Ceramics International最新文献

{"title":"Microstructure and magnetic properties of Fe-Al2O3 nanocomposites prepared by a versatile facile combustion-based route","authors":"Deyin Zhang ,&nbsp;Jiaxun Zhang ,&nbsp;Yixiao Wu ,&nbsp;Tianyu Lu ,&nbsp;Haoyang Wu ,&nbsp;Baorui Jia ,&nbsp;Mingli Qin ,&nbsp;Xuanhui Qu","doi":"10.1016/j.ceramint.2024.11.452","DOIUrl":"10.1016/j.ceramint.2024.11.452","url":null,"abstract":"<div><div>Fe-Al₂O₃ nanocomposites with Al₂O₃ nanoparticles uniformly dispersed have been successfully prepared via a versatile facile and scalable combustion-based route with two steps. Firstly, the homogenous mixed oxide precursor composed with α-Fe₂O₃, γ-Fe₂O₃ and Al₂O₃ was prepared by solution combustion synthesis. Subsequently, Fe-Al₂O₃ nanocomposites with Al₂O₃ nanoparticles evenly dispersed were prepared by hydrogen reduction of the mixed oxide precursor. The effects of the various reduction temperatures on the phase composition, morphology, grain size and magnetic properties of the Fe-Al₂O₃ nanocomposites were investigated in details. The results show that the Fe-Al₂O₃ nanocomposites prepared at as low as 400 °C present a connected network structure with an average grain size of about 17 nm, which have a saturation magnetization of 125.3 emu/g, and a coercivity of 721.2 Oe. With the increase of reduction temperature, the average grain size, and saturation magnetization of the Fe-Al₂O₃ nanocomposites increase gradually, while the coercivity decrease. When the reduction temperature is increased to 500 °C and 600 °C, the grain size increases to about 27 nm and 37 nm, the saturation magnetization increases to 153.6 emu/g and 177.1 emu/g, and the coercivity decreases to 634.6 Oe and 467.8 Oe, respectively.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 4","pages":"Pages 4780-4785"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143235791","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":"Fabrication of self-healing and high strength alumina/glass composite by infiltration route and its application for repairing cracks in dense ceramic","authors":"Mu Tang ,&nbsp;Weiwei Zhu ,&nbsp;Haohao Zou ,&nbsp;Guoqing Zu ,&nbsp;Ying Han ,&nbsp;Xu Ran","doi":"10.1016/j.ceramint.2024.11.453","DOIUrl":"10.1016/j.ceramint.2024.11.453","url":null,"abstract":"<div><div>In this work, Dy₂O₃-Al₂O₃-SiO₂ glass was used to infiltrate dense alumina ceramics for fabricating alumina/glass composites. At the infiltration temperature of 1450–1500 °C, the infiltration only occurred along the three or multi-grain junctions. When the infiltration temperature reached 1550 °C, the glass was uniformly distributed at the grain boundaries of alumina ceramics. The obtained composites exhibited an optimal flexural strength of 525±25 MPa and a fracture toughness of 5.87 MPa·m^1/2. Moreover, the composites demonstrated excellent thermal shock resistance and self-healing characteristics. After undergoing two cycles of thermal shock treatment from 4 °C to 800 °C, the composites still maintained a flexural strength of 118±15 MPa. Heat treatment of the composites with cracks at 1450 °C for 2 h could restore their mechanical properties to levels comparable to those before thermal shock. Meanwhile, this method can also be applied to repair cracked alumina ceramics. The flexural strength of the repaired alumina ceramics was up to 623±30 MPa.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 4","pages":"Pages 4786-4797"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143235792","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":"Modeling of temperature-dependent first matrix cracking stress in ceramic matrix composites considering fracture surface energy and residual thermal stress","authors":"Dahui Yu,&nbsp;Yi He,&nbsp;Zhou Li","doi":"10.1016/j.ceramint.2024.12.011","DOIUrl":"10.1016/j.ceramint.2024.12.011","url":null,"abstract":"<div><div>Ceramic matrix composites have shown excellent performance in fields such as hypersonic vehicles, and their matrix cracking stress is an important criterion for determining whether damage has occurred in composites, but obtaining the first matrix cracking stress at elevated temperatures is very difficult. In this study, a temperature-dependent theoretical model of first matrix cracking stress considering fracture surface energy and residual thermal stress for ceramic matrix composites was developed based on the Force-Heat Equivalence Energy Density Principle. The model successfully captures the quantitative relationship between the first matrix cracking stress and parameters such as temperature and Young's modulus. Without the need to carry out any high-temperature destructive experiments, the developed model can easily predict the temperature-dependent first matrix cracking stresses of the material. The validation shows that the model predictions achieve good agreement with the experimental data at different temperatures (from 293K to 1673K), and the predictions of the developed model have higher accuracy compared to the two commonly used theoretical models. In addition, the effect of fracture surface energy on matrix cracking stress at different temperatures was quantitatively analyzed. The research results provide a non-destructive method for obtaining the first matrix cracking stress of materials at elevated temperatures.