International Journal of Applied Ceramic Technology最新文献

{"title":"Effect of photosensitive resins on the properties of vat photopolymerization-based 3D printed alumina ceramics","authors":"Xiaoli Shi,&nbsp;He Li,&nbsp;Paolo Colombo","doi":"10.1111/ijac.70038","DOIUrl":"https://doi.org/10.1111/ijac.70038","url":null,"abstract":"<p>Stereolithography-based three-dimensional printing fabricates objects through ultraviolet-induced layerwise curing of photosensitive resins. This study systematically evaluated alumina ceramic parts fabricated using four distinct photosensitive resin systems. Key parameters including slurry viscosity, debinding/sintering behavior, microstructure, and mechanical properties were analyzed. Rheological tests revealed that ceramic slurries exhibited non-Newtonian fluid characteristics, with viscosity significantly influenced by resin composition. Lumi React Hard &amp; Detailed resin (resin A) produced the lowest slurry viscosity (0.386 Pa s). Directional sintering shrinkage rates for resin A demonstrated minimal anisotropy (9.5%‒16.5%). Post-sintering characterization showed bulk density (1.82‒2.37 g/cm³), porosity (40.3‒56.6 vol%), and bending strength (8.9‒14.6 MPa) variations across resin systems. Resins A and D (standard blends) yielded superior bending strength, correlating with optimized crosslinking and polymerization patterns observed in microstructural analysis. The findings establish resin selection as a critical determinant of ceramic part performance, providing technical guidance for stereolithography-based ceramic manufacturing optimization. This work demonstrates the feasibility of tailoring material properties through photosensitive resin formulation engineering, expanding functional ceramic applications in additive manufacturing.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dry aerosol deposition of barium neodymium titanate microwave dielectric","authors":"Alex Valdez,&nbsp;Paul Fuierer","doi":"10.1111/ijac.70039","DOIUrl":"https://doi.org/10.1111/ijac.70039","url":null,"abstract":"<p>Additive manufacturing is of interest for prototype and integrated RF/microwave components. Low-loss microwave dielectrics (MWDs) are increasingly important in resonant filter and antennae designs as operational frequency increases with millimeter-wave technology. Miniaturization and design flexibility demand higher relative permittivity (<i>ε</i>_r) than is currently available with 3D-printed polymers. This paper describes the use of dry aerosol deposition (DAD) to build thick films of MWD barium neodymium titanate on a variety of substrates including printed circuit board. Films range in thickness from 11 to 150 µm, and cross-sectional imaging reveals a dense, ultrafine grain structure. Dielectric properties are reported over the frequency range 1 kHz–1 GHz. Relative permittivity shows a thickness dependence, with <i>ε</i>_r = 44 for the thickest films. Dielectric loss is reasonably low at midrange frequencies (tan(δ) ∼ 0.01), but increases at the high end of the spectra, likely due to extrinsic effects. Compared to sintered bulk ceramic of the same composition (<i>ε</i>_r = 81, tan(δ) ∼ 0.001), the dielectric properties of the films are impressive considering that DAD is a room temperature process. Results suggest that DAD offers a promising approach for on-demand manufacturing of MWD ceramics for applications in telecom and sensing.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Y2O3 addition on microstructure and mechanical properties of spark plasma sintered TiB2–20SiC–5Ni cermet","authors":"Xuemei Ouyang,&nbsp;Yuling Shi,&nbsp;Hongxian Chen,&nbsp;Weiwei Zhou,&nbsp;Xinming Wang","doi":"10.1111/ijac.70042","DOIUrl":"https://doi.org/10.1111/ijac.70042","url":null,"abstract":"<p>TiB₂–20SiC–5Ni cermets with Y₂O₃ additions ranging from 0 to 1 wt.