Intermetallics最新文献

{"title":"FeCr-based bulk metallic glasses with enhanced wear and corrosion resistance","authors":"Jiawei Zhang ,&nbsp;Chen Su ,&nbsp;Limin Cai ,&nbsp;Ya-nan Chen ,&nbsp;Yifan Ruan ,&nbsp;Shengfeng Guo","doi":"10.1016/j.intermet.2025.108909","DOIUrl":"10.1016/j.intermet.2025.108909","url":null,"abstract":"<div><div>Seawater contains a high concentration of Cl⁻ ions, and prolonged exposure can lead to severe corrosion and wear of ship hulls, thereby increasing maintenance and operational costs. In this work, we developed a series of FeCr-based bulk metallic glasses with Cr content exceeding 30 at.%. Notably, when the Cr content reaches 30 at.%, the alloy exhibits excellent comprehensive performance, including a high glass transition temperature of 904 K and a hardness of 1429 HV. These enhancements are attributed to the increased contents of Cr-C and Cr-B bonds. Among the compositions studied, the Fe₃₇Cr₃₀W₁₀C_13.5B_7.5Y₂ alloy exhibits superior wear resistance, with a wear rate as low as 6.33 × 10⁻⁶ mm³ N⁻¹ m⁻¹. However, further increasing the Cr content to 37 at.% results in a higher wear rate of 9.17 × 10⁻⁶ mm³ N⁻¹ m⁻¹. This might be due to the reduction in indentation toughness, which increases the brittleness and promotes fatigue wear. Moreover, the Fe₃₇Cr₃₀W₁₀C_13.5B_7.5Y₂ alloy shows good corrosion resistance in a 3.5 wt% NaCl solution, with a low self-corrosion current density of 2.25 × 10⁻⁶ A/cm². Nevertheless, excessive Cr content destabilizes the passivation layer, leading to premature pitting corrosion. This degradation arises from a sharp decrease in the Cr³⁺/Cr⁶⁺ ratio during passivation and an increase in cation vacancies, which together reduce the corrosion resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108909"},"PeriodicalIF":4.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633584","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}

{"title":"In-situ formation and regulation of Ti2AlC particles with low aspect ratio and their influence mechanisms on microstructure and mechanical properties in Ti-46Al-8Nb-1.5Cr-xC alloy","authors":"Hongze Fang ,&nbsp;Liao Mi ,&nbsp;Jiangshan Liang ,&nbsp;Xin Ding ,&nbsp;Xianfei Ding ,&nbsp;Bobo Li ,&nbsp;Ruirun Chen","doi":"10.1016/j.intermet.2025.108917","DOIUrl":"10.1016/j.intermet.2025.108917","url":null,"abstract":"<div><div>To obtain a high volume fraction of Ti₂AlC particles with a low aspect ratio and to elucidate their formation mechanism, Ti-46Al-8Nb-1.5Cr-<em>x</em>C alloys were fabricated using vacuum arc melting. A systematic investigation was conducted on the lamellar colony size, Ti₂AlC particle content and morphology evolution, phase constituents, and mechanical properties, along with a discussion of the corresponding mechanisms. The results show that as the carbon content increases from 0.5 to 3.0 at.%, the B2 phase gradually decreases and eventually disappears, while the average lamellar colony size is refined from 97 to 39 μm. Simultaneously, the morphology of Ti₂AlC particles changes from initially elongated shapes to equiaxed shapes forms, with the aspect ratio decreasing from 9.33 to 3.28. The proportion of low-aspect-ratio Ti₂AlC particles increases from 4.1 to 77.8 %. The formed Ti₂AlC particles not only act as heterogeneous nucleation sites for the β phase but also impede the growth of the α phase, thereby providing the basis for lamellar colony refinement. The increased number of TiC particles, combined with the reduced surface energy difference between the (0001) basal plane and other crystallographic planes, jointly inhibited the growth of Ti₂AlC particles. In terms of mechanical properties, the compressive strength increases from 1491 to 2299 MPa, and the strain improves from 17.66 to 34.48 %. The enhancement in strength is mainly attributed to lamellar colony refinement and precipitation strengthening by Ti₂AlC particles. Moreover, the reduction of the B2 phase and the crack-arresting effect of Ti₂AlC particles contribute to the improved toughness of the alloy.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108917"},"PeriodicalIF":4.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623635","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}