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5639-5645"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323539","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":"HA and Fe-based alloy amorphous composite coating on the surface of degradable magnesium alloy","authors":"Yaxuan Liu ,&nbsp;Xiangyun Zhang ,&nbsp;Danqiang Huang ,&nbsp;Zizhou Yuan","doi":"10.1016/j.ceramint.2024.12.031","DOIUrl":"10.1016/j.ceramint.2024.12.031","url":null,"abstract":"<div><div>HA and Fe-based amorphous composite coatings containing different proportions of hydroxyapatite were prepared on the surface of ZK60A magnesium alloy by high-velocity oxygen-fuel (HVOF) spraying. The microstructure, microhardness, and wettability of the coatings were systematically examined to identify the composite coating with optimal properties. The evolutionary behavior of the corrosion products of each coating at different time stages was analyzed by immersion experiments, and the degradation rate was calculated by counting the mass loss. The degradation rate of the optimal composite coating (0.0468 mm/year) is lower than the degradation rate of the pure Fe-based amorphous coating (0.0936 mm/year). Electrochemical tests and in vitro cell culture experiments indicate that, in simulated body fluid, Fe-based amorphous composite coatings with a certain proportion of HA exhibit better corrosion resistance and biocompatibility compared to Fe-based amorphous coatings. These results provide some insights into the development of Fe-based amorphous composite coatings for potential biomedical applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5857-5869"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323605","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":"Anomalous dielectric and magnetic behavior induced by the orthorhombic-cubic phase transition in high-entropy perovskite ceramics","authors":"Hao Zheng ,&nbsp;Xiaoyu Li ,&nbsp;Yaohang Gu ,&nbsp;Yi Zhang ,&nbsp;Xiaoyan Zhang ,&nbsp;Xiwei Qi","doi":"10.1016/j.ceramint.2024.12.093","DOIUrl":"10.1016/j.ceramint.2024.12.093","url":null,"abstract":"<div><div>High-entropy materials containing five or more metal cations provide a versatile platform for optimizing physical properties through targeted cation design. This study synthesized (Bi_0.2Sm_0.2Eu_0.2Dy_0.2Tb_0.2)FeO₃ ceramic using the conventional solid-state method and investigated its temperature-induced phase transitions. The dielectric constant was greatly enhanced from approximately 2 × 10³ to 1.2 × 10⁴. This growth occurred during phase transitions without compromising dielectric performance due to charge compensation by oxygen vacancies. Furthermore, saturation magnetization increased from 0.53 to 2.08 emu·g⁻¹ with elevating sintering temperatures. These findings offer valuable insights into modulating the electrical and magnetic properties of BiFeO₃-based high-entropy ceramics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6496-6505"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323608","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":"Preparation of silicate glass-ceramics nuclide solidified body using asbestos tailings and coal fly ash and solidification mechanism","authors":"Shize Chen ,&nbsp;Liming Luo ,&nbsp;Hongjuan Sun ,&nbsp;Tongjiang Peng ,&nbsp;Jie Lei ,&nbsp;Jin Yang ,&nbsp;Zijun Xian","doi":"10.1016/j.ceramint.2024.12.091","DOIUrl":"10.1016/j.ceramint.2024.12.091","url":null,"abstract":"<div><div>Industrial solid waste poses serious risks to the human living environment and health owing to its diversity and complexity. In this work, asbestos tailings and coal fly ash were used as raw materials, and the trivalent actinide nuclide was simulated using Nd₂O₃. The silicate glass-ceramics nuclide solidified body was successfully prepared through melting, water quenching, and sintering methods. The properties of the solidified body and the solidification mechanism of the nuclide were studied via X-ray diffraction, Scanning electron microscope-energy dispersive spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and Atomic pair