Journal of the Australian Ceramic Society最新文献

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From magnesite tailings to high quality sintered magnesia: role of sintering kinetics 从菱镁矿尾矿到高质量烧结氧化镁:烧结动力学的作用
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-03-18 DOI: 10.1007/s41779-026-01360-x
Jiachen Qin, Chi Zhou, Jian Luan, Chunyan Wang, Shushan Wang
{"title":"From magnesite tailings to high quality sintered magnesia: role of sintering kinetics","authors":"Jiachen Qin,&nbsp;Chi Zhou,&nbsp;Jian Luan,&nbsp;Chunyan Wang,&nbsp;Shushan Wang","doi":"10.1007/s41779-026-01360-x","DOIUrl":"10.1007/s41779-026-01360-x","url":null,"abstract":"<div><p>To mitigate magnesite tailings and effectively utilize natural magnesite ores, the sintering behavior of magnesia obtained from flotation magnesite was investigated. The influence, on sintering properties and microstructures, of sintering temperature of flotation magnesite, and sintering schedule of magnesia were studied. The sintering mechanism of magnesia was assessed via dynamic analysis. The results indicate that temperature has a much greater impact than holding time on the sintering of magnesia. The dominant sintering mechanism changes from volume diffusion to grain boundary diffusion with the increase in sintering temperature. As a result, pore migration and expulsion along grain boundaries were favored, leading to the densification. A bulk density of 3.43 g/cm<sup>3</sup> was successfully achieved using flotation magnesite. At this point, the activation energy for grain growth is only 69.6KJ/mol.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1845 - 1857"},"PeriodicalIF":2.6,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310230","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}
引用次数: 0
Experimental and numerical evaluation of size dependent strength in fused silica ceramics 熔融石英陶瓷尺寸依赖性强度的实验与数值评价
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-03-18 DOI: 10.1007/s41779-026-01364-7
Şeyma Saliha Fidan, Rahmi Ünal
{"title":"Experimental and numerical evaluation of size dependent strength in fused silica ceramics","authors":"Şeyma Saliha Fidan,&nbsp;Rahmi Ünal","doi":"10.1007/s41779-026-01364-7","DOIUrl":"10.1007/s41779-026-01364-7","url":null,"abstract":"<div>\u0000 \u0000 <p>Ceramic materials exhibit brittle behaviour, which limits their use as structural elements under tensile loading. Bending and indirect tensile tests are commonly used to evaluate the mechanical properties of ceramics. Each test produces different stress fields within the specimen, and these effects can be analysed using Weibull statistical theory. This study evaluates the influence of different testing methods and effective volume on the mechanical strength of slip-cast fused silica ceramics by integrating Weibull statistical analysis with micro-CT-based defect characterization and finite element method (FEM) simulations. Although previous studies have examined three-point bending, four-point bending, and Brazilian tests individually, this study integrates these methodologies to provide a comprehensive understanding of size effects and microstructural influences on mechanical behaviour. A FEM-based computational approach was developed to determine the effective volumes of the specimens, and results obtained from analytical and numerical methods were compared. The Weibull modulus was approximately 9 and showed increased consistency with a total of 50 samples. While Weibull modulus values remained similar across test methods, significant differences were observed in characteristic strengths, mainly due to variations in effective volume. Larger effective volumes resulted in lower strength because of the higher probability of critical defects. The intrinsic strength, independent of stress state and specimen geometry, remained consistent for all tests. Furthermore, the study demonstrates that the effective volume calculation procedure based on numerical analysis can be applied to complex test geometries and various loading conditions, establishing a direct relationship between testing methods, specimen geometry, and size effects.</p>\u0000 </div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1911 - 1936"},"PeriodicalIF":2.6,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-026-01364-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310229","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}
