Ceramics International最新文献

{"title":"Photovoltaic effects in BiVO4/ZnTiO3 multilayer films with high fill factor","authors":"Jin Qin ,&nbsp;Zuo Tian ,&nbsp;Gang Chen ,&nbsp;Yu Zhao","doi":"10.1016/j.ceramint.2024.10.024","DOIUrl":"10.1016/j.ceramint.2024.10.024","url":null,"abstract":"<div><div>Bismuth-based semiconductor materials have garnered significant attention because of their appropriate optical bandgap and substantial photoelectric conversion efficiency. Enhancing the photocurrent and fill factor of photovoltaic films is essential for developing high-performance optoelectronic devices. In this study, high-performance BiVO₄-ZnTiO₃ multilayer films were fabricated using a straightforward sol-gel method, where the incorporation of ZnTiO₃ films significantly improved the photovoltaic performance of BiVO₄. Through structural design aimed at enhancing light utilization, the BiVO₄-ZnTiO₃ multilayer film achieved a photocurrent density of 1.9 mA/cm² at 450 nm, along with a fill factor of 46.8 % in the composite multilayer structure. The improvement in film performance is attributed to the overall multilayer stacking effect. This study offers a novel approach for utilizing bismuth-based semiconductors in optoelectronics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51119-51127"},"PeriodicalIF":5.1,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700332","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":"Lightweight and multiscale ZrO2-SiOC coated carbon/phenolic composites with enhanced oxidation and ablation resistance","authors":"Wei Gao,&nbsp;Yongzheng Zhang,&nbsp;Yanli Wang,&nbsp;Liang Zhan","doi":"10.1016/j.ceramint.2024.10.018","DOIUrl":"10.1016/j.ceramint.2024.10.018","url":null,"abstract":"<div><div>The carbon/phenolic composites are extensively considered as an efficient ablative thermal protection material, but inferior oxidation-ablation resistance has limited their further application. In this work, a multiscale ZrO₂-SiOC coated carbon/phenolic composite (NCF/ZSAx-PA) was fabricated through a dual-stage construction strategy. The as-prepared composites exhibited a low density (0.314–0.348 g/cm³), low thermal conductivity (0.0605–0.0725 W/(m·k)) and promoted compressive strength (2.95/5.08 MPa in the Z/XY direction). Benefiting from the formation of a protective ZrO₂-SiO₂ ceramic coating, the multiscale composites showed excellent anti-oxidation and ablation performance. The residual weight of NCF/ZSAx-PA was 19.41 % at 1000 °C while the unmodified carbon/phenolic composites were entirely burnt off under an air atmosphere. Besides, the NCF/ZSAx-PA exhibited low back temperature (53.6 °C), low linear ablation rate (0.0519 mm/s), and low mass loss rate (0.0100 g/s) under the 3.62 MW/m² oxyacetylene assessment. All the superior properties enabled the NCF/ZSAx-PA a prospective application on the thermal protection system.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51077-51086"},"PeriodicalIF":5.1,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700455","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":"Structure, microstructure, and ESR properties of concentration-dependent Zn1-xMnxO nanoparticles","authors":"C. Boyraz ,&nbsp;M.M. Seker Perez ,&nbsp;L. Arda","doi":"10.1016/j.ceramint.2024.09.432","DOIUrl":"10.1016/j.ceramint.2024.09.432","url":null,"abstract":"<div><div>In this study, the estimated stress, strain, and crystallite sizes of different Mn-doped ZnO nanoparticles were calculated using the Williamson-Hall method and compared with the values obtained from the Debye-Scherrer formula. Moreover, defects, and magnetic properties of Mn-doped ZnO nanoparticles at different concentrations were investigated. The sol-gel method was used to synthesize nanoparticles. The X-ray diffraction and Rietveld analysis results confirm that the desired structure is formed and that no secondary phase is present up to an Mn concentration of x = 0.2. In and out of plane lattice parameters, cell volumes, bond length, atomic locality, and dislocation density (δ) were clarified. The grain size of the concentration-dependent samples was provided by scanning electron microscope. Photoluminescence (PL) spectra exhibited ultraviolet emission along with a broad band encompassing violet, blue, and red regions, attributed to defect-related and excitonic emissions. These emissions were notably influenced by synthesis conditions and doping elements and ratios. Electron spin resonance properties of the concentration-dependent samples were analyzed to figure out the g-factor through line widths of pike-to-pike (<em>ΔHPP</em>) of ESR spectra. Mn-doped ZnO nanoparticles exhibited ferromagnetism at room temperature.