distribution function analysis. The results showed that the solidified body prepared via the molten water quenching–sintering method exhibited a unique microcrystalline structure, with properties that were significantly superior to those of traditional glass solidified bodies. Increasing the amount of Nd₂O₃ further enhanced the stability of the solidified body. However, when the amount of Nd₂O₃ exceeded 22 wt%, both the compressive strength and bulk density of the sample decreased. Therefore, the optimal package capacity of the solidified body for the nuclide Nd was 22 wt%. The leaching experiment demonstrated that the normalised leaching rate of Nd stabilised after 14 d and reached the order of 10⁻⁵ g m⁻² d⁻¹ after 42 d, which indicated that the solidified body had excellent curing ability for nuclides. Analysis of the glass network structure revealed that Nd elements formed short-range ordered structures with Al, Si, Mg, O, and other elements through non-bridging oxygen bonds, thus becoming fixed in the amorphous phase of the solidified body. When the amount of Nd₂O₃ exceeded 20 wt%, some short-range ordered structures containing Nd transitioned to form long-range ordered structures, which were stabilised in the crystal phase through lattice solidification. Overall, this study provides an experimental and theoretical basis for the solidification of highly radioactive nuclides using industrial solid waste.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6468-6480"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323638","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":"Analysis of microsturcture evolution and mechanical properties in zirconia ceramic joints brazed by bismuth based glass","authors":"Jingru Xin ,&nbsp;Xinlei Ding ,&nbsp;Wei Guo ,&nbsp;Xinrong Li ,&nbsp;Kaizhi Yan ,&nbsp;Yuxin Wang","doi":"10.1016/j.ceramint.2024.12.044","DOIUrl":"10.1016/j.ceramint.2024.12.044","url":null,"abstract":"<div><div>The ZrO₂ ceramics was successfully brazed by the newly designed bismuth-borate glass. The mechanism which is influenced by holding time and cooling rate on morphology and mechanical performance of joints were thoroughly analyzed under 675 °C. The study introduced an innovative bismuth-borate glass composition as the brazing material, providing an effective solution for high-strength joint formation in ZrO₂ ceramics. The findings showed that when brazing temperature was 675 °C, well-formed joints were obtained under 0–90 min and cooling rate range of air cooling or slower, whiskers of Al₄B₂O₉ and crystals of Al₅BO₉ were observed in the joints, with their number and size increasing as the holding time extended and the cooling rate decreased. Systematic analysis demonstrated that the optimized process parameters, including a holding time of 30 min and a controlled cooling rate of 3 °C/min, resulted in a maximum shear strength of 83 MPa. The joint formed under these conditions was a reinforced composite consisting of aluminum borate crystals. The joint of ZrO₂ ceramics brazed with Bismuth oxide-Boron oxide-Aluminium oxide (50Bi₂O₃-45B₂O₃-5Al₂O₃) glass is the reinforced composite joint consisting of aluminum borate crystals.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 5977-5986"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323777","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":"Effect of ZrO2-MoO3 on the properties of in situ synthesized corundum-mullite composite thermal storage ceramics","authors":"Yaqiang Shen,&nbsp;Xiaohong Xu,&nbsp;Jianfeng Wu,&nbsp;Jiaqi Yu,&nbsp;Saixi Qiu,&nbsp;Deng Zhang","doi":"10.1016/j.ceramint.2024.12.056","DOIUrl":"10.1016/j.ceramint.2024.12.056","url":null,"abstract":"<div><div>Based on the requirements for solar thermal storage materials, thermal storage ceramics must possess not only excellent thermal storage and thermal conductivity but also high strength and thermal shock resistance. This study investigates the effects of zirconia-molybdenum oxide composite additives on the properties of corundum-mullite composite ceramics. It has been shown that at high temperatures, the solid solution formed by the reaction between MoO₃ and Al₂O₃ decomposes to generate highly reactive nano-sized alumina grains, which not only promote the densification process of the matrix but also act as a second phase to form an “intragranular” structure within the corundum grains. The “intragranular” structure, along with the presence of added zirconia, significantly enhances the mechanical and thermal shock resistance of the samples. After sintering at 1650 °C, the water absorption, porosity, bulk density, bending strength, thermal conductivity, and thermal storage density of the C3 sample containing 4 wt% ZrO₂ and 3 wt% MoO₃ were measured as 0.26 %, 0.93 %, 3.55 g/cm³, 245.06 MPa, 10.13 W (m K)⁻¹ (25 °C), and 1363.54 kJ kg⁻¹ (1000 °C). After undergoing 30 thermal shocks, the bending strength of the C3 sample increased by 9.13 %, reaching 267.44 MPa.