引用次数: 0
Properties of rice husk ash-based geopolymer slurry-infiltrated fiber concrete with various steel fiber types and contents 不同钢纤维类型和掺量稻壳灰基地聚合物浆料浸润纤维混凝土的性能
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-03-12 DOI: 10.1007/s41779-026-01359-4
Mohammed Ali Abdulrehman, Khairunisak Abdul Razak, Shah Rizal Kasim, Khalid Mershed Eweed
{"title":"Properties of rice husk ash-based geopolymer slurry-infiltrated fiber concrete with various steel fiber types and contents","authors":"Mohammed Ali Abdulrehman,&nbsp;Khairunisak Abdul Razak,&nbsp;Shah Rizal Kasim,&nbsp;Khalid Mershed Eweed","doi":"10.1007/s41779-026-01359-4","DOIUrl":"10.1007/s41779-026-01359-4","url":null,"abstract":"<div><p>Owing to its high fiber content, slurry-infiltrated fiber concrete (SIFCON) is renowned for its remarkable mechanical performance. However, problems related to the environmental impact and reliance on Portland cement persist. This study investigated the feasibility of using rice husk ash (RHA) as a sustainable binder in the geopolymer SIFCON in combination with various types and concentrations of steel fibers. Because of its controlled combustion at 600 °C, RHA offers significant energy savings compared to traditional cement production. Numerous mechanical and physical tests have been conducted, including compressive strength, flexural strength, splitting tensile strength, impact resistance, abrasion resistance, density, and water absorption tests. In addition, non-destructive tests, such as ultrasonic pulse velocity (UPV) and rebound hammer tests, were conducted. The results showed that the highest compressive strength (49.2 MPa) was obtained by adding 10% micro steel fibers, whereas the best flexural and splitting strengths (19.8 MPa and 6.1 MPa, respectively) were obtained by adding 10% hooked-end fibers. RHA effectively reduced CO₂ emissions while maintaining the required durability by substituting cement. This study highlights the potential of the RHA-based geopolymer SIFCON as an eco-friendly replacement for high-performance structural applications in the building sector.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1831 - 1844"},"PeriodicalIF":2.6,"publicationDate":"2026-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310398","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}
引用次数: 0
Effect of calcium silicate-based materials on tooth discolouration in repairing root perforations of lower molars: an in-vitro study 硅酸钙基材料对修复下磨牙牙根穿孔牙齿变色的影响:一项体外研究
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-03-11 DOI: 10.1007/s41779-026-01369-2
Sevil Zırhlı, Davut Celık, Tugba Kosar
{"title":"Effect of calcium silicate-based materials on tooth discolouration in repairing root perforations of lower molars: an in-vitro study","authors":"Sevil Zırhlı,&nbsp;Davut Celık,&nbsp;Tugba Kosar","doi":"10.1007/s41779-026-01369-2","DOIUrl":"10.1007/s41779-026-01369-2","url":null,"abstract":"<div><p>This study aimed to compare the effects of four calcium-silicate-based materials (Biodentine, Bio-C Repair, EndoCem MTA Premixed, NeoPutty) on tooth colour change in perforation repair to identify the most suitable option for aesthetically critical areas. Eighty five extracted two-rooted mandibular molars were used. Roots were sectioned 2 mm below the furcation, access cavities prepared, and buccal dentin thickness standardized to 2.5–3 mm. A 1.4 mm