloy

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-23 DOI: 10.1016/j.intermet.2025.108672

P. Jangra, A.R. Balpande, S.S. Nene

Introducing vanadium (V) in high temperature alloys reduces density and increases its high temperature strength. However, the effect of V on the high temperature oxidation behavior is debatable and hence unclear. In line with that, here we developed Co₃₀Ni_45-xV_xCr₁₅Fe₅Si₅ (at. %) (x = 5, 10, 15, 20, 25, 30) high temperature complex alloys (HT-CAs) (all elements in at. %.) with varying V content and studied its effect on microstructure, mechanical properties and high temperature oxidation behavior (for prolonged exposure of 96 h at 1050 °C) systematically. Microstructural evolution as a function of V content shows a steady transition from single phase f.c.c. structure to multi-phase structure beyond 15 at. % with good compressive formability (ε > 50 %) whereas oxide layer thickness displayed an exponential rise beyond 10 at. % of V with a gradual increase in weight gain upon oxidation. The increased layer thickness (>350 μm) and weight gain (>45 mg/cm²) after oxidation beyond 10 at. % V in these alloys is attributed to the increased V content in the oxide layer suggesting its higher reactivity with oxygen during high temperature exposure. Thus, higher V in the HT-CAs could be detrimental from mechanical properties and oxidation resistance perspectives, hence its content needs to be tailored to minimize the oxidation losses and maximize the component life during service.

在高温合金中加入钒（V）可以降低密度，提高高温强度。然而，钒对高温氧化行为的影响还存在争议，因此尚不明确。为此，我们开发了不同钒含量的 Co30Ni45-xVxCr15Fe5Si5 (at. %) (x = 5, 10, 15, 20, 25, 30) 高温复合合金 (HT-CAs)（所有元素均为 at. %），并系统研究了其对微观结构、机械性能和高温氧化行为（在 1050 °C 下长时间暴露 96 小时）的影响。微观结构演变与 V 含量的函数关系表明，当 V 含量超过 15%时，微观结构从单相 f.c.c. 结构稳定地过渡到多相结构，并具有良好的抗压成形性（ε > 50%），而当 V 含量超过 10%时，氧化层厚度呈指数上升，氧化时重量增加逐渐增加。这些合金的氧化层厚度（350 μm）和增重（45 mg/cm2）在超过 10 % V 值后增加，这是因为氧化层中的 V 值含量增加，表明其在高温暴露期间与氧气的反应性更高。因此，从机械性能和抗氧化性的角度来看，HT-CAs 中较高的 V 可能是有害的，因此需要对其含量进行调整，以尽量减少氧化损失，最大限度地延长部件的使用寿命。

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引用次数: 0

Mechanical properties and high temperature structure evolution of FeCrAlMoNb high entropy alloy coatings with different Mo contents for accident tolerant fuel cladding

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-22 DOI: 10.1016/j.intermet.2025.108670

Sujuan Liu , Yu Wang , Miao Deng , Chunhai Liu , Jingyi Liang , Jun Yi , Weiwei Xiao

FeAlCrMoNb HEA coatings with different Mo contents were prepared on Zr-4 substrates via the magnetron sputtering method. The microstructure, mechanical properties and oxidation resistance of the FeAlCrMoNb coatings with different Mo contents were investigated in detail. The findings of the research revealed that the Mo_0.10, Mo_0.15 and Mo_0.25 coatings were almost amorphous with some BCC nanocrystals present, and the Mo_0.40 coating exhibited BCC structure. Compared with the other coatings, the Mo_0.10 coating had the best mechanical properties and oxidation resistance. During the steam oxidation process at 1100 °C, the formation of surface oxides prevented the entry of O, which endowed the Mo_0.10 coating with a good protective effect on the matrix. Finally, the steam oxidation mechanism of the Mo_0.10 coating was described in detail.

