Intermetallics最新文献_第3页

Electrodeposition and properties of Ni-Co-W-(Mo-Cu) high/medium entropy alloy coatings deposited from an aqueous bath

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-18 DOI: 10.1016/j.intermet.2025.108744

D. Ahmadkhaniha , D. Ascani , M. Fedel , C. Zanella

{"title":"Electrodeposition and properties of Ni-Co-W-(Mo-Cu) high/medium entropy alloy coatings deposited from an aqueous bath","authors":"D. Ahmadkhaniha , D. Ascani , M. Fedel , C. Zanella","doi":"10.1016/j.intermet.2025.108744","DOIUrl":"10.1016/j.intermet.2025.108744","url":null,"abstract":"<div><div>This study aimed to deposit multi-elemental coatings, including Ni-Co-Mo-W, Ni-Co-Cu-W and Ni-Co-Cu-Mo-W, with different configurational entropy from an aqueous bath by direct current electrodeposition. For this purpose, the effect of current density on the elemental composition was studied, and it was shown that the induced deposition of W was mainly controlled by Co, while the induced deposition of Mo was affected by both Ni and Co. In addition, Ni showed an activation deposition mechanism, while Mo suffered from concentration polarization for a prolonged electrodeposition process. All elements deposited homogeneously through the coatings' thickness except Cu showed some segregation. However, XRD spectra proved to have an amorphous structure for all coatings. Upon heat treatment, the crystallization of the coatings occurs, which results in an increase in hardness values from 5.6 to 11 GPa by increasing the heat treatment temperature up to 800 °C in the case of Ni-Co-Mo-W coating. The maximum hardness values were achieved at 500 °C in other coatings, and then a slight decrease was observed. Polarization results of the as-deposited coatings showed the potential for passivation of these coatings. However, due to the defects in the coatings, they were not completely protective towards the substrate. The results suggest that the presence of Cu had the main impact on the coating's properties since it decreased Co deposition, the hardness and the thermal stability of the coatings.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108744"},"PeriodicalIF":4.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of microstructural characteristics, phase transformation and wear behavior of Ni50.8Ti49.2 shape memory alloy fabricated by LPBF versus conventional casting

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-17 DOI: 10.1016/j.intermet.2025.108694

Zhenze Liu , Lunxiang Li , Yong Li , Liangtian Tang , Chunling Mao , Hu Xiao , Kongyuan Yang , Panpan Li , Ping Liang , Zhenglei Yu

{"title":"Comparison of microstructural characteristics, phase transformation and wear behavior of Ni50.8Ti49.2 shape memory alloy fabricated by LPBF versus conventional casting","authors":"Zhenze Liu , Lunxiang Li , Yong Li , Liangtian Tang , Chunling Mao , Hu Xiao , Kongyuan Yang , Panpan Li , Ping Liang , Zhenglei Yu","doi":"10.1016/j.intermet.2025.108694","DOIUrl":"10.1016/j.intermet.2025.108694","url":null,"abstract":"<div><div>This study investigates the microstructural, phase transformation behavior, mechanical, and wear resistance of Ni<sub>50.8</sub>Ti<sub>49.2</sub> shape memory alloys (SMAs) produced through Laser-Powder Bed Fusion (LPBF) techniques compared to conventional casting. It was found that LPBF-NiTi alloy exhibited a reduced grain size and a notably increased phase transformation temperature, accompanied by a latent heat of transformation that is twice as high as that observed in NiTi ingots. LPBF-NiTi alloy exhibits better corrosion resistance and superior wear compared to NiTi ingots. The wear volume of LPBF-NiTi samples was quantitatively assessed to be 27.7 % inferior to that of NiTi ingot. The repeated thermal cycling during LPBF causes Ni evaporation in NiTi phase, reducing critical stress for martensitic transformation. LPBF-NiTi sample is highly susceptible to martensitic transformation under the same contact load. Moreover, smaller <em>grain sizes,</em> a higher relative density of dislocations, and the lattice distortions and strain fields induced by Ti<sub>4</sub>Ni<sub>2</sub>O<sub>x</sub> precipitates significantly enhance the strength of LPBF-NiTi samples. This research offers theoretical insights for the practical application of LPBF-NiTi alloy in manufacturing wear-resistant components with complex geometries for engineering purposes.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108694"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636864","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