furcal perforation was then created in each sample. The control group (<i>n</i> = 5) received no repair material, while the experimental groups (<i>n</i> = 20; groups 1–4) were treated with Biodentine, Bio-C Repair, EndoCem MTA Premixed and NeoPutty, respectively. Colour was assessed with a spectrophotometer at baseline, 1 week, 1, 3, 6 months. ΔE and ΔL values were analyzed using One-Way ANOVA followed by the Tukey’s test (<i>p</i> &lt; 0.005). At 3 and 6 months, ΔE values of Group 3 (EndoCem MTA Premixed) and Group 4 (NeoPutty) were significantly higher than those of Group 1 (Biodentine) and the control group (<i>p</i> &lt; 0.005). CIEDE2000 ΔE00 analyses confirmed that Groups 3 (EndoCem MTA Premixed) and 4 (NeoPutty) caused a significantly greater color change across all time periods compared to other groups. Biodentine and Bio-C Repair caused significantly less staining than EndoCem MTA Premixed and NeoPutty, making them more suitable options for perforation repair in aesthetically critical areas.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1995 - 2003"},"PeriodicalIF":2.6,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-026-01369-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309919","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}
引用次数: 0
Concurrent enhancement of structural, electrochemical, and biological performance in Ag/Zn co-doped hydroxyapatite coatings on Ti-6Al-4 V prepared via sol–gel method 溶胶-凝胶法制备ti - 6al - 4v表面Ag/Zn共掺杂羟基磷灰石涂层结构、电化学和生物性能的同时增强
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-03-09 DOI: 10.1007/s41779-026-01371-8
Qamar Abuhassan, Ahmed Aldulaimi, Omayma Salim Waleed, G. PadmaPriya, S. Supriya, Subhashree Ray, Renu Sharma, Saodatkhon Ibragimova, Z. Saripova, Doniyor Jumanazarov, ‎Aseel Smerat‎
{"title":"Concurrent enhancement of structural, electrochemical, and biological performance in Ag/Zn co-doped hydroxyapatite coatings on Ti-6Al-4 V prepared via sol–gel method","authors":"Qamar Abuhassan,&nbsp;Ahmed Aldulaimi,&nbsp;Omayma Salim Waleed,&nbsp;G. PadmaPriya,&nbsp;S. Supriya,&nbsp;Subhashree Ray,&nbsp;Renu Sharma,&nbsp;Saodatkhon Ibragimova,&nbsp;Z. Saripova,&nbsp;Doniyor Jumanazarov,&nbsp;‎Aseel Smerat‎","doi":"10.1007/s41779-026-01371-8","DOIUrl":"10.1007/s41779-026-01371-8","url":null,"abstract":"<div><p>This study focuses on the development of silver (Ag) and zinc (Zn) co-doped hydroxyapatite (HAP) coatings deposited on Ti-6Al-4 V substrates using a sol-gel technique to enhance the performance of orthopedic implants. XRD and FTIR analyses confirmed that the hexagonal HAP structure was maintained, indicating the successful incorporation of Ag<sup>+</sup> and Zn<sup>2+</sup> ions without inducing secondary phases. FESEM and EDX characterization revealed a composition-dependent surface morphology, with the Ag/Zn coatings exhibiting an improved, uniform, and pore-free surface. The 3Ag/4Zn coating demonstrated superior adhesion strength (43.18 ± 1.17 MPa), retaining ~ 92% of its integrity after 12 days in simulated body fluid (SBF). Electrochemical impedance spectroscopy (EIS) identified this composition as having the highest charge-transfer resistance (3.17 MΩ × cm<sup>2</sup>), underscoring its exceptional enhanced corrosion resistance and barrier stability. XPS spectra further verified the successful incorporation of Ag<sup>+</sup> and Zn<sup>2+</sup> into the HAP lattice and the presence of hydroxylated surface groups favorable for cell attachment. In vitro biological assessments with MG-63 osteoblast-like cells showed excellent in vitro cytocompatibility and enhanced cell viability (113% after 72 h) for the 3Ag/4Zn coating, attributed to the combined effect of the dopant ions. These results collectively introduce Ag/Zn co-doping, particularly the 3Ag/4Zn formulation, as a highly promising strategy for creating multifunctional, load-bearing implants with improved structural, electrochemical, and biological properties.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"2013 - 2028"},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309917","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}
