Wear最新文献

{"title":"Enhancing the tribological behavior of high-speed train braking interfaces and suppressing stick-slip vibration via the stacking of disc springs","authors":"Jin Peng ,&nbsp;Zaiyu Xiang ,&nbsp;Jiakun Zhang ,&nbsp;Shaohao Deng ,&nbsp;Xiaoqin Liu","doi":"10.1016/j.wear.2025.206475","DOIUrl":"10.1016/j.wear.2025.206475","url":null,"abstract":"<div><div>During low-speed braking of high-speed trains, the frictional interaction at the braking interface often triggers severe stick-slip instability, manifesting as friction-induced stick-slip vibration (FISSV). This generates sharp frictional noise and accelerates wear, causes block detachment, and compromises system stability, posing risks to operational safety. Thus, effective strategies are urgently needed to improve tribological behavior and suppress FISSV. Floating brake blocks based on disc spring structures have shown promise; however, the theoretical basis for optimizing spring number and stiffness remains insufficient. In this work, a floating friction block design with stacked disc springs is proposed to enhance tribological performance and vibration suppression. Comparative experiments were performed on a multifunctional friction test rig, evaluating a fixed connection and three disc spring configurations (2, 4, and 6 springs). Surface morphology characterization and finite element simulations were conducted to further reveal suppression mechanisms. Results show that floating structures consistently outperform fixed ones, yet suppression exhibits a nonlinear dependence on spring number. Among the tested configurations, the four-spring (SPR4) design delivered the most favorable performance: displacement, acceleration, and noise RMS values decreased by 35.68 %, 54.37 %, and 49.14 %, respectively, while friction force RMS increased by 41.5 %. SPR2 generated unstable adhesion-slip cycles, whereas SPR6 showed noise amplification at later stages. Mechanistic analysis demonstrated that suppression is achieved through a cooperative “moderate - compliance - hysteresis - uniform - redistribution” effect, with SPR4 forming stable contact plateaus and uniform stress distribution. These findings identify medium-stiffness floating structures as the optimal solution, offering theoretical and engineering guidance for the design of high-speed train brake pads.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206475"},"PeriodicalIF":6.1,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Al-Si coating quantity on the wear behavior of 22MnB5 steel in hot stamping","authors":"Hee Geon Lee ,&nbsp;Min-Ki Ji ,&nbsp;Hyun-Hak Kang ,&nbsp;Hyun-sung Son ,&nbsp;Tea-Sung Jun","doi":"10.1016/j.wear.2025.206471","DOIUrl":"10.1016/j.wear.2025.206471","url":null,"abstract":"<div><div>This study investigates the wear behavior of Al-Si-coated 22MnB5 steel, with respect to coating quantity, during a simulated hot-stamping process. A strip-drawing tribometer was used to replicate the process. Specimens were prepared with three distinct coating quantities (AS40, AS80, and AS140) and were subjected to an identical heat treatment at 900 °C for 5 min. Under the specific contact pressure and sliding velocity conditions tested in this study, tribological tests revealed that specimens with higher coating quantities exhibited lower friction coefficients and increased tool weight. In contrast, specimens with lower coating quantities exhibited the opposite trend. The level of oxidation varied inversely with coating quantity, with lower coating quantities promoting greater iron oxide formation. As the coating quantity increased, the amount of residual aluminum (Al) available for alloying also increased. This variation in residual Al was a critical factor that dictated the reaction pathways of the diffused iron (Fe), which either formed intermetallic compounds or oxides. Our findings demonstrate that variations in the Al-Si coating quantity, followed by heat treatment, significantly influence the friction behavior, tool wear, Fe reaction pathways, and oxidation characteristics during the hot-stamping process.