{"title":"Investigation of alumina reinforcement effects on microstructure, hardness, and tribological behavior of AlCoCrFeNi high entropy alloy","authors":"M. Ghanbariha ,&nbsp;M. Ketabchi ,&nbsp;M. Farvizi","doi":"10.1016/j.intermet.2025.108915","DOIUrl":"10.1016/j.intermet.2025.108915","url":null,"abstract":"<div><div>This study examines the effect of alumina (Al₂O₃) reinforcement on the microstructure, hardness, and wear behavior of AlCoCrFeNi high-entropy alloy (HEA). Al₂O₃ particles (0–15 wt%) were incorporated into the HEA matrix using mechanical alloying (MA) and the prepared powder mixtures were consolidated by spark plasma sintering (SPS) method. The microstructural examination showed that the base alloy displayed a dual-phase structure comprising BCC and FCC phases, with alumina addition stabilizing the BCC phase at higher concentrations (15 wt%). Microhardness tests indicated that the incorporation of up to 10 wt% Al₂O₃ had minimal impact on hardness, whereas 15 wt% Al₂O₃ significantly increased it from approximately 600 HV to 999 HV. Tribological investigations demonstrated that the wear resistance improved with increasing alumina content and HEA-15 wt% Al₂O₃ composite exhibited the lowest wear width (1892 μm) and the best wear performance. The primary wear mechanisms consisted of abrasion, delamination, adhesion, and oxidation. These findings highlight the potential of alumina-reinforced HEAs for applications requiring enhanced mechanical strength and wear resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108915"},"PeriodicalIF":4.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623634","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}

{"title":"A designed FeCoNiCuTiV high-entropy filler metal toward achieving superior interfacial bonding Ti2AlNb alloy","authors":"Jingkuan Wang ,&nbsp;Zhiwei Qin ,&nbsp;Peng Li ,&nbsp;Zhijie Ding ,&nbsp;Peng Zhao ,&nbsp;Bin Wang ,&nbsp;Xiong Ma ,&nbsp;Huawei Sun ,&nbsp;Yafang Cheng ,&nbsp;Yunfeng Chang ,&nbsp;Honggang Dong","doi":"10.1016/j.intermet.2025.108916","DOIUrl":"10.1016/j.intermet.2025.108916","url":null,"abstract":"<div><div>As a critical material of next-generation aircraft, joining Ti₂AlNb alloy has emerged as a key in demanding structural applications. Herein, a novel FeCoNiCuTiV high-entropy filler metal was designed for vacuum brazing of Ti₂AlNb alloy, inhibiting the formation of continuous brittle intermetallic compounds (IMCs) due to the role of high mixing entropy. Typical interfacial microstructure of the brazed joint was Ti₂AlNb/B2 + (Ti, Nb)₃Al/Ti₂AlNb phase dissolved with Fe, Co, Ni and Cu + Ti₃Al + (Ti, Nb)₃Al + Nb₂Al + Ti-rich IMC/B2 + (Ti, Nb)₃Al/Ti₂AlNb. The dissolution of the Ti₂AlNb alloy induced the formation of the Nb₂Al phase at the interface under excessive brazing temperature, leading to the destruction of the high-entropy system of the filler metal. Elevated brazing temperature promoted the uniformity of the brazing seam microstructure and eliminated the residual brazing zone. The maximum strength of 235.9 MPa was reached at 1150 °C for 10 min. Nanoindentation and fracture path revealed that the diffusion zone was the weak zone of the joint and that the formation of (Ti, Nb)₃Al phase perpendicular to the interface contributed to the strength of the joint. The fracture mode of the joint was a brittle fracture with cleavage fracture characteristics. This work shed light on opening up a wider field of high-entropy alloys as filler metals, which also provided references for accelerating the practical applications of the Ti₂AlNb alloy.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108916"},"PeriodicalIF":4.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604614","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}