引用次数: 0
Study on process and parameter optimization of selective laser sintering of PF-coated Al2O3 composite 选择性激光烧结pf包覆Al2O3复合材料的工艺及参数优化研究
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-03-09 DOI: 10.1007/s41779-026-01365-6
Jian Li, Guoliang Liu, Wen Zhao, Pengfei Du, Yanling Guo
{"title":"Study on process and parameter optimization of selective laser sintering of PF-coated Al2O3 composite","authors":"Jian Li,&nbsp;Guoliang Liu,&nbsp;Wen Zhao,&nbsp;Pengfei Du,&nbsp;Yanling Guo","doi":"10.1007/s41779-026-01365-6","DOIUrl":"10.1007/s41779-026-01365-6","url":null,"abstract":"<div>\u0000 \u0000 <p>Porous alumina ceramics have irreplaceable application potential in the refractory and thermal insulation materials industry owing to their excellent high-temperature resistance and thermal insulation properties. However, traditional preparation methods generally suffer from limitations such as low molding accuracy and poor process controllability, failing to meet the industry’s demand for high-performance porous ceramics. As a flexible additive manufacturing technology, selective laser sintering (SLS) provides a novel pathway for the precision fabrication of porous ceramics. This study aims to efficiently prepare porous alumina ceramics via SLS. Using alumina (Al₂O₃) powder as the ceramic matrix and phenolic resin (PF) as the binder, PF-coated Al₂O₃ composite powder was prepared by the thermal coating method. Subsequently, SLS process parameters were systematically optimized via single-factor experiments combined with response surface methodology (RSM), yielding porous alumina precursors with excellent dimensional accuracy and density. Finally, the target porous ceramics were obtained by high-temperature sintering. The results show that the optimal SLS parameters are: laser power 24 W, scanning speed 1744 mm/s, scanning spacing 0.125 mm, and layer thickness 0.15 mm. Under these parameters, the precursor has a density of 1.79 g/cm<sup>3</sup>, with dimensional accuracies of 99.23%, 98.80%, and 93.17% along the X, Y, and Z directions, respectively. After sintering at 1550 °C, mercury intrusion porosimetry (MIP) characterization showed the porous alumina ceramics have a porosity of 55.7% and an average pore size of 28.85 μm. This study proposes a novel strategy for fabricating high-precision porous ceramic materials for applications in the refractory industry.</p>\u0000 </div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1937 - 1952"},"PeriodicalIF":2.6,"publicationDate":"2026-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149309916","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}
引用次数: 0
Development and characterization of low-cost bioactive endodontic cements incorporating industrial slag: a comparative study with white MTA 含工业矿渣的低成本生物活性根管胶合剂的开发和表征:与白色MTA的比较研究
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-02-26 DOI: 10.1007/s41779-026-01363-8
Evelynn Crhistyann Medeiros Duarte, Luiz Eduardo Pereira Santiago, Willame Gomes da Silva Batista, Júlio Cézar de Oliveira Freitas, Dennys Correia da Silva, Alcides de Oliveira Wanderley Neto, Fábio Roberto Dametto