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206471"},"PeriodicalIF":6.1,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study of impregnated diamond bit, Part 1: Bit wear","authors":"Rui Huang,&nbsp;Thomas Richard,&nbsp;Masood Mostofi","doi":"10.1016/j.wear.2025.206467","DOIUrl":"10.1016/j.wear.2025.206467","url":null,"abstract":"<div><div>Impregnated diamond bits are designed with segments containing multiple layers of embedded diamonds. As the outermost layer of diamonds wears out, the next layer of sharp diamonds is exposed, sustaining performance in drilling hard and abrasive formations. Although allowing diamonds to wear fully before renewal may seem optimal for bit life, industry practices often prioritize maintaining sharp diamonds. This raises a key question: which approach delivers greater efficiency? Answering this question requires a clear understanding of bit wear mechanisms, the variables governing their occurrence, and associated wear rates. Previous studies have described different wear mechanisms, but most have been qualitative and lacked methods to quantify the bit wear state and wear rate. This research addresses these gaps by: (i) developing a systematic experimental methodology to track bit wear while drilling, and (ii) conducting a comprehensive study to identify dominant wear mechanisms and quantify wear rates under various drilling conditions.</div><div>With the proposed methodology, bit wear was investigated across seven rock types, five depths of cut (thickness of rock removed per bit revolution), and three angular velocities. The results led to the development of a conceptual wear model governed by depth of cut, identifying three distinct wear regimes and two critical depths of cut. Wear rates for each regime were quantified for rock types studied. The model provides a practical framework to select the optimum depth of cut based on rock properties. A sequel to this paper will explore the relationship between bit wear state and drilling response, which is defined as the relation between depth of cut and forces (axial thrust and torque) acting on the bit.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206467"},"PeriodicalIF":6.1,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amorphous CaSO4 nanocrystal deposits for friction and wear reduction at silicon interfaces","authors":"Tijn Vernooij ,&nbsp;H. Tunç Çiftçi ,&nbsp;Noushine Shahidzadeh ,&nbsp;Bart Weber","doi":"10.1016/j.wear.2025.206457","DOIUrl":"10.1016/j.wear.2025.206457","url":null,"abstract":"<div><div>When an object is placed on a surface, friction and wear cause uncertainty in its exact position, and thus challenge precision manufacturing. Here, we explore the development of a sacrificial nanocrystal deposit that can suppress friction and wear. Amorphous CaSO₄ nanocrystals are deposited through salt solution droplet deposition followed by evaporation. During droplet drying, a precursor film of the aqueous CaSO₄ solution spreads onto a hydrophilic silicon wafer, thus nucleating evenly spread unfaceted amorphous nanocrystals of CaSO₄ on the wafer surface. We used atomic force microscopy to study the extent, topography, and friction and wear behavior of the deposited nanocrystals. We find that the sacrificial layer of nanocrystals is easy to apply and remove, spreads over large (few cm) areas with a constant thickness of about 8 nm, and has favorable friction and wear behavior.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206457"},"PeriodicalIF":6.1,"publicationDate":"2025-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure and third-body behavior of Cu-MoS2-TiC composite coatings deposited by cold spray","authors":"Aosong Li ,&nbsp;Wendong Fang ,&nbsp;Tongyue Liang ,&nbsp;Sima A. Alidokht ,&nbsp;Phuong Vo ,&nbsp;Bertrand Jodoin ,&nbsp;Richard R. Chromik","doi":"10.1016/j.wear.2025.206464","DOIUrl":"10.1016/j.wear.2025.206464","url":null,"abstract":"<div><div>To investigate the effect of ceramic particle addition on the properties of cold sprayed MoS₂-based metal matrix composite coatings, Cu-MoS₂ and Cu-MoS₂-TiC coatings were deposited using feedstocks containing 0 (CM), 15 (CM-15T), 30 (CM-30T) and 50 (CM-50T) wt% TiC, respectively, while maintaining a constant MoS₂ ratio of 5.5 wt% relative to the combined Cu and MoS₂ powders. The influence of TiC content on the coatings microstructure and mechanical properties was systematically evaluated. TiC addition led to a tamping effect that densified the coatings and enhanced plastic deformation of the Cu matrix, thereby improving cohesion strength as well as nano- and micro-hardness. However, MoS₂ retention decreased in CM-30T and CM-50T. Polished coating surfaces were tested for reciprocating