引用次数: 0

Achieving ultrahigh strength and good ductility in a Al5Co21Fe21Mn17Ni36 high-entropy alloy with BCC and FCC crystals 在具有 BCC 和 FCC 晶体的 Al5Co21Fe21Mn17Ni36 高熵合金中实现超高强度和良好延展性

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-21 DOI: 10.1016/j.intermet.2025.108667

M.Z. Wang , Y.F. Shen , W.Y. Xue

A non-equimolar ratio Al₅Co₂₁Fe₂₁Mn₁₇Ni₃₆ HEA is designed, composed of FCC and B2 phases. The ultrahigh yield strength and ultimate tensile strength are achieved at −196 °C, reaching 1100 ± 5 MPa and 1500 ± 10 MPa, respectively, while retaining a considerable ductility of 15 %. During tensile testing, the slip mode of dislocations shifts from cross-slip to planar slip with decreasing temperature from 25 °C to −196 °C due to the nanosized B2 particles. In particular, planar slip is promoted by reducing stacking fault energy at −196 °C, thus effectively promoting the dislocation accumulations around the B2 phase.

设计了一种由 FCC 相和 B2 相组成的非等摩尔比 Al5Co21Fe21Mn17Ni36 HEA。该材料在 -196 ℃ 时达到了超高屈服强度和极限抗拉强度，分别为 1100 ± 5 兆帕和 1500 ± 10 兆帕，同时还保持了 15% 的可观延展性。在拉伸测试过程中，由于纳米级 B2 粒子的存在，随着温度从 25 ℃ 降到 -196 ℃，位错的滑移模式从交叉滑移转变为平面滑移。尤其是在 -196 °C时，平面滑移因堆叠断层能的降低而得到促进，从而有效地促进了位错在B2相周围的聚集。

引用次数: 0

Research on flow stress behavior, constitutive modeling, processing mapping and microstructure evolution of as-cast Ti-6Mo-4Al-4Zr-3Nb-2Cr-1Fe alloy during hot deformation in (α+β) region

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-20 DOI: 10.1016/j.intermet.2025.108637

Yili Li , Hongze Fang , Ruirun Chen , Shichen Sun , Baohui Zhu , Xiang Xue

To investigate the hot deformation behavior and the microstructure evolution of Ti644321 alloy in α+β region, the hot compression tests were conducted within the temperature range from 720 to 810 °C and strain rate from 0.001 to 1 s⁻¹. The as-cast Ti alloy mainly consists of coarse equiaxed β phases. During the thermal deformation of alloys in the (α+β) region, lots of α phase precipitates. At lower strain rates, the microstructure consists of fine spherical or short rod-shaped α phase embedded within the β matrix. This indicates that under thermal deformation conditions, the α phase undergoes spheroidization, which is caused by the wedging of β phase. At high strain rates, dynamic recrystallization is difficult to occur due to insufficient time consumption or sustained generation of dislocations. With the increase of deformation temperature, the number of primary α phases decreases, and the size also slightly increases. The relationship between microstructural characteristics and power dissipation efficiency (η) is established through the analysis of the hot processing map and corroborated by microstructural observations. Flow localizations and lamellar kinking of α phase appear in the instability region. The optimal processing parameters for Ti644321 alloy are in the medium temperature (740–770 °C) and the low strain rate (0.001–0.03 s⁻¹). The dynamic recovery of β phase and the spheroidization of α phase are the main softening mechanisms in this area.

