Intermetallics最新文献_第7页

The microstructure, magnetic and mechanical properties of nanoheterogeneous (Fe0.5Co0.5)100-xCux alloys 纳米非均相（Fe0.5Co0.5）100-xCux合金的显微组织、磁性和力学性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-21 DOI: 10.1016/j.intermet.2025.108931

Jianjie Du , Ximing Jin , Qijia Yu , Boying Qiao , Jingmin Wang , Jinghua Liu , Chengbao Jiang

{"title":"The microstructure, magnetic and mechanical properties of nanoheterogeneous (Fe0.5Co0.5)100-xCux alloys","authors":"Jianjie Du , Ximing Jin , Qijia Yu , Boying Qiao , Jingmin Wang , Jinghua Liu , Chengbao Jiang","doi":"10.1016/j.intermet.2025.108931","DOIUrl":"10.1016/j.intermet.2025.108931","url":null,"abstract":"<div><div>FeCo alloys have attracted considerable interest due to the highest Curie temperature and magnetic induction intensity. However, there is rare investigations on nanoheterogeneous FeCo-based alloys. In this study, nanoheterogeneous (Fe0.5Co0.5)100-xCux (x = 0–5) alloys are systematically designed, and their microstructural characteristics, magnetic behaviors, and mechanical properties are comprehensively investigated. The introduction of Cu atoms induces a notable refinement in the average grain size, decreasing from 52.3 μm for x = 0 to 24.3 μm for x = 5, accompanied by a reduction in the long-range order parameter. Through detailed microstructural analysis, the solid-solution limit of Cu in the alloy is determined to be approximately 2 at.%. When x > 2, Cu-rich nanophases with either twinned or twin-free face-centered cubic (FCC) structure precipitate within the matrix. With increasing Cu content from x = 0 to x = 5, the saturation magnetization exhibits only a marginal decrease of 0.57 %, while the Curie temperature drops by 2.7 %. Meanwhile, the coercivity shows a slight upward trend. Significantly, the tensile fracture strength demonstrates a linear increase, rising from 153 MPa for the Cu-free alloy to 400 MPa for the x = 5 composition. The compressive yield strength is also substantially enhanced, increasing from 278 MPa (x = 0) to 791 MPa (x = 5). Furthermore, the underlying mechanisms linking microstructural evolutions to the observed changes in magnetic and mechanical properties are systematically discussed. This research provides a potential avenue for the development of high-performance FeCo-based magnetic materials by establishing nanoheterogeneous microstructure.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108931"},"PeriodicalIF":4.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679594","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}

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Enhancing corrosive wear resistance and antibacterial properties of Ti6Al4V by laser-clad coatings with CrMoNbWCux powder CrMoNbWCux粉末激光熔覆Ti6Al4V涂层提高其耐腐蚀磨损和抗菌性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-21 DOI: 10.1016/j.intermet.2025.108927

Xiulin Ji, Yayun Bao, Siwei Zhan, Fengtao Wang, Youbin Lai

{"title":"Enhancing corrosive wear resistance and antibacterial properties of Ti6Al4V by laser-clad coatings with CrMoNbWCux powder","authors":"Xiulin Ji, Yayun Bao, Siwei Zhan, Fengtao Wang, Youbin Lai","doi":"10.1016/j.intermet.2025.108927","DOIUrl":"10.1016/j.intermet.2025.108927","url":null,"abstract":"<div><div>Ti6Al4V alloy is widely used in the manufacture of artificial joint implants, but its service life is limited due to wear and corrosion. To enhance the corrosive wear resistance and antibacterial properties, a mixture of CrMoNbW alloy powders with copper additions was deposited on a Ti6Al4V substrate via laser cladding. A high laser power was employed to fully melt the tungsten-containing powder, resulting in significant dilution and the formation of Ti-rich refractory alloy coating. The addition of copper promotes an increase in the Laves phase, significantly increasing the coating's hardness—approximately six times higher than Ti6Al4V and twice that of CoCrMo. Furthermore, copper addition enhances the coating's corrosion resistance. Tribocorrosion tests conducted in 0.9 % NaCl solution at 37 ± 0.5 °C revealed that copper addition effectively reduces the friction coefficient and dramatically decreases the wear rate. Notably, CrMoNbW-10 %Cu coating exhibits a wear resistance ∼69 times higher than Ti6Al4V under 1 N load. Additionally, antibacterial tests against S. aureus demonstrated that incorporating 10 wt % copper enhances the antibacterial rate from ∼51 % to 88 %. Thus, the laser-clad CrMoNbW-10 %Cu coating demonstrates strong potential for titanium-based artificial joint implants, offering superior wear resistance, corrosion resistance, and antibacterial performance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108927"},"PeriodicalIF":4.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670437","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}