sliding wear using a ball-on-plate tribometer in dry air and nitrogen, with Al₂O₃ spheres as counterbodies. CM showed low coefficients of friction but the highest wear rate in both environments because of its inferior mechanical properties. In dry air, CM-15T demonstrated the lowest friction and superior wear resistance, attributed to its high MoS₂ retention and improved mechanical properties. Mild abrasive wear in CM-15T suggested a significant reduction in adhesive wear which was dominant for the other coatings. In nitrogen, adhesive wear was minimal for all coatings. The high MoS₂ content in CM-15T contributed to low coefficients of friction. CM-50T exhibited the lowest wear rate, benefiting from its high hardness, enhanced cohesion strength, and more retained TiC particles that facilitated the fast formation of hard tribo-layers. These findings highlight the interplay between tribological behavior, mechanical properties, tribo-oxidation, and third-body effects in metal matrix composite coatings incorporating solid lubricants and hard phases.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206464"},"PeriodicalIF":6.1,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wear mechanism and wear particles characterization of Zr-2.5Nb, ZTA, and CoCrMo articulating with UHMWPE in multidirectional motion","authors":"Ruijuan Liu ,&nbsp;Yali Zhang ,&nbsp;Xinle Li ,&nbsp;Xiaogang Zhang ,&nbsp;Jian Pu ,&nbsp;Qin Xiong ,&nbsp;Wen Shi ,&nbsp;Zhongmin Jin","doi":"10.1016/j.wear.2025.206459","DOIUrl":"10.1016/j.wear.2025.206459","url":null,"abstract":"<div><div>In traditional metal-on-polyethylene (MoP) implants, especially cobalt chrome molybdenum-ultra high molecular polyethylene (CoCrMo-UHMWPE) pairing, wear primarily occurs in the PE component. The wear particles from PE are considered a major cause of implant loosening and artificial joint failure. The development of oxidized zirconium-2.5 % niobium (Zr-2.5Nb) and zirconia-toughened alumina (ZTA) has shown promise in reducing wear and osteolysis risks. However, comparative studies on the wear mechanisms and wear particle characteristics of Zr-2.5Nb-UHMWPE, ZTA-UHMWPE, and CoCrMo-UHMWPE remain limited. In this study, Zr-2.5Nb, ZTA, and CoCrMo were selected and paired with UHMWPE as pairing materials. The wear mechanism was studied from the aspects of wear behavior and wear particle characterization at different contact pressures from 2 MPa to 4 MPa under multidirectional motion. The UHMWPE wear loss from Zr-2.5Nb-UHMWPE was 48 %, 27 %, and 18 % lower than that of CoCrMo-UHMWPE bearings at 2, 3, and 4 MPa. The results showed that there was no significant difference in the wear loss of UHMWPE from Zr-2.5Nb-UHMWPE and ZTA-UHMWPE at 2 MPa, but 34.5 % higher than that of ZTA-UHMWPE at 4 MPa. Zr-2.5Nb-UHMWPE exhibited a similar wear performance to ZTA-UHMWPE with no visible scratches on the surface of Zr-2.5Nb and ZTA, while multidirectional scratches appeared on the surface of CoCrMo. Moreover, the UHMWPE wear particles were consistent in size range and morphology, but different in quantity and size distribution at all loading conditions. The number of UHMWPE wear particles produced by the Zr-2.5Nb-UHMWPE pairing was 44 %–60 % lower than that of the CoCrMo-UHMWPE at 2, 3, and 4 MPa. However, the UHMWPE wear particles produced by Zr-2.5Nb-UHMWPE and ZTA-UHMWPE were very similar, which were 153 and 157 at 4 MPa, respectively. With increasing load, size distribution results revealed that the proportion of large-sized wear particles gradually increased for the three pairings. Notably, the UHMWPE wear particle from the Zr-2.5Nb-UHMWPE pairing exhibited the largest average particle size. Shape distribution analysis further indicated that the UHMWPE wear particle generated by the Zr-2.5Nb-UHMWPE pairing was predominantly fibrous in morphology, whereas that from the CoCrMo-UHMWPE pairing displayed the highest proportion of round and oval shapes. Based on the analysis of wear morphology and wear particle characteristics, the results showed that the wear mainly occurred in UHMWPE. Plastic deformation was the main cause of wear particle formation, and the wear mechanisms were adhesive wear and abrasive wear. This study compared the tribological behaviors of three typical pairings, providing a valuable understanding of artificial hip joint materials, which will contribute to optimizing orthopedic implant materials.