International Journal of Refractory Metals & Hard Materials最新文献

{"title":"High-temperature passivation mechanism for recycling of refractory metals from Inconel 718 via sulfurization methods","authors":"Shuai Wang ,&nbsp;Fenglong Sun ,&nbsp;Xuheng Liu ,&nbsp;Xingyu Chen ,&nbsp;Jiangtao Li ,&nbsp;Lihua He ,&nbsp;Zhongwei Zhao","doi":"10.1016/j.ijrmhm.2025.107370","DOIUrl":"10.1016/j.ijrmhm.2025.107370","url":null,"abstract":"<div><div>Nickel-based superalloys contain substantial amounts of refractory metals such as Cr, Nb, and Mo. Recovering these refractory elements is a critical approach to promoting resource utilization and ensuring the secure supply of strategic metals. Among the various methods, the sulfurization corrosion technique offers distinct advantages for the recovery of nickel-based superalloys. However, research on the high-temperature sulfurization corrosion behavior of nickel-based superalloys remains limited. To realize the recovery of Inconel 718 alloys at lower temperatures, this study systematically investigated the hot sulfurization corrosion behavior of Inconel 718 alloys in low-melting-point metal sulfides. The findings revealed that the optimal recovery temperature of Inconel 718 via high-grade nickel matte is around 900 °C, accompanied by significant morphological changes due to the aggressive penetration and erosion by sulfides. Upon increasing the temperature to 1000 °C, the superalloy demonstrated a distinct passivation effect, which became progressively more pronounced with rising temperatures, resulting in a marked decrease in the corrosion rate. Further analysis indicated that the formation of Ni₃Fe during the hot sulfurization corrosion process is the primary factor responsible for the observed decline in corrosion rate. As the temperature increased, the growth rate of Ni₃Fe grains accelerated due to Ostwald ripening, leading to the development of a continuous Ni₃Fe layer, which inhibited the inward penetration and erosion of metal sulfides. In the sulfurization corrosion process, the conversion of refractory metals into low-melting-point sulfide phases enhances the extractability of refractory metals in the Inconel 718 alloys during the subsequent hydrometallurgical recovery process.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107370"},"PeriodicalIF":4.6,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810340","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":"Integrated thermokinetics and thermomechanics dependent pathways for evolution of cracks in laser additively fabricated tungsten","authors":"Rohit Randhavan ,&nbsp;Krishna Kamlesh Verma ,&nbsp;K.V. Mani Krishna ,&nbsp;Shashank Sharma ,&nbsp;Narendra B. Dahotre","doi":"10.1016/j.ijrmhm.2025.107366","DOIUrl":"10.1016/j.ijrmhm.2025.107366","url":null,"abstract":"<div><div>Cracking remains a critical challenge in the Laser Powder Bed Fusion (LPBF) of Tungsten (W) due to its inherent brittleness and the extreme thermal gradients involved in the process. While prior research has explored thermomechanical modeling and experimental observation of cracking in LPBF-processed W, a comprehensive correlation between track-by-track crack evolution and the underlying thermokinetic and thermomechanical phenomena is lacking. This study bridges this gap by integrating thermomechanical simulations with detailed microstructural examinations to systematically characterize crack morphology and behavior in multiscale (single- and multi-track) LPBF experiments. Samples were fabricated using input laser fluences of 10 J/mm², 15 J/mm², and 22.5 J/mm² to evaluate the influence of the process parameters (power, beam diameter, and scanning speed) on crack formation. Microstructural analysis revealed input laser fluence-dependent crack densities and morphologies. Samples produced at 10 J/mm² exhibited extensive cracking (60–65 mm/mm² for single-track, 10–12 mm/mm² for multi-track) with transverse cracks and a dense microcrack network. Increasing input laser fluence to 15 J/mm² reduced microcrack density, while input laser fluence of 22.5 J/mm² resulted in a shift to a single longitudinal crack (14–16 mm/mm² for single-track, 3–4 mm/mm² for multi-track), similar to welding-induced cracks. Track-by-track analysis of thermokinetic and thermomechanical evolution during multiscale LPBF processing coupled with crack evolution is discussed for these varying process parameters. This integrated approach provides a unique physics-based understanding of crack evolution mechanisms in LPBF-processed W, highlighting the critical role of input laser fluence in managing thermal stresses, dictating crack morphology, and offering a pathway for optimized process control.