{"title":"Machine learning for hot deformation flow stress prediction and dynamic recrystallization in Fe24.75Ni19.8Co9.9Cr14.85Al10.9Mn14.85Si4.95 high-entropy alloy","authors":"Yiwen Hu ,&nbsp;Haoyu Zhang ,&nbsp;Jun Cheng ,&nbsp;Ge Zhou ,&nbsp;Ximin Zang ,&nbsp;Chuan Wang ,&nbsp;Jie Yang ,&nbsp;Lijia Chen","doi":"10.1016/j.intermet.2025.108914","DOIUrl":"10.1016/j.intermet.2025.108914","url":null,"abstract":"<div><div>In this study, a machine learning model based on a traditional support vector machine (BKA-SVR), optimized by the Black Kite Algorithm, was established for the first time and used to predict the flow stress value. Compared to the traditional SCAT constitutive model, the BKA-SVR model provides a more accurate flow stress prediction. The mean square correlation coefficient is 0.99799, the average absolute error is 5.4826, and the average absolute relative error is 12.02 %. In the context of small sample predictions, the BKA-SVR model still demonstrates high accuracy in flow stress prediction: R² is 0.99527, MAE is 6.0667, and MAPE is 12.76 %. According to the hot processing map that utilizes different stability criteria, the prediction based on Murty's instability criterion is found to be more applicable. Through a coupled analysis of energy dissipation and the instability criterion, the optimal hot working process was determined to be at a deformation temperature of 1100 °C and a strain rate of 0.001 s⁻¹. Under this process parameter, the energy dissipation efficiency (<em>η</em>) is approximately 56 %, and there is no risk of instability. Additionally, a microscopic analysis of different regions with varying <em>η</em> values reveals that as the <em>η</em> value increases, the degree of dynamic recrystallization (DDRX) gradually increases.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108914"},"PeriodicalIF":4.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604615","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}

{"title":"Electron beam welding of as-cast AlCoCrFeNi2.1 and GH4169: microstructural evolution and mechanical performances of dissimilar joints","authors":"Shuai Li ,&nbsp;Fengyi Zhang ,&nbsp;Xiaotong Hou ,&nbsp;Peng He ,&nbsp;Jinoop Arackal Narayanan ,&nbsp;Xingxing Wang ,&nbsp;Weimin Long","doi":"10.1016/j.intermet.2025.108912","DOIUrl":"10.1016/j.intermet.2025.108912","url":null,"abstract":"<div><div>Sound electron beam welded joints were successfully fabricated between as-cast AlCoCrFeNi_2.1 eutectic high-entropy alloy and GH4169 superalloy. A systematic investigation was subsequently conducted into the influence of beam current (<em>I</em>_<em>b</em>) and welding speed (<em>v</em>) on the microstructure evolution and mechanical properties of the AlCoCrFeNi_2.1/GH4169 dissimilar electron beam joints. The optimal mechanical performance was achieved with an ultimate tensile strength of 878.3 MPa and a fracture strain of 27.4 %, under welding parameters of a 24 mA beam current, 12 mm/s welding speed, and a heat input of 114.0 J/mm. In joints with low heat input (Q &lt; 114.0 J/mm), defects such as lack of penetration and incomplete fusion were exhibited, leading to a reduction in load-bearing capacity. Conversely, an excessively high heat input (Q &gt; 114.0 J/mm) has been shown to triggers over-precipitation of brittle Laves phase in the fusion zone, thereby reducing the joint strength. The mean grain size in the fusion zone exhibited an increase from 32.8 μm to 38.1 μm in conjunction with an escalation in the applied heat input. The AlCoCrFeNi_2.1 eutectic high-entropy alloy demonstrated the highest degree of hardness (∼307HV), exceeding both the fusion zone (260-289HV) and the GH4169 zone (∼225HV).</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108912"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596354","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}