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Optimization of CuMnNiSnSi medium-entropy bronze alloys via solution-aging treatment: Tribological behavior under starved oil lubrication and dry sliding 通过固溶时效处理优化CuMnNiSnSi中熵青铜合金：缺油润滑和干滑动下的摩擦学行为

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-20 DOI: 10.1016/j.intermet.2025.108922

Wei Bai , Xiaoqing Jin , Aijun Zhang , Benbin Xin , Jiesheng Han , Junhu Meng

{"title":"Optimization of CuMnNiSnSi medium-entropy bronze alloys via solution-aging treatment: Tribological behavior under starved oil lubrication and dry sliding","authors":"Wei Bai , Xiaoqing Jin , Aijun Zhang , Benbin Xin , Jiesheng Han , Junhu Meng","doi":"10.1016/j.intermet.2025.108922","DOIUrl":"10.1016/j.intermet.2025.108922","url":null,"abstract":"<div><div>The (CuMnNiSn)100-xSix (x = 2, 4, and 6 in molar ratio) medium-entropy bronze alloys were subjected to solution-aging treatment to refine the microstructure and reduce compositional segregation. The effects of Si content and the solution-aging treatment on the microstructure and mechanical properties were systematically investigated. The tribological behavior of the treated CuMnNiSn)100-xSix alloys under starved oil lubrication and dry sliding conditions was analyzed. As the Si content increases to 4 at.%, the precipitation of rod-like (Mn,Ni)3Si intermetallic compound within the face-centered cubic (FCC) matrix gives rise to significant hardening in the alloy. The solution-aging treatment contributes to the alloy's ductility and fracture toughness by enhancing compositional homogeneity while reducing the content of brittle phases. As the Si content increased from 2 to 6 at.%, the wear rate of the treated alloys monotonically decreased from 5.22 × 10−7 to 1.28 × 10−7 mm3 N−1 m−1 under starved oil lubrication conditions and from 5.32 × 10−5 to 1.08 × 10−5 mm3 N−1 m−1 under dry sliding conditions. The treated (CuMnNiSn)94Si6 alloy exhibited a threefold improvement in wear resistance compared to the treated (CuMnNiSn)98Si2 alloy under starved oil lubrication conditions. This improvement further increased fourfold under dry sliding conditions, due to the formation of a locally-protective glaze layer (composed of SnO2 and SiO2) on the worn surface.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108922"},"PeriodicalIF":4.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665818","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}

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Microstructure evolution, work-hardening-dynamic softening transition and wear performance of a NiAl-based high-entropy alloy nial基高熵合金的组织演变、加工硬化-动态软化转变及磨损性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-20 DOI: 10.1016/j.intermet.2025.108930