% were processed via spark plasma sintering (SPS) at 1600°C. The influence of Y₂O₃ additives on the microstructure and composition of cermets was examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The outcomes show that four phases (TiB₂, SiC, TiC, and Ni₂Si) and a characteristic core–rim structure of TiB₂ grains were found in the TiB₂-based cermets. The addition of Y₂O₃ promoted sintering densification, while the Y element showed regional enrichment, effectively inhibiting the overgrowth of the (Ti, W)(C, B)₂ rim phases and promoting TiC precipitation. The addition of Y₂O₃ has significantly improved the mechanical properties of TiB₂-based cermets. The Vickers hardness and fracture toughness of TiB₂–20SiC–5Ni–0.5Y₂O₃ cermet reached up to 16.17 ± 0.25 GPa and 8.2 ± 0.14 MPa m^1/2, individually. Transgranular fracture, deflection, and bridging of cracks were the causes attributed to the toughening mechanisms.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctional silica-based coatings for ceramic tiles: Balancing hydrophobicity and aesthetics","authors":"H. R. Abdi Rokn Abadi,&nbsp;Mohsen Khajeh Aminian,&nbsp;Salar K. Fatah","doi":"10.1111/ijac.70037","DOIUrl":"https://doi.org/10.1111/ijac.70037","url":null,"abstract":"<p>This study investigates the development of multifunctional silica-based coatings for ceramic tiles, aiming to balance hydrophobicity and aesthetic performance. Two coating solutions were employed: one based on silica aerogel and another on silica nanoparticles, both incorporating sodium dodecyl sulfate. The influence of spray counts, silica content, and calcination temperature on surface wettability, optical properties, and coating stability was systematically examined. Optimal coating conditions, achieved with 40‒50 spray counts and calcination at 200°C, resulted in superhydrophobic surfaces with contact angles exceeding 150°. Field emission scanning electron microscopy analysis revealed a strong correlation between surface roughness and wettability, demonstrating the crucial role of nanoparticle size and distribution in achieving high contact angles. The coatings exhibited excellent optical properties, maintaining high whiteness and reflectivity, ensuring minimal impact on the aesthetic appeal of the tiles. Durability testing revealed good air stability, while water immersion resulted in a gradual decrease in contact angle.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strength and thermal stability of enhanced metakaolin-based geopolymer composites with sand and fibers","authors":"Ruy A. Sa Ribeiro,&nbsp;Marilene G. Sa Ribeiro,&nbsp;Devon M. Samuel,&nbsp;Ali Ozer,&nbsp;Prapassorn Numkiatsakul,&nbsp;Waltraud M. Kriven","doi":"10.1111/ijac.70040","DOIUrl":"https://doi.org/10.1111/ijac.70040","url":null,"abstract":"<p>The growing demand for sustainable materials in construction and ceramics has driven interest in geopolymer technology as an eco-friendly alternative to traditional cement-based systems. Geopolymers, synthesized from aluminosilicate precursors like metakaolin, offer high mechanical performance, chemical resistance, and lower carbon footprints. This study presents the development of innovative metakaolin-based geopolymer composites reinforced with natural mineral particles and fibers to enhance mechanical and functional properties while maintaining environmental sustainability. A tailored formulation combining commercial metakaolin, optimized waterglass, and a hybrid reinforcement strategy was employed. Three compositions were evaluated: (1) 20 wt.% ball-milled fine sand and 40 wt.% Prairie fine sand (B20P40); (2) B20P40 with 5 wt.% basalt fibers (B20P40Bas5); and (3) B20P40 with 5 wt.% bamboo fibers (B20P40Bam5). The composites demonstrated flexural strengths of 12.1, 17.1, and 14.6 MPa, respectively, with corresponding apparent densities of 1.93, 1.88, and 1.81 g/cm³. Incorporation of natural fibers improved strength, ductility, and thermal stability, while reducing density, water absorption, and pore volume. The results indicate that these fiber-reinforced geopolymer composites are promising candidates for sustainable construction and ceramic applications, offering a viable path toward high-performance, low-impact building materials.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/ijac.