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6110-6124"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323779","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 luminescence in Eu3+-doped glass-ceramic derived from black talc: A novel approach for advanced W-LED lighting applications","authors":"Gan Wan ,&nbsp;Lei Han ,&nbsp;Zongliang Xiao","doi":"10.1016/j.ceramint.2024.11.515","DOIUrl":"10.1016/j.ceramint.2024.11.515","url":null,"abstract":"<div><div>In the realm of advanced luminescent materials, glass-ceramic (GC) incorporated into rare earth (RE) represents a promising candidate. However, their practical application has been constrained by limitations in luminescence efficiency and thermal stability. This study overcomes these challenges by introducing a novel Eu³⁺-doped black talc GC with enhanced optical characteristics. Our method involved fabricating a new glass matrix and incorporating heavy concentrations of Eu³⁺ ions. Following a precise nucleation-crystallization process, CaMgSi₂O₆ nanoscale crystals were uniformly dispersed within the GCs matrix, markedly enhancing its luminescent properties. When excited by 394 nm light, this GC achieved a notable internal quantum efficiency (IQE) of 88.97 %, surpassing many traditional Eu³⁺-doped glasses and GCs. Furthermore, it retained 89.6 % of its luminescence intensity even at 100 °C, indicating remarkable thermostability. To validate the GC's practical utility, we integrated this material into a white light-emitting diode (W-LED) component, incorporating a LED chip, CaMgSi₂O₆: Eu³⁺ GC, BaMgAl₁₀O₁₇: Eu²⁺, and Ba₂SiO₄: Eu²⁺ phosphor. The fabricated device demonstrated excellent chromaticity coordinates of (0.3493, 0.3935), a correlated color temperature (CCT) of 4976K, and a prominent color rendering index (CRI) of 90.3. This research not only expands the potential applications of black talc, but the prepared GCs also exhibit excellent performance in luminescence properties, highlighting the broad application of this Eu³⁺-doped GCs in W-LED lighting technology.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6133-6144"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323780","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":"Evolution of residual stress of SiCf/Ti17 composites at high temperature evaluated by micro-Raman spectroscopy","authors":"Jiahao Li ,&nbsp;Runlai Peng ,&nbsp;Yao Zhao ,&nbsp;Hongye Zhang","doi":"10.1016/j.ceramint.2024.12.063","DOIUrl":"10.1016/j.ceramint.2024.12.063","url":null,"abstract":"<div><div>SiC_f/Ti17 composites are considered promising lightweight high-temperature structural materials for the aerospace field due to their excellent mechanical properties. However, during the manufacturing process, differences in the coefficients of thermal expansion between various material components inevitably generate thermal residual stresses at the interfaces. These thermal residual stresses can lead to stress concentration and other failure modes, thereby affecting the mechanical properties of SiC_f/Ti17 composites. Therefore, it is crucial to systematically study the residual stresses in the interfacial C coating and the W/SiC interfacial regions, as well as the evolution of these stresses at high temperatures. In this study, samples were first subjected to vacuum heat treatment, followed by systematic micro-Raman experiments conducted radially on the fibers. Subsequently, the Raman spectra were subjected to peak deconvolution to obtain precise target peaks. By combining Raman peak shifts with Hooke's law, the evolution of high temperature residual stresses in the C coating and W/SiC interfacial regions were determined. Additionally, changes in the Raman spectral data at different temperatures were analyzed to investigate the variations in the micro-composition of different regions. The results showed that at 850 °C, both the C coating and the W/SiC interfacial region exhibited good mechanical properties and strength retention. However, at 1050 °C, the mechanical properties of both regions gradually deteriorated, with the W/SiC interfacial region showing a sharp increase in compressive stress. At this point, the SiC_f/Ti17 composite material may face a risk of failure.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 5","pages":"Pages 6195-6205"},"PeriodicalIF":5.1,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143323798","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}