Zhixin Xu, Xiaohong Wang, Ao Li, Yunting Su, Tengfei Ma

{"title":"Microstructure evolution, work-hardening-dynamic softening transition and wear performance of a NiAl-based high-entropy alloy","authors":"Zhixin Xu, Xiaohong Wang, Ao Li, Yunting Su, Tengfei Ma","doi":"10.1016/j.intermet.2025.108930","DOIUrl":"10.1016/j.intermet.2025.108930","url":null,"abstract":"<div><div>This study fabricated a NiAl-CoCrxZryFez high-entropy alloy (HEA) with a valence electron concentration (VEC) value of 7 via vacuum arc melting. The influence of Zr content on the alloy's microstructure, mechanical properties, and wear performance was systematically investigated. Microstructural analysis revealed that increasing Zr progressively enhanced the volume fraction of eutectic microstructure, while the phase composition evolved from a single BCC phase to a dual-phase FCC + BCC structure. The Ni30Al28Co15Zr7Fe20 alloy exhibited exceptional resistance to high-temperature softening, achieving yield strengths of 1316 MPa at 600 °C, 960 MPa at 800 °C, and 300 MPa at 1000 °C. However, thermal stability assessments indicated that eutectic secondary phases in both Ni30Al28Co15Cr5Zr5Fe17 and Ni30Al28Co15Zr7Fe20 alloys became unstable at 1000 °C, exhibiting a tendency for phase ablation. Furthermore, Zr addition broadened the temperature window for the transition from work-hardening to dynamic softening during deformation by approximately 200 °C. High-temperature tribological tests (600–800 °C) revealed a transition in the dominant wear mechanisms from abrasive to adhesive wear with increasing temperature. The Ni30Al28Co15Zr7Fe20 alloy exhibited superior wear resistance at 800 °C, achieving the lowest wear rate of 8.92 × 10−6 (mm3/N·m). This enhancement is attributed to Zr-induced solid solution strengthening, which improved hardness and effectively mitigated delamination wear mechanisms, thereby maintaining excellent high-temperature wear resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108930"},"PeriodicalIF":4.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665819","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}

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Microstructure, mechanical properties, and corrosion resistance of biomedical Ti-Zn alloys prepared by spark plasma sintering 火花等离子烧结生物医用Ti-Zn合金的显微组织、力学性能和耐蚀性

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-20 DOI: 10.1016/j.intermet.2025.108926

Y.T. Chen , J.L. Xu , J. Huang , J.M. Luo , L. Lian , Y.F. Zheng

{"title":"Microstructure, mechanical properties, and corrosion resistance of biomedical Ti-Zn alloys prepared by spark plasma sintering","authors":"Y.T. Chen , J.L. Xu , J. Huang , J.M. Luo , L. Lian , Y.F. Zheng","doi":"10.1016/j.intermet.2025.108926","DOIUrl":"10.1016/j.intermet.2025.108926","url":null,"abstract":"<div><div>Dense Ti-Zn alloys with high strength and low elastic modulus were prepared by spark plasma sintering (SPS) for biomedical applications. The effect of Zn contents (5–20 wt%) on the microstructure, mechanical properties, wear resistance, and corrosion resistance of the Ti-Zn alloys were systematically investigated. The results show that the Ti-Zn alloys are mainly composed of α-Ti and Ti2Zn phases with small amounts of β-Ti phase, and the quantity and size of the Ti2Zn phase increase with increasing the Zn contents. The Ti2Zn and α-Ti forms typical pearlite structures. Solid solution strengthening of Zn and the second phase strengthening of the Ti2Zn result in a significant increase in mechanical strength, microhardness, and wear resistance of the Ti-Zn alloys. The Ti-Zn alloys exhibit peak values for both yield strength and microhardness when the Zn content is 15 wt%. Meanwhile, as the Zn content rises, the compressive strength progressively increases, whereas the fracture strain gradually diminishes. The fracture mechanism changes from the tough-brittle mixed fracture to the quasi-cleavage fracture and then to the cleavage fracture. The compressive elastic modulus of the Ti-Zn alloys ranges from 20 to 30 GPa, very close to that of the human bone. The wear resistance of the Ti-Zn alloys steadily enhances as the Zn content increases, and the wear mechanism changes from abrasive wear to adhesive wear and oxidative wear. Specifically, the wear rate of the Ti-20Zn shows an 86.7 % enhancement compared to pure titanium. The Ti-Zn alloys demonstrate a strong passivation capability in SBF solution, exhibiting outstanding corrosion resistance, while the increase of the Zn content has a certain negative effect on the corrosion resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108926"},"PeriodicalIF":4.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665817","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}

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Effects of selective laser melting process parameters on the fatigue strength and material characteristics of tungsten carbide/inconel 718 composites 选择性激光熔化工艺参数对碳化钨/铬镍铁合金718复合材料疲劳强度和材料特性的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-19 DOI: 10.1016/j.intermet.2025.108928