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50855-50866"},"PeriodicalIF":5.1,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700308","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":"Characteristics of NixCoxMgxCuxZn1-4xO nanomaterials: Their structural and magnetic properties and functional attributes","authors":"Trinh Duc Thien ,&nbsp;Nguyen Van Thang ,&nbsp;Le T.M. Cham ,&nbsp;Pham Duc Thang ,&nbsp;Nguyen Dang Co ,&nbsp;Pham Van Duong ,&nbsp;Pham Hong Minh ,&nbsp;Nguyen Dinh Lam","doi":"10.1016/j.ceramint.2024.10.019","DOIUrl":"10.1016/j.ceramint.2024.10.019","url":null,"abstract":"<div><div>The current study evaluates the photocatalytic, structural, morphological, optical, and magnetic characteristics of the Ni_xCo_xMg_xCu_xZn_1-4xO nanomaterials (x = 0.000–0.010). The Ni_xCo_xMg_xCu_xZn_1-4xO nanomaterials were synthesized using the temperature-assisted co-precipitation technique. The characteristics of the Ni_xCo_xMg_xCu_xZn_1-4xO nanomaterials were investigated using X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), UV–Vis spectroscopy, and Vibrating sample magnetometer (VSM). XRD analysis revealed dopant incorporation into the ZnO crystal structure, affecting lattice parameters. Magnetic behavior transitioned from diamagnetic to a combination of diamagnetic and ferromagnetic with increasing dopant levels. The optical band gap decreased as dopant concentration increased. Notably, the nanomaterial with x = 0.001 exhibited optimal photocatalytic performance, degrading 98.9 % of Rhodamine B within 20 min under UV light. This nanomaterial also showed efficacy against Methyl Orange and Congo Red, with hydroxyl radicals playing a crucial role in pollutant removal. These findings provide the exceptional reusability and stability of the Ni_xCo_xMg_xCu_xZn_1-4xO nanomaterials (x = 0.001)</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51087-51097"},"PeriodicalIF":5.1,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700456","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":"Boosting the thermoelectric performance of Bi2S3 by CeCl3 addition and hydrothermal synthesis","authors":"Li Zhang ,&nbsp;Hui Liu ,&nbsp;Yaozhen Shen ,&nbsp;Yuanting Wu ,&nbsp;Guoquan Suo ,&nbsp;Beibei Zhu ,&nbsp;Yanling Yang","doi":"10.1016/j.ceramint.2024.10.009","DOIUrl":"10.1016/j.ceramint.2024.10.009","url":null,"abstract":"<div><div>Bi₂S₃ is a potential thermoelectric material due to its high Seebeck coefficient (<em>S</em>), low thermal conductivity (<em>κ</em>) and environmentally friendly elemental composition. However, pristine Bi₂S₃ suffers from a low thermoelectric performance primarily owing to the intrinsic low electrical conductivity (<em>σ</em>). In this work, we employ CeCl₃ doping to promote the <em>σ</em> of Bi₂S₃ by a hydrothermal method. Doping 1.0 % mol CeCl₃ provides more electrons to increase the carrier concentration to 2.73 <span><math><mrow><mo>×</mo></mrow></math></span> 10¹⁹ cm⁻³ of Bi₂S₃ at room temperature, which leads to significant high <em>σ</em> and power factor of 242 μW m⁻¹ K⁻² at 573 K. In addition, the formation of micro–nano pores in the doped Bi₂S₃ bulk samples contribute to the phonon scattering as well as the reduction of lattice thermal conductivity. A peak <em>ZT</em> of ∼0.31 at 623 K is obtained in the Bi₂S₃ bulk sample doped with 1.0 % mol CeCl₃, which is almost twice as high as the pristine Bi₂S₃. Simultaneously, the Vickers hardness of 1.0 % mol CeCl₃ doped Bi₂S₃ samples achieves to approximately 1.28 GPa, which is enhanced by nearly 40 % compared