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107366"},"PeriodicalIF":4.6,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828223","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":"Optimization of hot press sintering parameters for basalt fiber reinforced impregnated-diamond drill bit matrix composite materials using response surface method","authors":"Qingquan Zhou,&nbsp;Yinlong Ma,&nbsp;Jie Ren","doi":"10.1016/j.ijrmhm.2025.107365","DOIUrl":"10.1016/j.ijrmhm.2025.107365","url":null,"abstract":"<div><div>To improve the bending strength of diamond drill bit matrix prepared by hot-press sintering, the bending strength of the sintered samples was used as the response variable. The effects of factors such as insulation time, pressure holding time, temperature, pressure, basalt fiber (BF) content, and diamond concentration were investigated. Significant factors affecting bending strength were screened using a Plackett-Burman design. The steepest ascent method and Box-Behnken response surface methodology were employed to optimize the hot-press sintering process, 32 sets of tire block samples were sintered. The results showed that insulation time and BF content were significant factors influencing the bending strength. After response surface optimization, the optimal hot-press sintering parameters were determined as follows: insulation time of 5 min, pressure holding time of 5 min, temperature of 960 °C, pressure of 15 MPa, diamond concentration of 20 vol%, and BF content of 0.586 %. Under these conditions, the bending strength of the samples reached 377.8 MPa, with experimental values closely matching the predicted values. The experimental results provide theoretical guidance and technical support for optimizing the hot-press sintering parameters.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107365"},"PeriodicalIF":4.6,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903936","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":"Selective partitioning of tungsten (VI) and molybdenum (VI) through the immobilization of Cyanex272 on resin","authors":"Xiaoqiang Wen ,&nbsp;Fengzhen Li ,&nbsp;Qiusheng Zhou ,&nbsp;Zhifeng Zhang ,&nbsp;Zhongqi Li","doi":"10.1016/j.ijrmhm.2025.107362","DOIUrl":"10.1016/j.ijrmhm.2025.107362","url":null,"abstract":"<div><div>The separation of tungsten (W) and molybdenum (Mo) from ammonium tungstate solutions poses a significant challenge in hydrometallurgy due to their nearly identical chemical properties. This study synthesized a novel Cyanex272-immobilized styrene-divinylbenzene (St-DVB) resin to achieve selective partitioning of W and Mo through an extractive chromatography approach. Systematic investigations under static and dynamic conditions identify pH 2.0 as optimal for maximizing Mo adsorption. Thermodynamic analysis revealed an entropy-driven endothermic adsorption mechanism, where elevated temperature enhances Mo selectivity while maintaining favorable kinetics. FTIR, XPS analysis demonstrated the coordination of MoO₂²⁺ with the phosphinic acid groups (–PO(O⁻)) in Cyanex272. Adsorption isotherms aligned with the Langmuir model, indicating that monolayer chemisorption is dominated by ligand-metal coordination. Kinetic analysis revealed pseudo-second-order behavior, with external mass transfer and intraparticle diffusion as sequential rate-limiting steps. Ammonia solution (2.0 mol·L⁻¹) achieved &gt;99.9 % desorption efficiency, enabling resin regeneration and closed-loop resource recovery. Column adsorption demonstrated exceptional performance, removing 99.88 % Mo from industrial-grade feed (100 g·L⁻¹ W, 0.5 g·L⁻¹ Mo) while maintaining effluent Mo below 0.6 mg·L⁻¹, with a separation factor (<em>β</em>_Mo/W) of 9.63 × 10⁵. The purified solution met stringent standards for high-purity ammonium paratungstate (APT) production. By synergizing solvent extraction selectivity with ion-exchange practicality, this method offers an industrially scalable and environmentally sustainable solution to the persistent W<img>Mo separation challenge, with potential applications in advanced material manufacturing.