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206459"},"PeriodicalIF":6.1,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tribo-mechanisms of Cr2AlC nanocoating in lead-bismuth eutectic under multi-stage fretting cycles: Oxide-driven self-adaptive fretting wear protection","authors":"Guangzhao Wang ,&nbsp;Hui Chen ,&nbsp;Xiaoyu Sun ,&nbsp;Wenqi Song ,&nbsp;Zhenyu Wang ,&nbsp;Guorui Zhu","doi":"10.1016/j.wear.2025.206460","DOIUrl":"10.1016/j.wear.2025.206460","url":null,"abstract":"<div><div>In Generation IV lead-cooled fast reactors, austenitic 316L stainless steel steam generator tubes are susceptible to both dissolution corrosion and fretting fatigue wear in liquid lead–bismuth eutectic (LBE) environment. To address this challenge, a Cr₂AlC nanocoating was deposited on 316L tubes and evaluated through multi-stage fretting wear tests in LBE at 450 °C, using a self-developed high temperature tribo-tester with a tube–plate contact configuration. The results demonstrate that the coating maintains a stable friction coefficient (0.6 ± 0.05) throughout 5 × 10³ to 2 × 10⁶ cycles, representing an approximately 40 % reduction compared to bare 316L stainless steel. The maximum wear depth stabilizes at 14.2 ± 0.1 μm, approximately 70 % lower than that of uncoated 316L. Multiscale characterization by SEM/EDS, XRD, and nanoindentation revealed a three-stage friction response on the coating: an initial stage where the coating surface remains intact, and wear occurs mainly on the plate; a transitional stage characterized by the formation of a discontinuous third-body layer (TBL) comprising oxides and wear debris, exhibiting relatively low mechanical properties; and a stable stage dominated by a compact TBL primarily consisting of Cr³⁺-doped α-Al₂O₃, the wear surface H²/E³ ratio increases, which enhances resistance to both wear and Pb-Bi corrosion. The proposed Cr₂AlC self-adaptive protection mechanism offers a scientific basis for designing wear-resistant coatings for steam generator tubing in Generation IV nuclear reactors.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206460"},"PeriodicalIF":6.1,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differential effects of Ti addition on microstructure and corresponding mechanical and tribological properties of AlCr3Fe3NiTix high-entropy alloys","authors":"Guijiang Diao ,&nbsp;Zhen Xu ,&nbsp;Anqiang He ,&nbsp;Doug Fraser ,&nbsp;Reinaldo Chung ,&nbsp;Jing Li ,&nbsp;D.Y. Li","doi":"10.1016/j.wear.2025.206463","DOIUrl":"10.1016/j.wear.2025.206463","url":null,"abstract":"<div><div>High-entropy alloys (HEAs), particularly those with an A2+B2 dual-phase structure, offer balanced strength and toughness, leading to superior and well-adjustable wear resistance. The effect of titanium, known to promote the formation of hard intermetallic phases and enhance mechanical properties, on A2+B2 dual-phase HEAs remains less understood. In this work, selecting a representative AlCr₃Fe₃Ni alloy with A2+B2 phases as the base alloy, we systematically investigated the phase evolution induced by various amounts of Ti addition and their differential effects on the sliding wear and solid-particle erosion of AlCr₃Fe₃NiTi_x HEAs (x = 0–1.5, molar ratio). Microstructural analysis reveals that Ti addition promotes the formation of AlNi₂Ti-type L2₁ and (Fe,Cr)₂Ti-type C14 Laves phases, both of which strengthen the alloys at the expense of plasticity. However, a low Ti content (i.e., x = 0.2) helps improve both yield strength and plasticity, due to the solid-solution strengthening effect and refinement of grain size. Micro-indentation and scratching tests demonstrate that the C14 Laves phase exhibits the highest hardness but the lowest toughness, whereas the A2+B2 dual-phase structure possesses the highest toughness but the lowest hardness. The L2₁ phase displays intermediate properties between the two. Sliding wear and dry-sand erosion tests reveal that moderate Ti additions enhance wear resistance through solid-solution strengthening, hard-phase reinforcement, and oxidation-induced surface protection. However, erosion resistance deteriorates with increasing Ti content, primarily due to lowered toughness under impact conditions. This study elucidates the dual roles of Ti-induced hard yet brittle phases, i.e., beneficial for sliding wear resistance but detrimental to erosion performance in impact-involving environments requiring higher toughness. The findings provide valuable insights into structure-property relationships for the design of advanced structural and tribo-materials.