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引用次数: 0

The strain rate effect on strength behavior of CoCrNi medium entropy alloy up to 106 s−1

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-18 DOI: 10.1016/j.intermet.2025.108665

Jinlei Dong , Xuemiao Chen , Xuping Zhang , Guiji Wang , Zhikai Fu , Zhihao Fang , Guan Wang , Binqiang Luo , Fuli Tan , Jianheng Zhao , Chengwei Sun

It is of great scientific significance and application value to reveal and understand the multi-scale mechanical properties and deformation mechanisms of medium entropy alloys (MEAs) under wide strain rates and high pressures. In this work, we systemically investigated the mechanical behaviors and underlying mechanisms of CoCrNi MEA and their connections under strain rates from 10⁻³ s⁻¹ to 10⁶ s⁻¹ and high pressures to about 22 GPa by experiments and simulations. The compression mechanical behaviors and microstructure characteristics were obtained by means of multiple loadings and characterization methods. As the strain rate increases, the experimental results showed two distinct dependences between yield strength and strain rates. Specifically, the strain rate sensitivity (SRS) of the yield strength transitions from 0.085 at low strain rates (1.0 × 10⁻³ s⁻¹-1.0 × 10⁻¹ s⁻¹) to 0.14 at high strain rates (2.6 × 10³ s⁻¹-1.48 × 10⁶ s⁻¹). Based on these, we utilized a crystal plasticity (CP) model and revealed that this transition of SRS is related to the mechanism transition from dislocation nucleation and slip at low strain rates to massive dislocation nucleation and drag at high strain rates. Our study provides a valuable framework for characterizing the dynamic mechanical behaviors of MEAs under a wider range of strain rates, guiding the design of MEAs with excellent dynamic mechanical properties.

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引用次数: 0

Effect of V addition on the microstructure and wear resistance of CoCrFeNiNb high-entropy alloy laser cladding layers 添加 V 对 CoCrFeNiNb 高熵合金激光熔覆层微观结构和耐磨性的影响

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-18 DOI: 10.1016/j.intermet.2025.108654

Chenxiao Song , Wei Zhao , Jinpeng Bi , Shuai Li , Hairui Gao , Hui Zhang , Song Gao , Yuexia Lv , Weifeng Rao

In this study, CoCrFeNiNbV_x (x = 0, 0.5, 1, 1.5) high-entropy alloy (HEA) laser cladding layers were fabricated to investigate the effects of V content on the microstructure evolution, as well as room-temperature and high-temperature wear resistance of the cladding layers. It was found that all cladding layers exhibited a typical hypereutectic morphology. With increasing x, the stability of the FCC phase decreased, gradually transitioning from FCC phase + Laves phase (primary Laves phase + secondary Laves phase) + NbC to BCC phase + Laves phase (primary Laves phase + secondary Laves phase). At x = 1, the primary Laves phase accounted for 41.6 % of the structure and exhibited optimal size uniformity. Compared to DT4 industrial pure iron, the microhardness of the cladding layers was significantly improved, which can be attributed to the combined effects of second-phase strengthening, solid solution strengthening and dispersion strengthening. As x increased, the microhardness, room-temperature wear resistance, and high-temperature wear resistance of the cladding layers initially increased and then decreased, reaching optimal values at x = 1, where they were 1.61, 7.04, and 7.40 times higher than those at x = 0, respectively. The improvement in room-temperature wear resistance can be attributed to the increased Laves phase content and the formation of Fe-, V-, and Nb-enriched oxide layers. The enhancement in high-temperature wear resistance is due to the increased Laves phase content and the lubricating effect of V_xO_y. The addition of V significantly improves the properties of high-entropy alloys and provides an effective approach for preparing cladding layers with good wear resistance and high-temperature wear resistance.