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107362"},"PeriodicalIF":4.6,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144866298","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":"Unveiling tensile creep mechanisms of W-Re-HfC alloys at elevated temperatures","authors":"Shuai Ma ,&nbsp;Di Dong ,&nbsp;Ye Gao ,&nbsp;Zhuangzhi Wu ,&nbsp;Dezhi Wang","doi":"10.1016/j.ijrmhm.2025.107358","DOIUrl":"10.1016/j.ijrmhm.2025.107358","url":null,"abstract":"<div><div>This study systematically investigates the tensile creep properties and failure mechanisms of the W-Re-HfC (tungsten‑rhenium-HfC) alloy under near service temperatures of 1600–2000 °C with stresses of 40–80 MPa. Results show the corresponding stress exponent varies from 2.56 to 4.04, while the creep activation energy ranges from 372.4 to 569.5 kJ·mol⁻¹. Besides, the Larson-Miller parameter model demonstrates excellent predictive capability for creep life. The dominant creep mechanism shifts from the diffusion-controlled creep at 1600 °C to the dislocation-dominated type at 1800 °C. Microstructural analysis reveals interactions between creep deformation and recrystallization that influence the creep mechanism. And HfC particles effectively inhibit dislocation motion and grain boundary sliding, enhancing creep resistance. Slip bands collisions with grain boundaries play a role in dislocation creep failure. This work provides essential theoretical insights and data support for the engineering design of W-Re-HfC alloys in aerospace, nuclear energy, and semiconductor industries.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107358"},"PeriodicalIF":4.6,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780992","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":"Enhanced mechanical properties and thermal stability of boron doped molybdenum alloy","authors":"Qinghao Yang ,&nbsp;Xingjiang Hua ,&nbsp;Chaofan Quan ,&nbsp;Hua Wang ,&nbsp;Li Wang ,&nbsp;Hairui Xing ,&nbsp;Junzhou Yang ,&nbsp;Qiang Wang ,&nbsp;Ping Hu ,&nbsp;Kuaishe Wang","doi":"10.1016/j.ijrmhm.2025.107354","DOIUrl":"10.1016/j.ijrmhm.2025.107354","url":null,"abstract":"<div><div>Molybdenum alloys with different boron-doping contents (0.0 %, 0.5 %, 1.0 %, and 10.0 %) were fabricated using powder metallurgy. The thermal stability and mechanical properties of molybdenum alloys doped with 1.0 % boron (Mo-1.0B) were studied at various annealing temperatures at 900 °C, 1000 °C, 1100 °C, and 1200 °C. The results show that trace boron doping enhances the densification of the structure. The porosities of sintered Mo-0.5B and Mo-1.0B specimens are 2.46 % and 1.75 %, respectively. The sintered fractures of Mo-0.5B and Mo-1.0B exhibit a mixture of intergranular and transgranular characteristics, whereas the porosity of sintered Mo-10.0B specimens reaches 27.58 %. The sintered fracture morphology of Mo-10.0B exhibits brittle transgranular characteristics. As the annealing temperature increases, Mo-1.0B undergoes partial recrystallization, transitioning from fragmented strip-like grains (2.72 μm at 900 °C) to approximately equiaxed grains (7.12 μm at 1200 °C). Dislocation density and entanglement are significantly reduced. Mo-1.0B exhibits a significant improvement in plasticity after high-temperature annealing. As the annealing temperature increases, the tensile strength of Mo-1.0B decreases from 791.4 MPa to 540 MPa, while its elongation improves from 21.4 % to 66.2 %, resulting in an ultimate strength–plasticity product exceeding 23 GPa·%. By analyzing the contributions of different strengthening mechanisms in Mo-1.0B at various annealing temperatures, it is determined that at 900 °C, strengthening is primarily governed by dislocation and grain boundary strengthening, whereas at 1000 °C, 1100 °C, and 1200 °C, grain boundary and solution strengthening dominate.