Journal of Materials Science & Technology最新文献

{"title":"Bifunctional S-scheme sp2-carbon COF/CdS heterojunction for efficient photocatalytic H2 evolution and C–C coupling of 5-hydroxymethylfurfural","authors":"Bin Qi, Rongchen Shen, Zhiqiang Ren, Yuan Teng, Huiling Ding, Xin Zhang, Youzi Zhang, Lei Hao, Xin Li","doi":"10.1016/j.jmst.2025.03.003","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.003","url":null,"abstract":"Combining solar-driven H₂ evolution with the selective conversion of the biomass platform compound 5-hydroxymethylfurfural (HMF) into high-value-added chemicals is promising. However, the development of this approach development is impeded by slow electron-hole separation and uncontrollable HMF conversion. In this study, we present a novel S-scheme <em>sp</em>²-carbon COF (TFPD)/CdS heterojunction bifunctional photocatalyst for the highly selective oxidation of HMF or C–C coupling, integrated with H₂ production. The TFPD/CdS heterojunction forms an intrinsic electric field that facilitates efficient charge separation and migration during the photocatalytic process. Additionally, theoretical calculations and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) reveal that (CHOH)C₄H₂(CHO)∙ radical adsorption and desorption on the catalyst surface are critical for the selective conversion of HMF. Consequently, depending on the reaction atmosphere, this photocatalyst selectively oxidizes HMF to 2,5-diformylfuran (DFF) with over 90% selectivity, or to 2,5-furandicarboxylic acid (FDCA) with approximately 80% selectivity. Notably, by controlling the solvent to promote the desorption of the (CHOH)C₄H₂(CHO)∙ radical, this system also produces HMF dimers with about 89% selectivity, alongside simultaneous H₂ generation. This work pioneers the photocatalytic oxidation of HMF to produce C–C coupling products, providing insights into guiding radical reaction pathways for the selective photocatalytic conversion of HMF.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrostatic self-assembly of MnIn2S4@BiVO4 S-Scheme heterojunction for photothermal-enhanced photocatalytic antibiotic removal with the boosted spatial charge separation","authors":"Chensheng Zhou, Man Zhou, Kangqiang Lu, Weiya Huang, Changlin Yu, Kai Yang","doi":"10.1016/j.jmst.2025.01.039","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.039","url":null,"abstract":"The widespread use of antibiotics has inflicted significant environmental damage, prompting global concern and the urgent need for effective remediation strategies. In this study, by designing the structure and interface functionality on the basis of the different work functions, we developed a novel S-Scheme MnIn₂S₄@BiVO₄ heterojunction via electrostatic self-assembly, displaying the heightened photocatalytic performance in the breakdown of tetracycline hydrochloride (TC) upon visible light irradiation. The removal rate of superior MnIn₂S₄@BiVO₄ heterojunction was 1.83 and 3.55 times higher than that of individual components MnIn₂S₄ and BiVO₄, respectively. By offering a substantial contact area between the catalyst and the reaction solution, the heterogeneous interface boosts the activation and degradation of pollutants. Furthermore, the photothermal effect expedites the degradation reaction. Capturing agent experiments and ESR investigations identified ·O₂⁻ and ·OH as the dominant reactive species driving this degradation process and an analysis of intermediates by HPLC-MS with a notable reduction in the toxicity of the degradation products was conducted to explore a potential degradation pathway for TC. The heightened photocatalytic efficacy of the heterojunction is credited to the S-scheme charge transfer mechanism, which boosts the utilization of charge separation, as evidenced by <em>in-situ</em> XPS and DFT calculations. This study offers novel perspectives on the development of S-scheme heterojunction to improve the photocatalytic degradation of persistent organic pollutants.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"23 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieving 1.5 GPa superstrong Ti-6Al-4V using cold plastic deformed powder feedstock and laser additive manufacturing","authors":"Y.P. Dong, C.T. Zhou, D.W. Wang, X.P. Luo, D. Wang, C.H. Song, J. Zhang, M. Yan","doi":"10.1016/j.jmst.2025.01.038","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.038","url":null,"abstract":"The Ti-6Al-4V alloy is the most widely utilized titanium metal alloy globally, making the enhancement of its mechanical properties important. In this study, we achieved an ultimate tensile strength of 1.5 GPa through the additive manufacturing (AM) of Ti-6Al-4V. Specifically, the Ti-6Al-4V alloy was fabricated via laser powder bed fusion (L-PBF) using Ti-6Al-4V powder subjected to cold plastic deformation (CPD Ti-6Al-4V). The microstructural evolution of the Ti-6Al-4V powder during CPD was analyzed in detail. The CPD Ti-6Al-4V powder exhibited a core-shell structure with subgrains and nanocrystals formed via high-density dislocations within the shell. In addition, the as-printed CPD Ti-6Al-4V alloy had an average grain size of approximately 1.9 μm. The presence of interstitial elements and finer grains resulted in the formation of Ti-6Al-4V alloys with ultrahigh strengths (ultimate tensile strength of approximately 1500 MPa, yield strength of 1320 MPa, and elongation of 6%). This groundbreaking achievement paves the way for further advancements in AM technology and presents exciting opportunities for innovation across a range of high-strength materials, which are crucial for achieving optimal performance.