{"title":"Development and characterization of low-cost bioactive endodontic cements incorporating industrial slag: a comparative study with white MTA","authors":"Evelynn Crhistyann Medeiros Duarte,&nbsp;Luiz Eduardo Pereira Santiago,&nbsp;Willame Gomes da Silva Batista,&nbsp;Júlio Cézar de Oliveira Freitas,&nbsp;Dennys Correia da Silva,&nbsp;Alcides de Oliveira Wanderley Neto,&nbsp;Fábio Roberto Dametto","doi":"10.1007/s41779-026-01363-8","DOIUrl":"10.1007/s41779-026-01363-8","url":null,"abstract":"<p>Bioactive endodontic sealers play a crucial role in restorative dentistry due to their ability to promote tissue repair and inhibit microbial proliferation. Given the high cost of commercial materials such as mineral trioxide aggregate (MTA), this study aimed to develop and characterize experimental bioactive endodontic cements composed of low-cost constituents—including fine Portland cement, ground metallurgical slag, and cellulose—while maintaining physicochemical and antimicrobial properties comparable to MTA (Angelus®). The materials were subjected to comprehensive characterization using X-ray diffraction (XRD), thermogravimetric analysis (TG/DTG), scanning electron microscopy (SEM), hydrogenionic potential (pH) analysis, inductively coupled plasma optical emission spectrometry (ICP-OES), and antimicrobial testing against Enterococcus faecalis using the agar diffusion method. Additionally, a complementary environmental assessment was performed to quantify potential CO₂ savings from clinker substitution with metallurgical slag, expressed as kg CO₂-eq per kilogram of cement. Statistical analyses were performed via ANOVA with Tukey’s post-hoc test. The experimental formulations revealed the presence of key bioactive phases, including calcium hydroxide, dicalcium and tricalcium silicates, tricalcium aluminate, and calcium carbonate. The materials exhibited a stable alkaline pH and effective antibacterial activity, confirming their biological potential. SEM imaging showed morphological differences between the experimental groups and commercial MTA, particularly regarding particle homogeneity. Nonetheless, overall physicochemical similarities were evident, especially for the slag-containing formulation (Group 2), which most closely mirrored the reference material. The environmental analysis indicated that slag incorporation led to a reduction of approximately 0.08 kg CO₂-eq per kilogram of cement (≈80 kg CO₂-eq per ton), highlighting the dual advantage of functional performance and environmental responsibility. These findings suggest the feasibility of producing alternative bioactive cements by reusing industrial by-products, offering a sustainable and economically viable option for endodontic applications without compromising clinical efficacy.</p>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1891 - 1909"},"PeriodicalIF":2.6,"publicationDate":"2026-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-026-01363-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310282","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}
引用次数: 0
Effect of different heat-treatment temperatures on the exsolution equilibrium of 85-alumina-rich spinel 热处理温度对85-富铝尖晶石析出平衡的影响
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-02-24 DOI: 10.1007/s41779-026-01368-3
Xiaogai Sun, Zhongzhuang Zhang, Kaiwei Ye, Huixia Jia, Guotian Ye, Yuandong Mu
{"title":"Effect of different heat-treatment temperatures on the exsolution equilibrium of 85-alumina-rich spinel","authors":"Xiaogai Sun,&nbsp;Zhongzhuang Zhang,&nbsp;Kaiwei Ye,&nbsp;Huixia Jia,&nbsp;Guotian Ye,&nbsp;Yuandong Mu","doi":"10.1007/s41779-026-01368-3","DOIUrl":"10.1007/s41779-026-01368-3","url":null,"abstract":"<div><p>Alumina-rich magnesia–alumina spinel (MgAl<sub>2</sub>O<sub>4</sub>) is increasingly used as a high-performance ceramic in extreme-service environments, yet the temperature dependence of its exsolution equilibrium has not been quantified; and this information is essential for optimizing in-situ toughening of refractory castables. This study systematically elucidates the isothermal exsolution kinetics and equilibrium limits of an 85-grade, alumina-rich spinel between 1100 and 1600 °C. Using a 325-mesh electrofused feedstock and dwell times ranging from 0.5 h to 7 d, we quantified phase abundances and lattice stoichiometries by Rietveld refinement of X-ray diffraction data coupled with energy-dispersive X-ray spectroscopy. Below 1300 °C the lattice remains supersaturated for up to 7 d without detectable α-Al<sub>2</sub>O<sub>3</sub> precipitation, establishing 1300 °C as the minimum kinetic threshold for measurable exsolution. The maximum extent of exsolution (lowest residual Al<sub>2</sub>O<sub>3</sub>, 78.3 wt.