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107354"},"PeriodicalIF":4.6,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766531","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":"Tantalum addition for dynamic-performance enhancement: achieving superior adiabatic shear response in novel tungsten heavy alloys","authors":"Zhenjie Xia,&nbsp;Jiatao Zhou,&nbsp;Yufeng Huang,&nbsp;Yunzhu Ma,&nbsp;Wensheng Liu","doi":"10.1016/j.ijrmhm.2025.107361","DOIUrl":"10.1016/j.ijrmhm.2025.107361","url":null,"abstract":"<div><div>Conventional tungsten heavy alloy (WHA) armor-piercing projectiles exhibit a mushrooming effect during penetration that compromises their armor-piercing capability. Enhancing adiabatic shear sensitivity promotes self-sharpening behavior in WHA projectiles, thereby improving penetration performance. In this study, a novel 90 W(2Ta)-Ni-Fe-Cu alloy consisting of refined tungsten particles and γ phase was used. We characterized the quasi-static and dynamic compressive mechanical properties using a universal compression tester and a Hopkinson Pressure Bar (SHPB) device. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the microstructural evolution mechanism. The yield strength of the alloy increases from 917 MPa at 10⁻³ s⁻¹ to 1735 MPa at 6000 s⁻¹. Under dynamic deformation at a strain rate of 6000 s⁻¹, uniform deformation occurs in the alloy at 20 % deformation amount, adiabatic shear localization initiates at 40 % deformation amount, and adiabatic shear fracture takes place at 60 % deformation amount. The solid solution of Ta increases the compressive strength of tungsten alloys. The fine grain strengthening by Ta addition results in lower SHR and SRS, leading to higher adiabatic shear sensitivity in tungsten alloys.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107361"},"PeriodicalIF":4.6,"publicationDate":"2025-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763975","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":"Ductilisation of tungsten using rolling and rhenium alloying","authors":"Matthew J. Lloyd ,&nbsp;Íris Carneiro ,&nbsp;Jóhan P. Magnussen ,&nbsp;Muhammad Naeem ,&nbsp;Robert Heymer ,&nbsp;Edward Alborghetti ,&nbsp;Ben Pyles ,&nbsp;Gary A. Rozak ,&nbsp;David M. Collins ,&nbsp;Alexander J. Knowles","doi":"10.1016/j.ijrmhm.2025.107352","DOIUrl":"10.1016/j.ijrmhm.2025.107352","url":null,"abstract":"<div><div>The brittleness of W at low temperatures remains a major challenge for its application in load-bearing components. To address this problem, two strategies were explored in this study: (1) the application of plastic deformation via rolling and (2) alloying with the ductilising element, Rhenium (Re). To study the combined effects of thermo-mechanical processing and alloying, sheets of W and W-25Re (wt.%) were prepared using powder metallurgy and rolling. Average grain sizes of 0.4 μm and 0.6 μm were measured perpendicular to the rolling direction, for the W and W-25Re sheets respectively. Additionally, the W-25Re sheet was annealed at 1650 °C to form large, recrystallised grains that would typically be associated with brittle behaviour in unalloyed W. Characterisation of the as-rolled materials revealed highly textured microstructures with elongated grains with a preferential 〈110〉 orientation aligned parallel to the rolling direction. Tensile yield stresses of 1.82 GPa and 1.33 GPa were obtained for the rolled W and W-25Re respectively, while the recrystallised W-25Re had a yield stress of 0.99 GPa. The elongation to failure was significantly increased by Re alloying from 4 % up to 22 % at room temperature in the rolled material. Examination of the fracture surfaces revealed that the rolled materials failed via transgranular cleavage at room temperature, whereas the recrystallised W-25Re failed by intergranular fracture. There was also evidence of microcracking at room temperature for all three materials which suggested the initial stages of a transition to a delamination failure mode at elevated temperatures. An increase in necking was seen for W-25Re compared with W and an increase in plastic deformation because of alloying. Microcracking in the rolled W may accommodate some of the 4 % elongation measured despite the fact the material had a fracture surface typical of brittle failure. We demonstrate that Re alloying imparts an increase in ductility that can be utilised in combination with rolling to produce strong materials with high temperature compatibility and exceptional room temperature ductility.