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206463"},"PeriodicalIF":6.1,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a white-box model for predicting in-process thermo-mechanical loading on PVD-coated carbide tools","authors":"T. Bergs ,&nbsp;M. Meurer ,&nbsp;M. Abouridouane ,&nbsp;K. Bobzin ,&nbsp;C. Kalscheuer ,&nbsp;M. Tayyab","doi":"10.1016/j.wear.2025.206458","DOIUrl":"10.1016/j.wear.2025.206458","url":null,"abstract":"<div><div>PVD coatings are widely used to improve tool life and machining efficiency, yet accurate tool-life prediction remains challenging because thin layers require very fine meshes, coating wear mechanisms are complex, and the coating-substrate interface introduces difficult thermal and mechanical boundary conditions. Traditional white-box models frequently neglect coating effects due to simplified assumptions, whereas black-box models capture complexity but lack physical interpretability. Grey-box approaches offer a promising compromise but require detailed coating- and load-dependent datasets. This study develops a finite-element (FE) model to predict in-process thermo-mechanical loading on PVD-coated carbide tools. The white-box model supports the extensive experimental testing typically required to generate thermo-mechanical load tables for grey-box tool-life prediction. Monolayer TiAlCrSiN and bilayer TiAlCrSiN/TiAlCrSiON coatings-commercially established and representative of industrial thermal-barrier behaviour were tested in orthogonal cutting of C45 + N steel. Cutting forces and tool temperatures were measured using a dynamometer and an embedded two-colour pyrometer for model validation. The model reproduces forces and temperatures with deviations below 10 % and shows that tool wear strongly affects local thermo-mechanical load distributions, while global loads remain similar between the coatings. Friction characterization reveals a tribological advantage of the bilayer coating, with reduced interface friction and smoother surfaces. High-resolution stress and temperature fields are correlated with coating properties to improve wear modelling and provide structured inputs for future grey-box model development.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206458"},"PeriodicalIF":6.1,"publicationDate":"2025-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on the tribological performance of (NiCrFe)83(TiAl)17 high-entropy alloy-matrix self-lubricating coatings in helium environment","authors":"Dongsheng Yang ,&nbsp;Zhilong Zhao ,&nbsp;Yushan Geng ,&nbsp;Qichun Sun ,&nbsp;Wenyuan Chen ,&nbsp;Juanjuan Chen ,&nbsp;Shengyu Zhu ,&nbsp;Jun Cheng ,&nbsp;Peiqing La","doi":"10.1016/j.wear.2025.206449","DOIUrl":"10.1016/j.wear.2025.206449","url":null,"abstract":"<div><div>This study successfully developed a (NiCrFe)₈₃(TiAl)₁₇-Al₂O₃-Ag/(BaF₂/CaF₂) composite self-lubricating coating and systematically investigated its tribological performance in helium environments from room temperature to 600 °C. The results revealed that the coating possessed a stable high-entropy phase structure consisting of a (Ni, Ti)-enriched BCC matrix and (Cr, Fe)-enriched FCC precipitates. The Al₂O₃ reinforcement phase increased the surface hardness to 692.17 HV through particle strengthening, representing a 21.3 % improvement over the (NiCrFe)₈₃(TiAl)₁₇ base material. The synergistic effect between the lubricating phases and Al₂O₃ reduced the friction coefficient to 0.25–0.31 and significantly decreased the wear rate to (0.8–3.5) × 10⁻⁵ mm³/N·m within the RT-400 °C range. As temperature increased, the friction interface underwent systematic evolution: a partial lubricating film formed at RT with dominant abrasive wear; the composite lubricating film expanded between 200–400 °C, effectively suppressing three-body wear; at 600 °C, BCC phase depletion caused the wear mechanism to transition to a mixed abrasive-adhesive mode. The synergistic strengthening between Al₂O₃ and the lubricating phases was identified as the key factor enabling the coating's excellent performance across the wide temperature range.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":"586 ","pages":"Article 206449"},"PeriodicalIF":6.1,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}