The tribocorrosion behavior of the Cu-based glassy composite coating produced via high velocity air-fuel thermal spraying

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-17 DOI: 10.1016/j.intermet.2025.108747

You Yu , Yuping Wu , Shuaishuai Zhu , Sheng Hong , Jiangbo Cheng , Junpeng Lv , Yuchuan Huang

{"title":"The tribocorrosion behavior of the Cu-based glassy composite coating produced via high velocity air-fuel thermal spraying","authors":"You Yu , Yuping Wu , Shuaishuai Zhu , Sheng Hong , Jiangbo Cheng , Junpeng Lv , Yuchuan Huang","doi":"10.1016/j.intermet.2025.108747","DOIUrl":"10.1016/j.intermet.2025.108747","url":null,"abstract":"<div><div>3Cr13 stainless steel (SS), commonly applied to marine engineering components such as bearings and drive shafts, is damaged by tribocorrosion. For improving the resistance of tribocorrosion, the Cu<sub>55</sub>Zr<sub>25</sub>Ti<sub>15</sub>Ni<sub>5</sub> glassy composite coating is prepared via high-velocity air-fuel (HVAF) spraying technology on 3Cr13 SS, and the tribocorrosion experiment of the coating is investigated using friction and wear tester. The coating exhibits a multiphase structure, comprising amorphous-nanocrystalline region and oxide phase consisting of TiO<sub>2</sub> and t-ZrO<sub>2</sub>, of which the amorphous-nanocrystalline phase accounts for about 53 %. The nanomechanical properties and the corrosion properties are investigated. The analysis of the tribocorrosion system (counter-balls, post-tribocorrosion solution, and wear tracks) is carried out using 3D scanner, inductively coupled plasma mass spectrometer (ICP-MS) and scanning electron microscope (SEM). Abrasive wear and fatigue wear mainly occur in the coating during tribocorrosion, and adhesive wear and chemical reaction wear are slight. As the load increases, tribo-film is formed on the surface of the coating and the wear rate decreases dramatically, due to the suppression of abrasive wear. The wear rate of the coating is only half of that of 3Cr13 SS at the load of 30N.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108747"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642893","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

Unveiling deformation behavior of selective laser melted Al-doped CoCrNi medium entropy alloys

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-17 DOI: 10.1016/j.intermet.2025.108737

Zhengtong Zhang , Jian Tu , Yu Shu , Yuting Feng , Yanxiang Liang , Yuchen Dou , Yingkun Qiu , Yanbin Du

引用次数: 0

Overcoming strength-ductility trade-off of Mg2Si via Al and O doping: First-principles and experimental investigations

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-17 DOI: 10.1016/j.intermet.2025.108739

Jinchuan Wen , Zhangxi Wu , Ming Li , Dahong Zhao , Yuanchun Huang , Yu Liu

{"title":"Overcoming strength-ductility trade-off of Mg2Si via Al and O doping: First-principles and experimental investigations","authors":"Jinchuan Wen , Zhangxi Wu , Ming Li , Dahong Zhao , Yuanchun Huang , Yu Liu","doi":"10.1016/j.intermet.2025.108739","DOIUrl":"10.1016/j.intermet.2025.108739","url":null,"abstract":"<div><div>The intrinsic brittleness of Mg<sub>2</sub>Si severely deteriorates the mechanical properties of composites and limits their potential application as reinforcing particles. This work puts forward a cost-efficient approach to address this challenge by doping Al/O into Mg<sub>2</sub>Si to improve the deformation coordination of Al-Mg<sub>2</sub>Si composites. First-principles calculations revealed that Al doping alone reduced the modulus and hardness of Mg<sub>2</sub>Si and increased its Poisson's ratio, but Al-doped Mg<sub>2</sub>Si still exhibited brittle characteristics. O doping alone or Al/O co-doping further reduced the modulus and hardness of compounds, and realized the transformation of Mg<sub>2</sub>Si from brittle to plastic. Additionally, the anisotropy of doped Mg<sub>2</sub>Si was slightly increased, but Al/O co-doping suppressed the anisotropy to a certain extent compared to doping alone. The underlying mechanism is that Al doping enhanced the metallicity of the compounds, and Al/O co-doping significantly weakened the strength of Mg-Si and Si-Si covalent bonds, and formed new O-Mg and O-Si ionic bonds. Subsequently, nano-indentation experiments were carried out to test the Young's modulus and hardness of samples with different doping elements. The results, in descending order, were as follows: Al<sub>8</sub>Si<sub>4</sub>, Al<sub>8</sub>Si<sub>4</sub>Al, Al<sub>8</sub>Si<sub>4</sub>O, Al<sub>8</sub>Si<sub>4</sub>AlO, which aligned consistently with the theoretical calculations. The Young's modulus and hardness of Mg<sub>8</sub>Si<sub>4</sub>AlO were 72.9 GPa and 198 HV, respectively, which were approximately 48.4 % and 32.4 % lower than those of undoped Mg<sub>2</sub>Si. This work provides valuable insights and guidance for designing novel high-strength and high-toughness composites by doping modified reinforced particles.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108739"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636860","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