本研究制作了 CoCrFeNiNbVx（x = 0、0.5、1、1.5）高熵合金（HEA）激光熔覆层，以研究 V 含量对熔覆层微观结构演变以及室温和高温耐磨性的影响。结果发现，所有堆焊层都呈现出典型的过共晶形态。随着 x 值的增加，FCC 相的稳定性降低，逐渐从 FCC 相 + Laves 相（初级 Laves 相 + 次级 Laves 相）+ NbC 过渡到 BCC 相 + Laves 相（初级 Laves 相 + 次级 Laves 相）。在 x = 1 时，原生 Laves 相占结构的 41.6%，并表现出最佳的尺寸均匀性。与 DT4 工业纯铁相比，包覆层的显微硬度显著提高，这可归因于第二相强化、固溶强化和分散强化的共同作用。随着 x 值的增大，堆焊层的显微硬度、室温耐磨性和高温耐磨性先增大后减小，在 x = 1 时达到最佳值，分别是 x = 0 时的 1.61 倍、7.04 倍和 7.40 倍。室温耐磨性的提高可归因于 Laves 相含量的增加以及铁、钒和铌富集氧化层的形成。高温耐磨性的提高归因于 Laves 相含量的增加和 VxOy 的润滑作用。添加 V 能明显改善高熵合金的性能，并为制备具有良好耐磨性和高温耐磨性的堆焊层提供了有效方法。

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引用次数: 0

The effect of cellular reaction on mechanical behavior and microstructure evolution of β-solidified γ-TiAl based alloy during hot deformation 热变形过程中蜂窝反应对β固化γ-TiAl基合金力学行为和微观结构演变的影响

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-17 DOI: 10.1016/j.intermet.2025.108653

V.S. Sokolovsky , N.D. Stepanov , G.A. Salishchev

In this work, the effect of cellular reaction on the mechanical behavior and evolution of the microstructure of the Ti-43.2Al-1.9V-1.1Nb-1.0Zr-0.2Gd-0.2B (at.%) alloy during uniaxial compression at Т = 1050 °C, έ = 10⁻³ s⁻¹ and ɛ = 70 %. The lamellar (HT1) and metastable α₂-grain (HT2) initial structures were produced by heat treatment and used as starting materials. Heating to the deformation temperature of the HT1 condition has not resulted in any noticeable changes in the microstructure, while HT2 microstructure transforms to (α₂+γ) nanolamellar colonies alongside with development of a cellular reaction with the formation of coarse lamellar colonies. In the HT2 state, compared to HT1, the flow stresses are significantly reduced and the nature of the mechanical behavior changes. This behavior was associated with the localization of plastic flow in coarse lamellar colonies, and the development of recrystallization and spheroidization processes in them. By the final stage of deformation, the proportion of recrystallized/spheroidized structure increases in the HT2 state to 87 %, while in HT1 it is only 50 %. Mechanical behavior, structural evolution, and plastic deformation mechanisms are discussed.

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引用次数: 0

Microstructure and compressive mechanical properties of BCC structured (NbTi)100-x(CrAl)x medium-entropy alloys BCC 结构 (NbTi)100-x(CrAl)x 中熵合金的微观结构和压缩机械性能

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-16 DOI: 10.1016/j.intermet.2025.108651

Ji-Won Kim , Sang-Kyu Yoo , Dong-Hyun Lee , In-Chul Choi

To obtain a medium-entropy alloy (MEA) having a body-centered cubic (BCC) structure with relatively high specific strength and room-temperature fracture strain, a NbTiCrAl alloy is manufactured by the vacuum arc melting method. The NbTiCrAl alloy is developed by adding Ti to improve elongation and reduce weight, Al to enhance strength and reduce weight, and Cr to increase oxidation resistance. However, Al and Cr can form intermetallic compounds, which may reduce the mechanical properties of the alloy. To optimize strength and fracture strain, the contents of Al and Cr are varied. All the (NbTi)_100-x(CrAl)_x alloys, except those with more than 40 at.% Al and Cr, exhibit a BCC solid solution phase as a main phase. As the Al and Cr contents increase to 50 at.%, the short-range ordered B2 phase and the intermetallic compound Laves C14 phase are coexisted, as confirmed by microstructural analysis. The room temperature compression test results show that the yield strength improves without compromising fracture strain when the Cr and Al contents increase. However, when the total Cr and Al contents exceed 40 at.%, the short-range ordered B2 and Laves C14 phases coexist within the BCC matrix, resulting in catastrophic failure. Finally, in the (NbTi)_100-x(CrAl)_x alloys, (NbTi)₇₀(CrAl)₃₀ MEA exhibits the best properties in terms of specific yield strength and fracture strain.