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"39 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled high-quality perovskite single crystals growth for radiation detection: Nucleation and growth kinetics of antisolvent vapor-assisted crystallization","authors":"Jiayi Li, Yazhou Yang, Zhenglan Ye, Dan Chen, Jinlai Cui, Qinxing Huang, Yupeng Zhu, Guangze Zhang, Tao Men, Yuhua Zuo, Jun Zheng, Lei Zhao, Chunlan Zhou, Zhi Liu, Buwen Cheng","doi":"10.1016/j.jmst.2025.02.019","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.019","url":null,"abstract":"Perovskite single crystals (PSCs) have attracted significant interest for next-generation radiation detection. However, the lack of in-depth crystal growth kinetics of PSCs limits the development of high-quality PSCs. Here, with an in-situ real-time monitoring system for MAPbBr₃ PSCs growth during the antisolvent vapor-assisted crystallization (AVC) process, the growth curves of MAPbBr₃ PSCs are obtained and the growth kinetics are theoretically modeled. Two important factors, including antisolvent vapor flux and initial precursor concentration, have been investigated experimentally for their impacts on crystal quality. By controlling the antisolvent vapor flux, the nucleation of PSCs at the container-solution interface can be regulated; while by controlling the initial precursor concentration, the crystal quality can be improved. The optimized MAPbBr₃ PSCs exhibited significantly high qualities, with the narrowest reported full width at half maximum (0.00637°) of X-ray diffraction rocking curve as reported, a trap-state density as low as 2.12 × 10¹⁰ cm⁻³, and a mobility-lifetime (<em>μτ</em>) product of 1.4 × 10⁻² cm² V⁻¹. The fabricated X-ray detectors demonstrated optimal performance at an electric field of 20 V/mm, with a sensitivity of 9.02 × 10³ μC Gy⁻¹ cm⁻² and the lowest detectable dose rate of 0.08 μGy s⁻¹ under irradiation with continuum X-ray energy up to 20 keV. This work provides valuable insights for the development of high-quality PSCs for direct radiation detection.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"18 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing H2 evolution with Mo-N Bonding in Hierarchical Periodic Macroporous Photocatalyst of S-doped g-C3N4 and N-doped MoS2","authors":"Shumin Zhang, Changsheng An, Kaiqiang Xu, Yanyan Zhao, Yong Zhang, Difa Xu, Shiying Zhang","doi":"10.1016/j.jmst.2025.02.020","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.020","url":null,"abstract":"Heterojunctions constructed by traditional methods often result in random stacking of materials, leading to lattice mismatch, which adversely affects the extraction and transfer of photo-generated carriers and, in turn, hampers light utilization efficiency. In this work, we report a novel heterojunction comprising alternating S-doped g-C₃N₄ (SCN) and N-doped MoS₂ (NMS), bridged by Mo–N covalent bonds within hierarchical periodic macroporous (HPM) walls. This heterojunction is synthesized by co-pyrolyzing dicyandiamide, thiourea, and ammonium molybdate. Transient reflectance photoluminescence measurements reveal that the Mo–N covalent bonds serve as “fast tracks” for electron transfer from SCN to NMS, significantly enhancing the charge separation efficiency. Additionally, the well-defined spatial separation of photo-induced carriers, coupled with the efficient mass transfer within the HPM structure, promotes superior carrier utilization. Thanks to the synergistic effect of HPM structures and the bridged Mo–N bonds, the optimized HPM NMS/SCN-1.3 sample exhibits a remarkable H₂ evolution rate of 473.3 µmol g⁻¹ h⁻¹ under visible light irradiation, which is approximately 163 and 19 times higher than bulk g-C₃N₄ (BCN) and HPM SCN, respectively. This work offers valuable insights into the design of HPM heterojunctions composed of co-catalysts and host catalysts, paving the way for enhanced photocatalytic H₂ evolution.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"60 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Abnormal recoverable plastic strain evolution of extruded AZ31 alloy under multiple-degree-of-freedom tension after reciprocating torsion","authors":"Mingyang Jiao, Xuejian Yang, Hui Zhao, Zhijia Liu, Yan Peng, Xianhua Chen, Fusheng Pan, Baodong Shi","doi":"10.1016/j.jmst.2024.12.091","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.091","url":null,"abstract":"The evolution mechanism of the second-order mechanical behaviors under the complex pre-torsion path has not been clarified, which limits its potential application for optimizing precision forming processes of Mg alloy structural components. In this work, the combined loading of reciprocating free-end torsion (FET) and free-rotational tension (FRT) was performed on the extruded AZ31 solid rod with basal fiber texture. The corresponding mechanical