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Effect of TiB2 on properties and microstructure of Si3N4-TiB2 ceramics sintered at lower temperature","authors":"Kai Meng,&nbsp;Chuanzhen Huang,&nbsp;Zhenyu Shi,&nbsp;Longhua Xu,&nbsp;Zhen Wang,&nbsp;Shuiquan Huang,&nbsp;Meina Qu,&nbsp;Zhengkai Xu,&nbsp;Dijia Zhang,&nbsp;Baosu Guo,&nbsp;Hanlian Liu,&nbsp;Dun Liu,&nbsp;Peng Yao","doi":"10.1111/ijac.70032","DOIUrl":"https://doi.org/10.1111/ijac.70032","url":null,"abstract":"<p>Si₃N₄ is a low thermal expansion, high-performance structural ceramic that is widely used in extreme environments. However, the excessively high sintering temperatures required for densification limit further applications and the improvement of mechanical properties. In the present study, a high-performance Si₃N₄-TiB₂ ceramic was fabricated at a lower sintering temperature. The effect of TiB₂ content, sintering temperature, and holding time on the microstructure, mechanical properties, grain size distribution, and fracture surface energy of the ceramic was systematically investigated. The results showed that the TiB₂ addition primarily improves the ceramic's properties by reducing the porosity defects and improving the densification and grain boundary adhesion strength. When the TiB₂ content is 9 Vol%, the Si₃N₄-TiB₂ ceramic exhibits optimal mechanical properties. The Vickers hardness, fracture toughness, and flexural strength were 16.7 ± 0.3 GPa, 8.0 ± 0.15 MPa·m^1/2, and 655 ± 13 MPa. In addition, the TiB₂ addition can reduce the densification temperature of Si₃N₄-TiB₂ ceramic, enhance the densification of the ceramic, refine the grain structure, improve the grain distribution of the Si₃N₄-TiB₂ ceramic, and notably improve the material hardness and fracture toughness. The toughening mechanisms in the Si₃N₄-TiB₂ ceramic are the synergistic effects of crack deflection, transgranular fracture, grain pull-out, and grain bridging.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sintering and characterization of additive-free B4C/SiCw composites using high-pressure techniques","authors":"Branko Matović,&nbsp;Vladimir Urbanovich,&nbsp;G. Chinni Sai Mohan Babu,&nbsp;Jelena Maletaskic,&nbsp;Aleksa Lukovic,&nbsp;Jelena Ercic,&nbsp;Ravi Kumar","doi":"10.1111/ijac.70036","DOIUrl":"https://doi.org/10.1111/ijac.70036","url":null,"abstract":"<p>Dense B₄C-based ceramics reinforced with SiC whiskers (SiC_w) were successfully fabricated via high-pressure (4 GPa) and high-temperature sintering at 1650°C and 1850°C without any sintering additives. Composites containing 2.5–10 wt.% SiCw were systematically investigated to assess the influence of whisker content and sintering temperature on microstructure, densification, mechanical properties, and thermal diffusivity. Results showed that increasing SiCw content initially improved mechanical performance; however, excessive whisker addition caused a decline in both hardness and fracture toughness due to whisker agglomeration and microstructural inhomogeneities. The composite with 5 wt.% SiCw sintered at 1850°C exhibited the optimal balance, achieving the highest relative density (99.25%), Vickers hardness (30.97 GPa), and fracture toughness (3.24 MPa m^1/2). This sample demonstrated the most stable thermal diffusivity at elevated temperatures, with minimal degradation from room temperature up to 1400°C. Conversely, the 10 wt.% SiCw composite sintered at 1650°C showed the highest thermal diffusivity at room temperature (18.5 mm²/s) but suffered from reduced thermal stability at elevated temperatures. These findings underscore the crucial role of SiC whisker content and sintering conditions in tailoring the interplay between mechanical strength and thermal transport in B₄C-based ceramics, providing valuable insights for their application in extreme environments.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 and processing optimization of magnesium-calcium refractory aggregates","authors":"Kaiyue Meng,&nbsp;Xiaowen Wu,&nbsp;Ligang Zheng,&nbsp;Lingxue Wang,&nbsp;Xin Min,&nbsp;Minghao Fang,&nbsp;Zhaohui Huang","doi":"10.1111/ijac.70023","DOIUrl":"https://doi.org/10.1111/ijac.70023","url":null,"abstract":"<p>Magnesium-calcium refractory aggregates with a low water absorption rate were prepared by using high-temperature sintering of light-burned dolomite, magnesite, with polyvinyl alcohol as the binder. The effects of CaO content, slaking process, and sintering parameters on the microstructure and properties were thoroughly investigated. When the CaO content was 40 wt%, light-burned dolomite was slaked with the addition of 30 wt% water for 2 h, followed by sintering at 1600°C for 3 h, the overall properties of the magnesium-calcium refractory aggregates were optimal, achieving a linear shrinkage rate of 20.93%, a bulk density of 3.32 g/cm³, an apparent porosity of 5.02%, compressive strength of 213.73 MPa, flexural strength of 86.84 MPa, and a residual strength retention ratio of 92.12% after three thermal shocks. Additionally, the absorption rate was low at 0.52% after treatment for 72 h at constant temperature and humidity (RH = 99%, <i>T</i> = 21°C).