{"title":"Microstructure and compressive mechanical properties of BCC structured (NbTi)100-x(CrAl)x medium-entropy alloys","authors":"Ji-Won Kim , Sang-Kyu Yoo , Dong-Hyun Lee , In-Chul Choi","doi":"10.1016/j.intermet.2025.108651","DOIUrl":"10.1016/j.intermet.2025.108651","url":null,"abstract":"<div><div>To obtain a medium-entropy alloy (MEA) having a body-centered cubic (BCC) structure with relatively high specific strength and room-temperature fracture strain, a NbTiCrAl alloy is manufactured by the vacuum arc melting method. The NbTiCrAl alloy is developed by adding Ti to improve elongation and reduce weight, Al to enhance strength and reduce weight, and Cr to increase oxidation resistance. However, Al and Cr can form intermetallic compounds, which may reduce the mechanical properties of the alloy. To optimize strength and fracture strain, the contents of Al and Cr are varied. All the (NbTi)<sub>100-x</sub>(CrAl)<sub>x</sub> alloys, except those with more than 40 at.% Al and Cr, exhibit a BCC solid solution phase as a main phase. As the Al and Cr contents increase to 50 at.%, the short-range ordered B2 phase and the intermetallic compound Laves C14 phase are coexisted, as confirmed by microstructural analysis. The room temperature compression test results show that the yield strength improves without compromising fracture strain when the Cr and Al contents increase. However, when the total Cr and Al contents exceed 40 at.%, the short-range ordered B2 and Laves C14 phases coexist within the BCC matrix, resulting in catastrophic failure. Finally, in the (NbTi)<sub>100-x</sub>(CrAl)<sub>x</sub> alloys, (NbTi)<sub>70</sub>(CrAl)<sub>30</sub> MEA exhibits the best properties in terms of specific yield strength and fracture strain.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"179 ","pages":"Article 108651"},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Balancing κ-formation and γ-recrystallization towards exceptional mechanical properties in a NiCoV0.9 medium entropy alloy

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-16 DOI: 10.1016/j.intermet.2025.108666

Yuxin Zhang , Junyang He , Weijin Cai , Na Li , Zipan Chen , Xiangqi Xu , Yang Chen , Zhixiang Qi , Gong Zheng , Daixiu Wei , Xinrong Tan , Min Song

In this work, by lowering the V amount, two thermodynamic processes, i.e., κ-formation and γ-recrystallization, are near-concurrently activated in a NiCoV0.9 medium entropy alloy (MEA) during 900 °C annealing. The NiCoV0.9 MEA with only 2 min annealing inherits the high strength from the cold-rolling structure while regains apparent work-hardening, endowing the alloy at this state with excellent strength-ductility synergy. By utilizing correlated observation methods, it is found that in the very beginning of annealing, γ-recrystallization occurs closely prior to κ transformation, which in turn enables elemental redistribution needed for κ growth. Further in-situ synchrotron high-energy X-ray diffraction reveals the synchronous onset of plastic deformation in both κ and γ, suggesting the good deformability of κ regardless of its hard nature. With prolonged annealing at 900 °C, the yield strength drops sharply yet the ductility is not further enhanced. This is likely due to the fast increment in both size and volume fraction of the κ phase that significantly raises the cracking sensitivity.