{"title":"Crystallization behavior of a high-iron-content Fe85.5B13P0.5C0.2Cu0.8 amorphous alloy","authors":"Runfeng Xue ,&nbsp;Xuesong Li ,&nbsp;Ang Xiao ,&nbsp;Haiyang Bai ,&nbsp;Weihua Wang ,&nbsp;Mingwei Chen","doi":"10.1016/j.intermet.2025.108910","DOIUrl":"10.1016/j.intermet.2025.108910","url":null,"abstract":"<div><div>High saturation magnetization (<em>B</em>_s) of soft magnetic materials is essential for the miniaturization of electronic devices. For Fe-based amorphous-nanocrystalline soft magnetic materials, higher <em>B</em>_<em>s</em> requires higher iron contents. However, the iron content is restricted by glass forming ability and the optimization of the amorphous-nanocrystalline structure. In this study we report the formation of the amorphous-nanocrystalline structure in a high iron content alloy (Fe_86-xB_12.5+xP_0.5C_0.2Cu_0.8 (x = 0.5, 1, 1.5 at. %) by a single-roller melt spinning and facile heat treatment. Based on the X-ray diffraction (XRD) and differential scanning calorimeter (DSC), the amorphous Fe_85.5B₁₃P_0.5C_0.2Cu_0.8 alloy has a large crystallization temperature range of Δ<em>T</em> = 76 K, and the crystallization process of amorphous matrix → amorphous matrix + α-Fe phase → α-Fe + Fe₃C + Fe₃B phase takes place in sequence during the continuous heating. The large separation between the primary crystallization with the formation of α-Fe and the secondary crystallization leads to the easy optimization of the amorphous-nanocrystalline soft magnetic microstructure. As a result, the optimized dual amorphous-nanocrystalline structure shows an ultrahigh <em>B</em>_<em>s</em> of 1.8 T.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108910"},"PeriodicalIF":4.3,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588015","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}

{"title":"Mechanochemical synthesis of Ni3Al nano-alloy","authors":"M. Mohammadi,&nbsp;S.A. Kahani","doi":"10.1016/j.intermet.2025.108905","DOIUrl":"10.1016/j.intermet.2025.108905","url":null,"abstract":"<div><div>The nickel aluminide nanoalloy was synthesized by chemical reduction of nickel(II) chloride hexahydrate salt by aluminum nanoparticles under basic (S1) and acidic (S2) conditions in the solid-state reaction. Aluminum nanoparticles were prepared by a novel wire drawing method in the presence of lubricating oil. Analysis of products (S1) and (S2) show that the prepared samples have different fraction component of compounds, morphologies, particle size and magnetic properties. The products were characterized by IR, XRD, FESEM, and VSM. The absorption bands do not appear in FTIR spectra of products (S1) and (S2) while, the spectra of precursors show all the absorption bands of nickel(II) chloride hexahydrate salt. The X-ray diffraction pattern results show the presence of three phases unreacted aluminum, metallic nickel and Ni₃Al nano-alloy in products. The weight fraction of Ni₃Al nanoparticles is calculated by the Rietveld method. Quantitative XRD analysis of (S1) shows a weight fraction of 33.90 % Ni₃Al, 61.19 % metallic nickel and unreacted aluminum 4.90 % also, calculation in (S2) shows weight fraction Ni₃Al, metallic nickel and unreacted aluminum 19.75, 77.83 and 2.42 % respectively. FESEM image of S1 and S2 show particles size distribution in the region 11–17 nm and 40–150 nm respectively. The hysteresis loop of S1 and S2 show magnetic saturation 7. 90 emu/g and 17.04 emu/g respectively.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108905"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579955","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}