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107352"},"PeriodicalIF":4.6,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828247","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":"Densification mechanisms and mechanical properties of TiC ceramics prepared via oscillatory pressure sintering","authors":"Qiang Zhang ,&nbsp;Tianbin Zhu ,&nbsp;Yuqi Su ,&nbsp;Heng Wang ,&nbsp;Xiong Liang ,&nbsp;Yawei Li ,&nbsp;Shaobai Sang ,&nbsp;Zhipeng Xie","doi":"10.1016/j.ijrmhm.2025.107357","DOIUrl":"10.1016/j.ijrmhm.2025.107357","url":null,"abstract":"<div><div>Titanium carbide (TiC) ceramics were fabricated via oscillatory pressure sintering (OPS) at 1030–1230 °C, with sintering kinetics systematically analyzed through a high-temperature creep model. The analysis revealed an apparent activation energy of 375.60 kJ/mol under a stress exponent of <em>n</em> = 1, and identified temperature-dependent densification mechanisms: at 1030 °C, densification progressed from particle rearrangement to grain boundary sliding and dislocation glide-climb; at 1080 °C, grain boundary sliding and viscous flow/grain boundary diffusion dominated after initial rearrangement; at 1130 °C, dislocation glide-climb prevailed following particle rearrangement. The maximum densification rate occurred at 1130 °C. Optimal mechanical properties achieved at 1230 °C within the range of 1030 to 1230 °C included a Vickers hardness of 19.7 GPa, flexural strength of 723 MPa, and Young's modulus of 403 GPa. These findings elucidate the correlation between sintering temperature, microstructural evolution, and densification behavior during OPS, thereby providing meaningful insights for the efficient fabrication of TiC ceramics.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107357"},"PeriodicalIF":4.6,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756924","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":"Additive manufacturing of structured grinding wheels with a composite of Cu38Ni34Fe13Sn10Ti5 high-entropy alloy and Ni/Ti dual-coated diamonds: Interfacial characteristics, mechanical properties and grinding performance","authors":"Jianyu Wang ,&nbsp;Guoqin Huang ,&nbsp;Yangli Xu ,&nbsp;Wei Zhang ,&nbsp;Wenhan Zeng ,&nbsp;Chunjin Wang ,&nbsp;Xipeng Xu","doi":"10.1016/j.ijrmhm.2025.107360","DOIUrl":"10.1016/j.ijrmhm.2025.107360","url":null,"abstract":"<div><div>The use of Laser Powder Bed Fusion (LPBF) for additive manufacturing of metal-bonded diamond composites is emerging as a significant and challenging issue, particularly in the fabrication of structured abrasive wheels suitable for precision machining in aerospace, defense, and military industries. In this work, the LPBF process parameters for a new composite of Cu38Ni34Fe13Sn10Ti5 high-entropy alloy and Ni/Ti dual-coated diamonds were optimized based on mechanical performance and interfacial reaction considerations, and fabricated structured abrasive wheels for performance evaluation. Results indicated that the parameter combination of 120 W laser power, 1600 mm/s scan speed, 100 μm hatch spacing, and 30 μm layer thickness achieved superior forming quality and high mechanical strength. The formation of TiC interfacial reaction layers between diamond and the metal matrix was experimentally confirmed. Friction wear test demonstrated the composites' excellent self-sharpening capability, which is critical for diamond tools. Normal and porous structure (named Nor-Str and Por-Str) abrasive wheels were successfully fabricated, with Por-Str exhibiting significantly lower grinding forces and thermal accumulation. These findings establish a technical foundation for the additive manufacturing of diamond-metal composites and the efficient fabrication of functional abrasive tools.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"133 ","pages":"Article 107360"},"PeriodicalIF":4.6,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756929","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}