%) is attained at 1300 °C. Between 1400 and 1600 °C the equilibrium Al<sub>2</sub>O<sub>3</sub> content of the spinel phase is essentially constant at 80 wt.%, indicating that the extent of equilibrium exsolution becomes insensitive to temperature above 1400 °C. In contrast, the time required to reach this equilibrium state decreases with increasing temperature, from 12 h at 1300 °C to 0.5 h at 1600 °C, which is related to the acceleration of Al<sup>3+</sup> lattice diffusion.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1981 - 1993"},"PeriodicalIF":2.6,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310363","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}
引用次数: 0
Study on La2(Zr0.2Y0.2Yb0.2Nb0.2Ti0.2)2O7@YSZ core-shell structural composite oxide for thermal barrier coating 热障涂层用La2(Zr0.2Y0.2Yb0.2Nb0.2Ti0.2)2O7@YSZ核壳结构复合氧化物的研究
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-02-24 DOI: 10.1007/s41779-026-01366-5
Dongbo Zhang, Ruiqing Song, Jiangrong Yan, Xin Huang, Ning Wang
{"title":"Study on La2(Zr0.2Y0.2Yb0.2Nb0.2Ti0.2)2O7@YSZ core-shell structural composite oxide for thermal barrier coating","authors":"Dongbo Zhang,&nbsp;Ruiqing Song,&nbsp;Jiangrong Yan,&nbsp;Xin Huang,&nbsp;Ning Wang","doi":"10.1007/s41779-026-01366-5","DOIUrl":"10.1007/s41779-026-01366-5","url":null,"abstract":"<div><p>High-entropy oxides are promising thermal barrier coating (TBC) materials owing to their low thermal conductivity. However, they have poor fracture toughness. To overcome this limitation, this study designed a core–shell structural composite oxide. By combining low-toughness La<sub>2</sub>(Zr<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Nb<sub>0.2</sub>Ti<sub>0.2</sub>)<sub>2</sub>O<sub>7</sub>(L(ZYYNT)O) high-entropy oxide and high-toughness yttria-stabilized zirconia (YSZ), a new La<sub>2</sub>(Zr<sub>0.2</sub>Y<sub>0.2</sub>Yb<sub>0.2</sub>Nb<sub>0.2</sub>Ti<sub>0.2</sub>)<sub>2</sub>O<sub>7</sub>@YSZ composite was designed and chemically synthesized. Subsequently, the properties of the composite oxide were evaluated. Results show that the thermal conductivity and coefficient of thermal expansion of the L(ZYYNT)O@YSZ composite-structure ceramic are approximately 1.103 W·m<sup>− 1</sup>·K<sup>− 1</sup> at room temperature, after correcting for porosity, and approximately 9.5356 × 10<sup>− 6</sup> K<sup>− 1</sup> at 1000 °C, respectively. Moreover, its fracture toughness is approximately 3.45 MPa·m<sup>1/2</sup>, which is 43% higher than that of the L(ZYYNT)O high-entropy oxide. However, the interface formed between L(ZYYNT)O and YSZ was incoherent. The interfacial binding energy between the L(ZYYNT)O high-entropy oxide and the YSZ was determined using a Materials Studio simulation and is approximately 3.315 J/m<sup>2</sup>. Thus, the study demonstrates that the L(ZYYNT)O@YSZ composite-structure oxide exhibits potential as a TBC material.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 5","pages":"1953 - 1963"},"PeriodicalIF":2.6,"publicationDate":"2026-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149310259","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}
引用次数: 0
Impact of hemp shiv contents on hygrothermal and compressive properties of raw earth-based sustainable building materials 大麻叶含量对土质可持续建筑原料湿热压缩性能的影响
IF 2.6 4区 材料科学
Journal of the Australian Ceramic Society Pub Date : 2026-02-24 DOI: 10.1007/s41779-026-01367-4
Quoc Vuong Nguyen, Rabah Djedjig, Mourad Rahim, Anh Dung Tran-Le, DongQuy Hoang, Zhi Gao, Mai Loan Nguyen, Quoc Bao Bui, Dang Mao Nguyen
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