Comparative investigation on microstructural and magnetic properties of Ce- and LaCe-based magnets by grain boundary diffusion with PrGaCu alloy

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-16 DOI: 10.1016/j.intermet.2025.108733

Q.W. Zhu, Y.H. Hou, F.T. Ni, Y.Q. Xu, X.W. Liu, W. Li, J.M. Luo, Y.L. Huang

{"title":"Comparative investigation on microstructural and magnetic properties of Ce- and LaCe-based magnets by grain boundary diffusion with PrGaCu alloy","authors":"Q.W. Zhu, Y.H. Hou, F.T. Ni, Y.Q. Xu, X.W. Liu, W. Li, J.M. Luo, Y.L. Huang","doi":"10.1016/j.intermet.2025.108733","DOIUrl":"10.1016/j.intermet.2025.108733","url":null,"abstract":"<div><div>Grain boundary diffusion (GBD) has been proven to be an effective method for improving the coercivity of sintered Nd-Fe-B magnets, however, the matrix composition is also an important factor influencing the improvement of coercivity, which has not been thoroughly investigated. In this work, a comparative investigation is conducted on different dual main phase (DMP) sintered magnets by grain boundary diffusion with Pr<sub>70</sub>Ga<sub>15</sub>Cu<sub>15</sub> alloy. After GBD, the coercivity of La14 magnet increases from 3.9 kOe to 12.0 kOe, much higher than that of La0 magnet and more than three times that of initial magnet, with the same decrease in remanence. The SEM and EPMA results show that a Pr-rich shell around main phase grain and smooth intergranular phase has formed in both magnets, thereby contributing to the improvement of coercivity. However, for La0 magnet, a large number of diffusion sources accumulate on the surface of the magnet, accompanied by abnormal grain growth, which prevents the diffusion source from entering the magnet, resulting in lower coercivity. The different effects of diffusion source on microstructure and magnetic properties of two types of magnets in this study can provide practical guidance for future research.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108733"},"PeriodicalIF":4.3,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629184","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

Optimizing strength and minimizing anisotropy in Fe-Cr-Al-Nb alloys via Fe2Nb particles 通过 Fe2Nb 粒子优化 Fe-Cr-Al-Nb 合金的强度并最小化各向异性

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-15 DOI: 10.1016/j.intermet.2025.108741

Mingyu Fan , Ye Cui , Xue Cao , Wenqing Jiang , Naimeng Liu , Yang Zhang , Yanzhuo Xue , Xun-Li Wang , Zhongwu Zhang