to pristine Bi₂S₃. This study has provided a facile method for realizing high thermoelectric performance and high mechanical property of Bi₂S₃ materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50982-50988"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700448","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":"Sr-Mg co-doped Hardystonite/Polycaprolactone electrospun scaffolds: Fabrication and characterization for enhanced bone regeneration","authors":"Pegah Dehghanpour,&nbsp;Rahmatollah Emadi,&nbsp;Hamidreza Salimijazi","doi":"10.1016/j.ceramint.2024.10.012","DOIUrl":"10.1016/j.ceramint.2024.10.012","url":null,"abstract":"<div><div>The production of scaffolds is a primary objective in tissue engineering for treating bone defects and diseases. The electrospinning process offers a promising technique to create structures resembling the extracellular matrix. Artificial polymeric grafts, such as poly(caprolactone) (PCL), often face issues of low strength and degradation. To overcome these limitations, we introduce ceramic reinforcing particles, specifically hardystonite (Ca₂ZnSi₂O₇), known for its benefits in tissue regeneration. Considering the undeniable role of strontium and magnesium in bone regeneration, the aim of this study was to investigate and compare produced scaffolds with and without dopant elements, incorporated into hardystonite. Initially, strontium-magnesium-doped hardystonite (DHT) nanopowder was synthesized through mechanical milling followed by thermal treatment. The successful formation of a single-phase hardystonite structure was verified by X-ray diffraction (XRD), with estimated crystallite and particle sizes of approximately 41.6 nm and 77.23 ± 36.60 nm, respectively. Subsequently, PCL/DHT composite scaffolds were fabricated with 3 wt%, 5 wt%, and 10 wt% bioceramic content. These scaffolds were assessed for fiber morphology, physical and chemical properties, hydrophilicity, surface roughness, mechanical characteristics, degradation, and biocompatibility. The results indicate that PCL/5 wt% DHT scaffolds exhibit superior biological, physical, and mechanical properties. Across all these tests, the PCL/5 wt% DHT scaffold consistently outperformed the others, suggesting its promising potential in bone tissue engineering.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51011-51029"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700450","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":"Limited dissolution of transition metals in the nanocrystalline cerium (IV) oxide","authors":"Agata Ducka ,&nbsp;Patryk Błaszczak ,&nbsp;Marcin Zając ,&nbsp;Adrian Mizera ,&nbsp;Francesco d'Acapito ,&nbsp;Beata Bochentyn","doi":"10.1016/j.ceramint.2024.10.004","DOIUrl":"10.1016/j.ceramint.2024.10.004","url":null,"abstract":"<div><div>Nanocrystalline cerium (IV) oxides doped with transition metals have gained significant interest recently, mostly in the field of catalysis. Herein, we present the comprehensive studies on ceria doped with 10 mol.% of transition metals (Mn, Fe, Co, Ni or Cu) synthesized by the reverse microemulsion method. The aim of this work is to study the properties of those materials with the use of different complementary methods like XRD, SEM, TPR, and XPS and to determine the possibility of fabrication of single-phase materials with that doping level. Studies presented here prove that despite showing single-phase XRD patterns with high nanocrystallinity, in all obtained materials, the dopants are not fully incorporated in the ceria lattice. Spectroscopy studies show that additional transition metal oxides are present on the surface of all materials. Herein, we also present the analyses of L_3,2-edges of transition metals in ceria, as well as high energy Ce K-edge to prove that 10 mol.% of any of those transition metals cannot be incorporated in the ceria host without the formation of additional phases. Using techniques presented here, it was found that the highest share of Mn can be dissolved in the lattice, while Cu is mostly present as a surficial Cu₂O. Studies presented are an important contribution to the discussion about the solubility limits in nanocrystalline ceria and its properties which may be utilized for e.g various catalysts or as electrolytes.