{"title":"Balancing κ-formation and γ-recrystallization towards exceptional mechanical properties in a NiCoV0.9 medium entropy alloy","authors":"Yuxin Zhang , Junyang He , Weijin Cai , Na Li , Zipan Chen , Xiangqi Xu , Yang Chen , Zhixiang Qi , Gong Zheng , Daixiu Wei , Xinrong Tan , Min Song","doi":"10.1016/j.intermet.2025.108666","DOIUrl":"10.1016/j.intermet.2025.108666","url":null,"abstract":"<div><div>In this work, by lowering the V amount, two thermodynamic processes, i.e., κ-formation and γ-recrystallization, are near-concurrently activated in a NiCoV0.9 medium entropy alloy (MEA) during 900 °C annealing. The NiCoV0.9 MEA with only 2 min annealing inherits the high strength from the cold-rolling structure while regains apparent work-hardening, endowing the alloy at this state with excellent strength-ductility synergy. By utilizing correlated observation methods, it is found that in the very beginning of annealing, γ-recrystallization occurs closely prior to κ transformation, which in turn enables elemental redistribution needed for κ growth. Further in-situ synchrotron high-energy X-ray diffraction reveals the synchronous onset of plastic deformation in both κ and γ, suggesting the good deformability of κ regardless of its hard nature. With prolonged annealing at 900 °C, the yield strength drops sharply yet the ductility is not further enhanced. This is likely due to the fast increment in both size and volume fraction of the κ phase that significantly raises the cracking sensitivity.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"179 ","pages":"Article 108666"},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel antioxidant strategy for refractory high-entropy alloys utilizing element diffusion along an ultrafine lamellar microstructure

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics

Pub Date : 2025-01-16 DOI: 10.1016/j.intermet.2025.108649

Bohang Shen , Ruixin Wang , Shun Li , Li'an Zhu , Yu Tang , Hong Luo , Shuxin Bai

High-temperature oxidation poses a significant challenge in applications such as aviation and turbines. While refractory high-entropy alloys maintain good strength at elevated temperatures, their resistance to high-temperature oxidation remains problematic. To explore an antioxidant strategy for refractory high-entropy alloys, the oxidation behaviour of Ti2ZrNbNi3 with an ultrafine body-centered cubic disordered and ordered solution (BCC + B2) lamellar microstructure was studied at different temperatures. When the oxidation temperature is greater than 800 °C, O atoms diffuse inwards along the boundaries of the ultrafine lamella and combine with Zr and Ti to generate low-valent oxides. With increasing time, high-valent oxides of Zr and Ti are generated, and Ni atoms originally belonging to the B2 phase can diffuse outwards and then form a dense NiO antioxidation layer. As the oxide rate of Ti2ZrNbNi3 is as low as that of pure Ni, the effectiveness of an antioxidation strategy utilizing elemental diffusion along an ultrafine lamellar microstructure has been demonstrated.

{"title":"A novel antioxidant strategy for refractory high-entropy alloys utilizing element diffusion along an ultrafine lamellar microstructure","authors":"Bohang Shen , Ruixin Wang , Shun Li , Li'an Zhu , Yu Tang , Hong Luo , Shuxin Bai","doi":"10.1016/j.intermet.2025.108649","DOIUrl":"10.1016/j.intermet.2025.108649","url":null,"abstract":"<div><div>High-temperature oxidation poses a significant challenge in applications such as aviation and turbines. While refractory high-entropy alloys maintain good strength at elevated temperatures, their resistance to high-temperature oxidation remains problematic. To explore an antioxidant strategy for refractory high-entropy alloys, the oxidation behaviour of Ti2ZrNbNi3 with an ultrafine body-centered cubic disordered and ordered solution (BCC + B2) lamellar microstructure was studied at different temperatures. When the oxidation temperature is greater than 800 °C, O atoms diffuse inwards along the boundaries of the ultrafine lamella and combine with Zr and Ti to generate low-valent oxides. With increasing time, high-valent oxides of Zr and Ti are generated, and Ni atoms originally belonging to the B2 phase can diffuse outwards and then form a dense NiO antioxidation layer. As the oxide rate of Ti2ZrNbNi3 is as low as that of pure Ni, the effectiveness of an antioxidation strategy utilizing elemental diffusion along an ultrafine lamellar microstructure has been demonstrated.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"179 ","pages":"Article 108649"},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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