{"title":"Optimizing strength and minimizing anisotropy in Fe-Cr-Al-Nb alloys via Fe2Nb particles","authors":"Mingyu Fan , Ye Cui , Xue Cao , Wenqing Jiang , Naimeng Liu , Yang Zhang , Yanzhuo Xue , Xun-Li Wang , Zhongwu Zhang","doi":"10.1016/j.intermet.2025.108741","DOIUrl":"10.1016/j.intermet.2025.108741","url":null,"abstract":"<div><div>Controlling the texture and grain size of Fe-Cr-Al alloys is essential for enhancing mechanical properties. Here, the effect of Nb on the texture evolution and the anisotropy of mechanical properties in Fe-Cr-Al alloys were investigated. Compared to the annealed Fe-Cr-Al alloy, the yield strength of the annealed Fe-Cr-Al-Nb alloy increased from 430 MPa to 540 MPa with nearly identical rolling and transverse tensile yield strengths. Transmission electron microscope results indicate that the Nb could form Fe<sub>2</sub>Nb particles with an average radius of 50 nm in matrix of the annealed Fe-Cr-Al-Nb alloy. The electron backscatter diffraction results indicate that the grains of the Fe-Cr-Al-Nb alloy are significantly refined by Fe<sub>2</sub>Nb particles, and the α-fiber and γ-fiber textures are weakened, promoting texture randomization. The strengthening calculations indicate that compared to annealed Fe-Cr-Al alloys, the increase in the yield strength of the annealed Fe-Cr-Al-Nb alloy is attributed, in sequence, to dislocation strengthening, Orowan strengthening by particles and grain boundary strengthening. As a result, the annealed Fe-Cr-Al-Nb alloy achieves an increase in yield strength while reducing anisotropy. This finding provides insights for the development of Fe-Cr-Al alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108741"},"PeriodicalIF":4.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628416","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

Influence of the Ti:Al:Cr proportion on the structure and oxidation resistance of ternary intermetallic coatings produced by non-vacuum electron beam cladding

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-15 DOI: 10.1016/j.intermet.2025.108745

D.V. Lazurenko , A.A. Ruktuev , Yu N. Malyutina , G.D. Dovzhenko , L. Song , N.S. Aleksandrova , E.A. Lozhkina , E.V. Domarov , A.V. Ukhina

{"title":"Influence of the Ti:Al:Cr proportion on the structure and oxidation resistance of ternary intermetallic coatings produced by non-vacuum electron beam cladding","authors":"D.V. Lazurenko , A.A. Ruktuev , Yu N. Malyutina , G.D. Dovzhenko , L. Song , N.S. Aleksandrova , E.A. Lozhkina , E.V. Domarov , A.V. Ukhina","doi":"10.1016/j.intermet.2025.108745","DOIUrl":"10.1016/j.intermet.2025.108745","url":null,"abstract":"<div><div>Titanium is known to be a material with poor oxidation resistance. When heated, it reacts with atmospheric gases, leading to the formation of the TiO<sub>2</sub> oxide film on its surface. This film does not protect the material against further oxidation. To solve this problem, heat-resistant coatings, including TiAl-based ones, are applied to titanium. This study investigates ternary Ti-Al-Cr surface layers with different concentrations of components. The protective layers were fabricated on titanium substrates by non-vacuum electron beam cladding. This method provides the formation of thick coatings (up to 2 mm in a single pass of the electron beam); however, the structure of the cladding layers can be significantly inhomogeneous. To reveal the influence of microstructural features of the coatings and the uneven elemental distribution on their oxidation behavior, detailed structural studies combined with the CALPHAD method were performed both before and after oxidation testing. It was found that an Al-rich alloy consisting primarily of the γ-phase provided the best protection against oxidation. The introduction of high concentrations of both Al and Cr yielded contradictory results. Although the L1<sub>2</sub>-and C14-phases formed in the coating are predicted to contribute to the development of a protective Al<sub>2</sub>O<sub>3</sub> film, the oxidation resistance of this cladding layer was comparable to that of titanium. This result can be attributed to the inhomogeneity of the coating and the appearance of the B2-phase in local areas of the coating at oxidation temperature and the decomposition of the Cr-depleted C14-phase. Furthermore, the Cr-rich B2-phase provides better oxidation resistance than the α<sub>2</sub>-phase of Al-lean cladding layers.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108745"},"PeriodicalIF":4.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628415","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

Annealing-induced softening and metamagnetictransition control in MnFePSi microwires

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-14 DOI: 10.1016/j.intermet.2025.108742

Mohamed Salaheldeen , Valentina Zhukova , James Rosero , Daniel Salazar , Arcady Zhukov