Haichuan Shi , Yang Chu , Peilei Zhang , Zhishui Yu , Hua Yan , Qinghua Lu

{"title":"Effects of selective laser melting process parameters on the fatigue strength and material characteristics of tungsten carbide/inconel 718 composites","authors":"Haichuan Shi , Yang Chu , Peilei Zhang , Zhishui Yu , Hua Yan , Qinghua Lu","doi":"10.1016/j.intermet.2025.108928","DOIUrl":"10.1016/j.intermet.2025.108928","url":null,"abstract":"<div><div>Tungsten Carbide (WC)-reinforced Inconel 718 (IN718) composites were prepared by Selective Laser Melting (SLM) technique. The impact of SLM production on WC/IN718 composites was studied to analyze densities, microstructure evolution, tensile properties, and fatigue properties under various process parameters. The effect of parameters on composite densities and powder melting was analyzed by a combination of experimental and simulation methods. In the matrix, the WC particles are dispersed uniformly, and there is a reaction between the WC particles and the matrix to form a good interfacial reaction layer. As the laser energy density increases, the surface of the WC particles melts under high energy density laser irradiation, leading to the diffusion of decomposed W and C atoms into the matrix. Two typical carbides, W2C and (M, W)C (M for Ni, Cr, Nb, Fe), form sequentially at a distance from the WC grains. At a laser energy density of 89.94 J/mm3, the tensile strength and microhardness of the composites reach the maximum values of 1203 MPa and 403 HV. This is a composite strengthening mechanism resulting from the WC and carbide strengthening phases. The incorporation of WC particles significantly improves the fatigue resistance of the composites compared to IN718. Fatigue fracture is in the form of quasi-dissociation fracture, with fatigue originating from pores and incompletely fused defects on the surface. The fatigue extension zone is characterized by riverine and fatigue streaks. This study offers a theoretical foundation and guidance on enhancing the mechanical properties of nickel-based superalloys and broadening their potential applications in the future.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108928"},"PeriodicalIF":4.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665798","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}

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Microstructure and mechanical properties of a novel lightweight eutectic high-entropy alloy 一种新型轻质共晶高熵合金的组织与力学性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-19 DOI: 10.1016/j.intermet.2025.108925

Dongdong Xia , Xicong Ye , Jiankun Yang , Huijun Kang , Li Sun , Guoxin Wu , Jiajia Guo , Yiren Rong , Fanghui Zhu

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Effect of sintering temperature and late PCA addition on the microstructure and mechanical behavior of a heterogeneous-multiscale AlCoCuMnNi high-entropy alloy synthesized via mechanical alloying and spark plasma sintering 烧结温度和后期PCA添加对机械合金化和火花等离子烧结制备的非均质多尺度AlCoCuMnNi高熵合金的组织和力学行为的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-19 DOI: 10.1016/j.intermet.2025.108920

Soroosh Mohammadi , Farshad Akhlaghi , Jae-Hyung Cho

{"title":"Effect of sintering temperature and late PCA addition on the microstructure and mechanical behavior of a heterogeneous-multiscale AlCoCuMnNi high-entropy alloy synthesized via mechanical alloying and spark plasma sintering","authors":"Soroosh Mohammadi , Farshad Akhlaghi , Jae-Hyung Cho","doi":"10.1016/j.intermet.2025.108920","DOIUrl":"10.1016/j.intermet.2025.108920","url":null,"abstract":"<div><div>With high-entropy alloys (HEAs) surpassing traditional alloys in nearly every characterization aspect, the search for novel high-potential compositions has become increasingly important. AlCoCuMnNi is a newly designed HEA, developed based on literature review, theoretical calculations, and the mutual interactions of its constituent elements in similar HEAs. This alloy is processed using mechanical alloying and spark plasma sintering (SPS) to produce an ultra-fine-grained, heterogeneous microstructure. To optimize the processing route, samples with different powder stock conditions subjected to various sintering temperatures (900, 1000 and 1100 °C) and examined. The results demonstrated a significant influence of input parameters on the final microstructure and mechanical properties. Modifying powder morphology through late PCA addition or increasing sintering temperature led to a substantial rise in hardness (from 390 to 625 HV), while a moderate sintering temperature yielded an unprecedented balance between shear strength of 300 MPa and high hardness as 440 HV. The obtained mechanical properties were further justified using advanced characterization techniques, such as EBSD analysis. The microstructure of the processed alloys revealed a heterogeneous bimodal duplex FCC + BCC phase, contributing to varying mechanical responses within the same composition. This study not only introduces a new HEA with an optimal balance between hardness and shear strength but also highlights its adaptability. The alloy's ability to be tailored through different processing routes makes it a promising candidate for further optimization and potential applications in various industrial sectors.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108920"},"PeriodicalIF":4.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662191","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