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50921-50933"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The apatite-forming ability of bioactive glasses – A comparative study in human serum and Kokubo's simulated body fluid","authors":"Adrian Szewczyk ,&nbsp;Adrianna Skwira-Rucińska ,&nbsp;Marta Osińska ,&nbsp;Magdalena Prokopowicz","doi":"10.1016/j.ceramint.2024.10.013","DOIUrl":"10.1016/j.ceramint.2024.10.013","url":null,"abstract":"<div><div>Currently, the apatite-forming ability evaluation of a biomaterial employs Kokubo's simulated body fluid (SBF) as a testing medium. As the conventional SBF simulates only the ionic composition and pH of human serum (HS), this study aimed to compare the apatite formation in SBF and HS on the sol-gel-derived bioglass (BG) 83S2 and commercial 45S5 as well as to verify the influence of preincubation of BG in both fluids on cytocompatibility towards human fetal osteoblast cell line hFOB 1.19. The apatite formation in HS was hindered, regardless of the type of used BG. Relatively higher apatite-forming ability was noticed for BG83S2. In direct contact test, both BGs were cytocompatible towards osteoblasts, regardless of the type of used fluid. In the case of extracts; however, only the extract obtained from BG83S2 preincubated in HS did not show the cytotoxic effect. The evaluation of apatite-forming ability in SBF appears to be a fast screening method for comparing the apatite-forming ability of various bioglasses. Nonetheless, SBF is unable to precisely imitate the morphology and crystallinity of apatite observed during the assay in HS, as well as it does not mimic the changes in profiles of osteogenic ions.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51030-51042"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced electrochemical performance of garnet Li7La3Zr2O12 electrolyte by efficient incorporation of LiCl","authors":"Yali Luo ,&nbsp;Jiaxin Dong ,&nbsp;Yuanjun Wang ,&nbsp;Zhaoqi Wang ,&nbsp;Zi'ang Chen ,&nbsp;He Zhang","doi":"10.1016/j.ceramint.2024.10.015","DOIUrl":"10.1016/j.ceramint.2024.10.015","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Garnet-type Ta-doped Li&lt;sub&gt;7&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt; (LLZO) lithium-ion-conducting ceramic electrolytes has become the promising and critical candidate for developing the high-energy-density all-solid-state lithium batteries, due to the satisfied Li&lt;sup&gt;+&lt;/sup&gt; conductivity, stability against metallic lithium anode, and the feasible preparation under ambient air. Here, to further increase the lithium-ion conductivity of LLZO comparable to that of the commercial organic liquid electrolytes, lithium chloride (LiCl) is effectively introduced to synthesize the garnet-type ceramic electrolytes with the nominal composition (Li&lt;sub&gt;6.5&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;1.5&lt;/sub&gt;Ta&lt;sub&gt;0.5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;)&lt;sub&gt;1-x&lt;/sub&gt;–(LiCl)&lt;sub&gt;x&lt;/sub&gt; (x = 0, 5mol%, 10mol%, 15mol%, 20mol%, and 25mol%) via high-temperature calcination process. The cubic structure with highly conductive performance is confirmed from X-ray diffraction measurement as well as Raman spectra analysis. Structural information is observed according to field emission scanning electron microscope equipped with energy dispersive spectrometer and density measurements. Among above investigated ceramic compositions, the prepared (Li&lt;sub&gt;6.5&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;1.5&lt;/sub&gt;Ta&lt;sub&gt;0.5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;)&lt;sub&gt;0.85&lt;/sub&gt;–(LiCl)&lt;sub&gt;0.15&lt;/sub&gt; ceramic electrolyte sheet sintered at 1200 °C for 12h presents the room-temperature Li-ion conductivity of 1.22 × 10&lt;sup&gt;−3&lt;/sup&gt; S·cm&lt;sup&gt;−1&lt;/sup&gt; by alternating current (AC) impedance analysis along with the corresponding activation energy of 0.262eV