{"title":"Characterization of residual stress and its effect on mechanical properties of nickel–based single crystal superalloys by nanoindentation","authors":"Xinkuo Ji ,&nbsp;Chenfei Song ,&nbsp;Gesheng Xiao ,&nbsp;Huanhuan Lu ,&nbsp;Zhidan Zhou","doi":"10.1016/j.intermet.2025.108911","DOIUrl":"10.1016/j.intermet.2025.108911","url":null,"abstract":"<div><div>Different indenters are used to measure the magnitude of residual compressive stress and characterize the influence of compressive residual stress on the mechanical response of nickel–based single crystal superalloy. Based on the reduced modulus obtained by a cylindrical flat punch indenter, the indentation hardness and actual projected contact area of the pyramidal indenter at loading segment are calculated, which avoid the effect of indentation sinking–in or piling–up. Furthermore, according to the Nix–Gao model and actual projected contact area, the indentation load–depth curves of the pyramidal indenter at loading segment can be reconstructed, which are not affected by the indentation size effect. Based on the corrected indentation load–depth curves, the magnitude of residual compressive stress is calculated according to the difference in the loading work of the pyramidal indenter, and verified by the calculation results of David's model. It is found that the elastic modulus and reduced modulus are not affected by the residual compressive stress; the indentation hardness, slope of the contact stiffness – depth curve and contact area show an increasing regime as residual compressive stress increases; residual compressive stress enhances the ability of NBSX to resist creep and plastic deformation.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108911"},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571156","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}

{"title":"Near room temperature magnetocaloric effect in Co: LaFe13−xSix ribbons through melt Spinning: Boosting δTFWHM and Curie temperature","authors":"Anjana Vinod ,&nbsp;D. Arvindha Babu ,&nbsp;W. Madhuri","doi":"10.1016/j.intermet.2025.108896","DOIUrl":"10.1016/j.intermet.2025.108896","url":null,"abstract":"<div><div>We report the development of high-performance cobalt-doped lanthanum iron silicon (<em>La-Fe-Co-Si</em>) alloys, synthesized via rapid solidification and short annealing, exhibiting optimal magnetic properties for magnetic refrigeration applications. The structural and microstructural analysis reveals a predominant cubic <span><math><mrow><mi>N</mi><mi>a</mi><msub><mrow><mi>Z</mi><mi>n</mi></mrow><mn>13</mn></msub></mrow></math></span>-type phase, corresponding to <span><math><mrow><mi>L</mi><mi>a</mi><msub><mrow><mo>(</mo><mrow><mi>F</mi><mi>e</mi><mo>,</mo><mi>S</mi><mi>i</mi></mrow><mo>)</mo></mrow><mn>13</mn></msub></mrow></math></span>, a material paradigmatic of superior magnetocaloric performance, thereby underscoring its potential for efficacious room-temperature magnetic refrigeration. However, Magnetization studies demonstrate a monotonic increase in Curie transition temperature with Co content, tunable to room temperature. The alloys exhibit a significant change in entropy <span><math><mrow><mo>(</mo><mo>−</mo><mo>Δ</mo><msub><mi>S</mi><mi>M</mi></msub></mrow></math></span>),2.70–3.99 <span><math><mrow><mfrac><mi>J</mi><mrow><mi>k</mi><mi>g</mi><mo>.</mo><mi>K</mi></mrow></mfrac></mrow></math></span> at 2.5 <em>T</em>, with a wide half-height width (39–45 <em>K</em>) and notable relative cooling power (108–156 <span><math><mrow><mfrac><mi>J</mi><mrow><mi>k</mi><mi>g</mi></mrow></mfrac></mrow></math></span>). Critical exponent analysis confirms a second-order phase transition. Our findings demonstrate the feasibility of producing Co-doped <span><math><mrow><mi>L</mi><mi>a</mi><msub><mrow><mo>(</mo><mrow><mi>F</mi><mi>e</mi><mo>,</mo><mi>S</mi><mi>i</mi></mrow><mo>)</mo></mrow><mn>13</mn></msub></mrow></math></span> alloys with near-room-temperature transition and large <span><math><mrow><mo>−</mo><mo>Δ</mo><msub><mi>S</mi><mi>M</mi></msub></mrow></math></span> through alloy design and melt-spinning processing, offering promising candidates for magnetic refrigeration applications.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108896"},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571155","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}