Fcc TiFeCoNi-based medium and high-entropy alloys: corrosion and antibacterial behavior Fcc tifeconi基中高熵合金：腐蚀和抗菌行为

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-18 DOI: 10.1016/j.intermet.2025.108906

Farid Gharibi Asl, Milad Gashti, Rouhollah Mehdinavaz Aghdam, Ali Nourozi, Reza Soltani, Fatemehsadat Pishbin

{"title":"Fcc TiFeCoNi-based medium and high-entropy alloys: corrosion and antibacterial behavior","authors":"Farid Gharibi Asl, Milad Gashti, Rouhollah Mehdinavaz Aghdam, Ali Nourozi, Reza Soltani, Fatemehsadat Pishbin","doi":"10.1016/j.intermet.2025.108906","DOIUrl":"10.1016/j.intermet.2025.108906","url":null,"abstract":"<div><div>A quasi-equiatomic Ti25Fe25Co25Ni25 medium entropy alloy (MEA) and a Ti20Fe20Co20Ni20Cu20 high entropy alloy (HEA) were synthesized via mechanical alloying (MA) and spark plasma sintering (SPS). During the MA process, a single-phase FCC solid solution was detected. Following the SPS method, a dual-phasic structure consisting of FCC and Ti-rich intermetallic (C14-Laves) compounds was formed. An investigation was conducted to examine the role of Cu on the microstructural, corrosion, and antibacterial features of the TiFeCoNi alloy. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests were employed for electrochemical investigation. The study revealed that the corrosion current density for MEA and HEA samples was documented as 4.30 × 10−6 A/cm2 and 5.88 × 10−6 A/cm2, respectively. The MEA sample exhibited a reduction of ∼16 % in capacitor double layer capacity and a rise of ∼216 % in charge transfer resistance, indicating its superior corrosion resistance compared to the HEA sample. Both samples experienced a combination of galvanic and pitting corrosion mechanisms. The antibacterial efficacy against S. aureus and E. coli demonstrated that the HEA sample exhibits superior antibacterial characteristics compared to the MEA sample, attributed to the release of Cu2+ ions. The inhibition zone diameters for the HEA sample against E. coli and S. aureus were measured to be 7.46 mm and 14.60 mm, respectively. In contrast, no inhibition zone was observed for the MEA sample against either bacterial strain.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108906"},"PeriodicalIF":4.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657212","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

Effects of Al2O3 on the microstructure and mechanical properties of the lightweight refractory medium entropy alloy coatings Al2O3对轻质耐火介质熵合金涂层组织和力学性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-17 DOI: 10.1016/j.intermet.2025.108918

C.Y. Cui, L. Feng, X.F. Liu, H.H. Xu, J. Yang, X.G. Cui

{"title":"Effects of Al2O3 on the microstructure and mechanical properties of the lightweight refractory medium entropy alloy coatings","authors":"C.Y. Cui, L. Feng, X.F. Liu, H.H. Xu, J. Yang, X.G. Cui","doi":"10.1016/j.intermet.2025.108918","DOIUrl":"10.1016/j.intermet.2025.108918","url":null,"abstract":"<div><div>Ti1.5NbMo0.5(Al2O3)x (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) lightweight refractory medium entropy alloy (RMEA) coatings were fabricated on 316 L stainless steel substrates using prefabricated powder laser cladding. The microstructure of the coatings primarily consisted of BCC and Laves phases. Al2O3-free coating showed high microhardness (1137.5 HV), 5.7 times that of the substrate, but exhibited increased brittleness. Adding Al2O3 refined the grains, promoted interdendritic phase formation, and improved toughness and molding quality. After annealing at 900 °C, the microhardness of the Ti1.5NbMo0.5(Al2O3)0.6 coating showed only a 2.07 % reduction, indicating superior high-temperature stability. The wear resistance of the coatings improved significantly, with the lowest friction coefficient observed in the Ti1.5NbMo0.5(Al2O3)0.6 coating (0.491) before annealing, and a further reduction of 33.71 % after annealing. The wear mechanism was attributed to the formation of oxide layers, reducing direct contact between the friction pair and the coating.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108918"},"PeriodicalIF":4.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657213","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