through Arrhenius equation calculation. The electronic conductivity measurements are also done by direct-current polarization to confirm the ionic nature for all investigated ceramics. Furthermore, the Li|(Li&lt;sub&gt;6.5&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;1.5&lt;/sub&gt;Ta&lt;sub&gt;0.5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;)&lt;sub&gt;0.85&lt;/sub&gt;–(LiCl)&lt;sub&gt;0.15&lt;/sub&gt; |Li symmetric batteries can possess the small interfacial resistance of 92.3 Ω cm&lt;sup&gt;2&lt;/sup&gt; and stably run for 1000 h at 0.1 mA cm&lt;sup&gt;−2&lt;/sup&gt; without a short circuit at room temperature. The hybridized lithium-sulfur battery with (Li&lt;sub&gt;6.5&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;1.5&lt;/sub&gt;Ta&lt;sub&gt;0.5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt;)&lt;sub&gt;0.85&lt;/sub&gt;–(LiCl)&lt;sub&gt;0.15&lt;/sub&gt; electrolyte delivered excellent initial room-temperature discharge capacity of 1204mAh·g&lt;sup&gt;−1&lt;/sup&gt; and 1152 mAh·g&lt;sup&gt;−1&lt;/sup&gt; under the current density of 0.1C and 0.2C respectively, large coulombic efficiency, and great cycling stability. Moreover, the lithium-sulfur batteries also can show excellent cycling performances under different current densities and a good capacity recoverability. The above investigation results suggest that the low-melting-point LiCl incorporation in Li&lt;sub&gt;6.5&lt;/sub&gt;La&lt;sub&gt;3&lt;/sub&gt;Zr&lt;sub&gt;1.5&lt;/sub&gt;Ta&lt;sub&gt;0.5&lt;/sub&gt;O&lt;sub&gt;12&lt;/sub&gt; electrolyte is an effective measurement to synthesize the cubic and dense Li-stuff garnet ceramic sheets for the high-performance rechargeable next-generation solid-state","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 51055-51064"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700453","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 novel method for strengthening C/C composite joint with high entropy alloy/Ni composite interlayers by spark plasma sintering: In-situ synthesis of high entropy cermet joint structure","authors":"Laifu Wu ,&nbsp;Xincheng Wang ,&nbsp;Xueke Feng ,&nbsp;Ben Chai ,&nbsp;Yue Mao ,&nbsp;Li Fu","doi":"10.1016/j.ceramint.2024.09.402","DOIUrl":"10.1016/j.ceramint.2024.09.402","url":null,"abstract":"<div><div>C/C composite was successfully brazed with TiZrHfTa/Ni or ZrHfNbTa/Ni composite interlayers using spark plasma sintering. The influence of different interlayers and joining parameters on the joint morphology, shear strength at room temperature and 1000 °C was investigated. For both composite interlayers, the C/C joints obtained at 1800 °C for 30 min consisted of a single high entropy cermet structure, with a near equimolar high entropy carbide hard phase and a near pure Ni binder phase. However, the use of different composite interlayers resulted in differences in the elastic modulus and hardness of the formed high entropy carbide phase. The maximum shear strengths of the obtained C/C composite joints using TiZrHfTa/Ni and ZrHfNbTa/Ni interlayers at room temperature were close, with value of 37.49 ± 1.44 MPa and 38.95 ± 1.26 MPa, respectively. Because (Zr-Hf-Nb-Ta)C had better high-temperature stability than (Ti-Zr-Hf-Ta)C, the obtained C/C-ZrHfNbTa/Ni-C/C joint exhibited a higher shear strength of 28.54 ± 1.71 MPa at 1000 °C. After shear testing at both room temperature and 1000 °C, fractures in all joints predominantly occurred within the C/C composite near the reaction layer, indicating a substrate failure mode. The use of composite interlayers resulted in C/C composite joints with excellent shear strength, primarily due to the in-situ synthesized high entropy cermet reaction layer, which provided superior strength and toughness. Additionally, the laser-textured pattern on the C/C composite surface formed numerous interlocking structures at the joint interface, further enhancing the joints' shear strength.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50569-50586"},"PeriodicalIF":5.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700301","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}