response, microstructure evolution, and twinning behaviors were investigated, and the physical mechanism of the second-order behaviors (both the Swift and inverse Swift effects) was discussed. The results indicate that the two-stage deformation of reciprocating torsion is capable of activating tensile twins, effectively refining the surface grains, and thus improving the yield asymmetry. Due to the reverse load, detwinning dominates the deformation of reverse FET (RFET), while detwinning in FRT deformation is caused by the spontaneous rotation of the inverse Swift effect. The twin variants with &lt;em&gt;c&lt;/em&gt;-axis tending to extrusion direction (ED) are predisposed to detwinning, and the bimodal texture introduced by FET is degraded. The plastic deformation of RFET is primarily coordinated by basal and prismatic slips. The large strain FRT is dominated by basal slip due to its low &lt;span&gt;&lt;span style=\"\"&gt;&lt;math&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;S&lt;/mi&gt;&lt;mi is=\"true\"&gt;F&lt;/mi&gt;&lt;mo is=\"true\"&gt;(&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;&lt;span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"&gt;&lt;svg focusable=\"false\" height=\"2.779ex\" role=\"img\" style=\"vertical-align: -0.812ex;\" viewbox=\"0 -846.5 4953.9 1196.3\" width=\"11.506ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"&gt;&lt;g is=\"true\"&gt;&lt;g is=\"true\"&gt;&lt;use xlink:href=\"#MJMATHI-53\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(645,0)\"&gt;&lt;use xlink:href=\"#MJMATHI-46\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(1395,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-28\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(1784,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(2785,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(3785,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-2212\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;g is=\"true\" transform=\"translate(4564,0)\"&gt;&lt;use xlink:href=\"#MJMAIN-29\"&gt;&lt;/use&gt;&lt;/g&gt;&lt;/g&gt;&lt;/g&gt;&lt;/svg&gt;&lt;/span&gt;&lt;script type=\"math/mml\"&gt;&lt;math&gt;&lt;mrow is=\"true\"&gt;&lt;mi is=\"true\"&gt;S&lt;/mi&gt;&lt;mi is=\"true\"&gt;F&lt;/mi&gt;&lt;mo is=\"true\"&gt;(&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;−&lt;/mo&gt;&lt;mo is=\"true\"&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/script&gt;&lt;/span&gt;/CRSS. The interaction between twinning and detwinning dominates the multi-directionality of the Swift effect during reciprocating torsion, and the cumulative effect of strain hardening further enhances the dependence of RFET axial strain on basal slip. The d&lt;em&gt;γ&lt;/em&gt;/d&lt;em&gt;ε&lt;/em&gt; index successfully captures the ev","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"92 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 spacer-free triboelectric textiles for subtle movement tracking and natural body motion energy harvesting","authors":"Yinghong Wu, Sunil Kumar Sailapu, Chiara Spasiano, Carlo Menon","doi":"10.1016/j.jmst.2025.02.016","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.016","url":null,"abstract":"In recent years, triboelectric nanogenerators have emerged as a promising sensing and power technology. Triboelectric textiles are particularly desirable for natural motion tracking and advanced wearable scenarios. However, current approaches mostly rely on a physical spacer at the device interface, fail to integrate triboelectric textiles into clothing, or compromise the breathability and wear comfort for natural and subtle motion tracking. Herein, we propose a triboelectric textile that not only eliminates the need for artificial spacers but also allows for seamless integration into clothing as part of everyday wear. The incorporation of micro-gaps through amine-halogen tribo-pair nanofibers enhances the output fourfold over extended use. The integrated triboelectric garment system is capable of detecting continuous angular changes, such as flexion and extension motions, exhibiting high sensitivity to subtle movements, including human tremors. The design of a lightweight, pocket-sized signal acquisition and transmission module ensures unobtrusive wearability for motion tracking and energy harvesting from natural human activities, thereby opening doors to diverse applications in wearables and healthcare.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"73 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of a novel oxide@h-BN core-shell structure in stainless steel towards superior corrosion and wear resistance","authors":"Jieliang Ye, Yulei Feng, Qi wei, Jingyan Shang, Yueqiao Feng, Zhuguo Li","doi":"10.1016/j.jmst.2024.12.075","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.075","url":null,"abstract":"High corrosion- and wear-resistant stainless steels are highly sought after for demanding marine structural applications. However, most stainless steels with high hardness or outstanding self-lubrication exhibit inferior corrosion resistance, and vice versa. In this study, we propose a strategy for wrapping oxide inclusions with the lubricating phase h-BN through in-situ nitrogen alloying in B-bearing stainless