</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 and properties of geopolymer recycled concrete: A review of recent developments","authors":"Gongjie Li,&nbsp;Wenjiao Zhang,&nbsp;Tao Chen,&nbsp;Xiangqing Kong","doi":"10.1111/ijac.70033","DOIUrl":"https://doi.org/10.1111/ijac.70033","url":null,"abstract":"<p>Geopolymer recycled aggregate concrete (GRAC) is an eco-friendly building material. The raw materials for preparing GRAC typically include industrial solid waste rich in silica-alumina elements as a substitute for cement, along with recycled aggregates (RA) derived from processed waste concrete or construction debris. These materials undergo geopolymerization through activation with alkaline or acid solutions. The development of GRAC can effectively address environmental issues. However, the incorporation of RA leads to the formation of multiple interfacial structures within the concrete matrix, along with micro-cracks generated during the crushing process of RA, significantly impacting the practical use of GRAC. This review systematically evaluating the fresh properties, mechanical properties (including compressive strength, tensile strength, flexural strength, and elastic modulus), and durability (involving resistance to chloride ion penetration, acid and sulfate attack, high temperature and freeze–thaw cycle) of GRAC. Furthermore, a comparative evaluation method based on the carbon emissions of concrete per unit strength is suggested to assess the carbon emissions performance of GRAC against traditional cement concrete. Building upon existing literature, future research directions for GRAC are suggested, providing theoretical guidance for the utilization of RA in geopolymers and facilitating the practical application of GRAC in the sustainable green building industry.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating oxide and boride chemistries for mitigating CMAS corrosion and infiltration","authors":"Andrew J. Wright,&nbsp;Clara Mock,&nbsp;Troy Ansell,&nbsp;Timothy Sharobem,&nbsp;Robert Slapikas,&nbsp;Chris Dambra,&nbsp;Brian Keyes,&nbsp;Anindya Ghoshal","doi":"10.1111/ijac.70029","DOIUrl":"https://doi.org/10.1111/ijac.70029","url":null,"abstract":"<p>This study investigates the interactions between calcia-magnesia-alumino-silicate (CMAS) glass and seven T/environmental barrier coating (EBC) materials, including five oxides—7YSZ, Gd₂O₃, Yb₂Si₂O₇, (Y_1/2Yb_1/2)₂Si₂O₇, and (Y_1/2Yb_1/2)₂SiO₅—and two borides, ZrB₂ and HfB₂. Ex situ powder X-ray diffraction on oxide–CMAS pellets elucidated the crystalline products formed at 1350°C and revealed apatite and disilicate phases in Gd₂O₃, (Y_1/2Yb_1/2)₂Si₂O₇, and (Y_1/2Yb_1/2)₂SiO₅, but no reaction in 7YSZ or Yb₂Si₂O₇. Complementary diffusion couple experiments at the same temperature evaluated CMAS infiltration kinetics, reaction product formation, and microstructural changes. Results show the critical role of rare earth concentration and cation size along with the importance of Ca/Si ratio in the glass in determining CMAS resistance. After a 36 h anneal at 1350°C, 7YSZ and Yb₂Si₂O₇ showed significant CMAS infiltration (∼1 mm) due to the absence of reactive products, while Gd₂O₃, (Y_1/2Yb_1/2)₂Si₂O₇, and (Y_1/2Yb_1/2)₂SiO₅ demonstrated reduced infiltration (∼50 µm), attributed to the formation of dense apatite and garnet protective reaction layers. Borides exhibited CMAS interaction proportional to their substantial oxidation, which emphasizes the necessity for oxidation resistant coatings to realize their potential. This analysis provides insights into CMAS–ceramic interactions and establishes a framework for designing resilient coatings to enhance the durability of next-generation gas turbine engines.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}