{"title":"Annealing-induced softening and metamagnetictransition control in MnFePSi microwires","authors":"Mohamed Salaheldeen , Valentina Zhukova , James Rosero , Daniel Salazar , Arcady Zhukov","doi":"10.1016/j.intermet.2025.108742","DOIUrl":"10.1016/j.intermet.2025.108742","url":null,"abstract":"<div><div>The effect of high-temperature annealing on the magnetic, morphological, and microstructural properties of MnFePSi glass-coated microwires (GCMWs) and bulk sample is studied. A comparative analysis is conducted to elucidate the direct influence of annealing at 1373 K on their physical characteristics. Notably, significant differences in magneto-structural behavior are observed between as-prepared GCMWs and the bulk alloy. For the bulk sample, annealing promotes homogenization and a decrease in the average grain size from 24 μm to 2 μm, as confirmed by SEM and XRD analyses. In contrast, a broader grain size distribution in MnFePSi GCMWs, ranging from 0.8 μm to 40 nm compared to the as-prepared sample's with relatively uniform size of 36 nm is induced by annealing. Additionally, annealing enhances the Fe<sub>2</sub>P phase content in both samples. The annealing process significantly affects magnetic properties of MnFePSi GCMWs. A notable reduction in coercivity (<em>H</em><sub><em>c</em></sub>) is observed, with a decrease in <em>H</em><sub><em>c</em></sub> from 761 Oe (as-prepared) to <em>H</em><sub><em>c</em></sub> = 46 Oe (annealed), as evaluated from the hysteresis (M − H) loop measured at <em>T</em> = 5 K. The as-prepared MnFePSi-GCMWs exhibit a unique metamagnetic phase transition in M − H loops measured at various temperatures (200 K–5 K). Conversely, the annealed GCMWs display a more uniform metamagnetic transition in M − H loops measured at <em>T</em> = 20 K and 5 K. Furthermore, as-prepared GCMWs exhibit multistep magnetic M − H loops below 100 K, which is absent in the annealed samples. This study underlines the substantial effect of the annealing on MnFePSi-GCMWs, enabling the tailoring of magnetic phenomena, such as metamagnetic phase transition, multistep magnetic behavior, and the control of magnetic response (hardening/softening). These tailored properties can be exploited in a wide range of applications based on glass-coated microwires.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108742"},"PeriodicalIF":4.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621096","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

Development and characterization of CoCrFeNi high entropy alloy composites reinforced by B4C ceramic particles

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-03-14 DOI: 10.1016/j.intermet.2025.108740

Aoxiang Li, Kaiwen Kang, Borui Zhang, Jinshan Zhang, Di Huang, Mingkun Xu, Saike Liu, Yiteng Jiang, Gong Li

{"title":"Development and characterization of CoCrFeNi high entropy alloy composites reinforced by B4C ceramic particles","authors":"Aoxiang Li, Kaiwen Kang, Borui Zhang, Jinshan Zhang, Di Huang, Mingkun Xu, Saike Liu, Yiteng Jiang, Gong Li","doi":"10.1016/j.intermet.2025.108740","DOIUrl":"10.1016/j.intermet.2025.108740","url":null,"abstract":"<div><div>To address the challenge of the low yield strength of single-phase FCC high-entropy alloys (HEAs), developing high-performance HEA composites has emerged as a promising strategy for enhancing the mechanical properties of HEAs. In this study, we propose a novel CoCrFeNi-based HEA composites incorporating a small amount of B<sub>4</sub>C ceramic particles. The influence of varying B<sub>4</sub>C ceramic particle content on the microstructure evolution and mechanical properties of CoCrFeNi(B<sub>4</sub>C)<sub>x</sub> HEAs was systematically investigated. Microstructure analysis reveals that increasing the B<sub>4</sub>C ceramic particles promoted the precipitation of M<sub>7</sub>C<sub>3</sub> carbides at grain boundaries, resulting in a dendritic microstructure. Mechanical testing demonstrated a significant improvement in yield strength and Vickers hardness, attributed to the synergistic strengthening of solution and precipitation strengthening. Furthermore, the microhardness of the M<sub>7</sub>C<sub>3</sub> carbides increased from 12.1 GPa to 15.5 GPa with higher B<sub>4</sub>C ceramic particle content, highlighting the contribution of these carbides to the overall hardness of the composite. This design strategy exploits the synergy between the metal matrix and ceramic reinforcements, improving mechanical performance and offering new possibilities for the development of advanced materials for demanding industrial applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"181 ","pages":"Article 108740"},"PeriodicalIF":4.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621095","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