steel, forming a novel oxide@h-BN core-shell structure. The oxides exhibited constrained growth within the h-BN shell, which reduced the particle size and increased the number density. This modification enhanced dispersion strengthening, yielding a composite material hardness of 728 HV_0.5. The h-BN functioned as a solid lubricant during the wear process, significantly lowering the friction coefficient. Additionally, the high electrical insulation and chemical stability of h-BN effectively separated the oxides from the surrounding matrix, thereby preventing pitting corrosion, which is typically associated with oxide dissolution. The increased nitrogen content in the solid solution also enhanced the content of Cr₂O₃ and CrN in the passive film, thereby improving its stability and protective capabilities. As a result, the corrosion resistance of this alloy was nearly comparable to that of 316 L stainless steel, whereas its wear performance surpassed that of M2 tool steel. Our findings offer valuable insights into the design of high-performance stainless steels.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"3 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constructing Schottky contacts via vertical growth of SnS2 nanosheets on hollow microspheres for efficient microwave absorption","authors":"Jingna Wang, Yikun Chen, Huichao Rao, Xiaopeng An, Kai Nan, Yan Wang","doi":"10.1016/j.jmst.2025.01.037","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.037","url":null,"abstract":"Multicomponent core-shell microspheres have garnered significant attention as microwave absorption (MA) materials, owing to their distinctive synergistic effects arising from interfacial polarization and magnetic/dielectric loss. An effective method for optimizing the MA properties of materials is to construct heterogeneous interfacial engineering through component tuning and structural design. Here, a hollow flower-like CoNi@NC@SnS₂ composite was successfully synthesized through high-temperature pyrolysis and vertical growth of SnS₂. The surface of the CoNi@NC microsphere was uniformly coated with SnS₂ nanosheets, resulting in the formation of a core-shell structure. The construction of Schottky barriers through the contact between semiconductors and conductors optimizes polarization relaxation processes and enhances impedance-matching properties. The Schottky interfaces generate a built-in electric field (BIEF) that enhances charge separation and inversion of charge distribution, thereby improving interfacial polarization. Additionally, the Schottky heterogeneous interfaces of composites can be activated through the controllable introduction of defects, resulting in a more robust interfacial polarization. Consequently, the core-shell CoNi@NC@SnS₂ composite demonstrates outstanding MA performance, achieving a minimum reflection loss (RL_min) of −72.6 dB at 1.9 mm and an effective absorption bandwidth (EAB) of 13.2 GHz (ranging from 4.8 to 18.0 GHz) across a thickness range of 1.5–4.0 mm. This research offers novel insights into the mechanisms that underlie polarization loss and facilitates the development of high-performance MA materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling the CMAS corrosion mechanism of CrTaO4: A promising dual function oxidation and thermal protection material for RHEAs","authors":"Shuang Zhang, Xiaohui Wang, Huimin Xiang, Cheng Fang, Wei Xie, Hailong Wang, Yanchun Zhou","doi":"10.1016/j.jmst.2025.02.017","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.017","url":null,"abstract":"CrTaO₄ has been found to play a pivotal role in the protection of refractory high-entropy alloys (RHEAs) from high-temperature oxidation and thermal attack due to its high melting point, low thermal conductivity, close thermal expansion coefficient (TEC) to RHEAs. These appealing properties enable CrTaO₄ as a new type of protective scale material for high-temperature applications such as in air breathing jet engines. For such engine applications, CaO-MgO-Al₂O₃-SiO₂ (CMAS) corrosion is a critical issue. However, the corrosion behavior of CrTaO₄ under CMAS attack remains unknown so far. Here, the corrosion resistance of CrTaO₄ to molten CMAS is comprehensively studied. It is demonstrated that the CMAS corrosion resistance is significantly superior over commercial yttrium-stabilized zirconia and the commonly investigated thermal barrier coating materials. Element and phase compositional analyses indicate dense and CMAS corrosion-resistant layers are established between CMAS and the CrTaO₄ substrate. The interface reaction between the CrTaO₄ substrate and CMAS at 1250 and 1300°C gives rise to a dense layer composed of CaTa₂O₆ and Mg(Cr,Al)₂O₄ spinel just beneath the molten CMAS. At 1350°C, a phase composition gradient layer, composed of crystalline phases CaTa₂O₆/CaTa₂O₆ + Mg(Cr,Al)₂O₄/CaTa₂O₆ + Cr₂O₃, is formed. With increased calcium consumption due to more Ca-containing crystalline phase formation upon elevating temperature, the Ca/Si ratio in CMAS melt declines, thereby increasing the viscosity of the melt and mitigating the penetration of CMAS into the CrTaO₄ substrate.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"26 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}