Journal of Advanced Ceramics最新文献

{"title":"Additive manufacturing of graphene oxide-doped SiOC/Si ₃N ₄ photothermal functional bioceramic scaffolds through stereolithography technology","authors":"Yange Li, Hongyu Xing, Lei Lai, Hui Li, Hongyu Zhao, Qingguo Lai, Bin Zou","doi":"10.26599/jac.2025.9221098","DOIUrl":"https://doi.org/10.26599/jac.2025.9221098","url":null,"abstract":"Clinical photothermal therapy for preventing bone tumor recurrence faces dual challenges: systemic toxicity risks from intravenous photosensitizer delivery and insufficient control of photothermal specificity. To address these limitations, we developed a stereolithography (SLA)-based additive manufacturing system for fabricating graphene oxide (GO)-reinforced SiOC/Si₃N₄ bioceramic scaffolds that integrate three functional components: a mechanically robust Si₃N₄ matrix, photothermally active SiOC, and osteoinductive GO. Initially, the polysiloxane KH570-H was synthesized, functioning as both a SiOC precursor and a photosensitive polymer, and subsequently formulated with 0-0.8 wt% GO/Si₃N₄ to develop SLA-compatible ceramic slurries. To address GO-induced light scattering defects, a GO content-photosensitive parameters predictive model was established, improving the dimensional accuracy of printed green bodies by 12.5% compared to non-optimized counterparts. Following sintering post-treatment, 0-0.8 wt% GO/SiOC/Si₃N₄ composite ceramics were fabricated, with the 0.2 wt% GO variant sintered at 1,300^oC demonstrating optimal multifunctional performance. The compressive strength of the Gyroid unit TPMS scaffold with a porosity of 60% reached 41.88 MPa. Notably, the 0.2 wt% GO formulation showed superior cell proliferative capacity, as evidenced by fluorescence microscopy observations of confluent cell monolayers with extensive pseudopodial extensions, indicative of active osteogenic interactions. Under 808 nm near-infrared irradiation (1 W/cm²), the scaffold achieved rapid photothermal activation, reaching the therapeutic threshold of 47.8°C within 10 minutes in a physiomimetic microenvironment. This photothermally functional GO/SiOC/Si₃N₄ scaffold offers a promising dual-functional solution for post-tumor bone regeneration, combining structural adaptability with spatiotemporally controlled therapeutic precision.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"14 7","pages":"9221098-9221098"},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sciopen.com/article_pdf/1924385661483847682.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147878094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superior thermal and oxygen barrier properties of high-entropy ferroelastic rare earth tantalate (8RE _1/8)TaO ₄","authors":"Jun Wang, Yongpan Zeng, Xiaoyu Chong, Manyu Zhang, Qianqian Jin, Y. Sun, Xiangwei Tang, Peng Wu, Jing Feng","doi":"10.26599/jac.2024.9221000","DOIUrl":"https://doi.org/10.26599/jac.2024.9221000","url":null,"abstract":"Thermal/environmental barrier coatings (T/EBCs) are used to protect hot-section superalloys and/or ceramic matrix composite components from hot corrosion and oxidation; however, the majority of T/EBCs exhibit extremely high thermal and ionic conductivities. Here, we obtain a novel rare-earth tantalate with excellent oxygen and thermal insulation via a high-entropy strategy. The high-entropy component (8RE_1/8)TaO₄ (RE = rare earth), which is designed by large size disorder and mass disorder, has been reassembled into a stabilized monoclinic structure. (8RE_1/8)TaO₄ had 30.0%–31.1% and 59.2%–67.5% lower intrinsic thermal conductivity than single-RE RETaO₄ and 8(Y₂O₃–ZrO₂) 8YSZ at 1200 °C, respectively, and exhibited lower intrinsic thermal conductivity across the entire temperature range of 100–1200 °C. This is the result of strong scattering by the phonon–phonon, grain boundary, domain boundary, dislocation, and vacancy defects. The ionic conductivity of (8RE_1/8)TaO₄ is 3712–29,667 times lower than that of 8YSZ at 900 °C, benefiting from the strong Ta–O bonding strength, low concentration of mobile oxygen vacancies and severe lattice distortions that impede carrier transport. Moreover, (8RE_1/8)TaO₄ had superior high-temperature stability and excellent mechanical properties. Analysis of above results demonstrates that (8RE_1/8)TaO₄ is a promising candidate for T/EBCs.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 12","pages":"2051-2067"},"PeriodicalIF":0.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9221000.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147916415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Brilliant cryogenic magnetic refrigerant with excellent magnetocaloric effect and refrigeration performances","authors":"Zhaojun Mo, Hui-Cai Xie, Yan Li, Jiaxin Jiang, Zhenxing Li, Xinqiang Gao, Fengxia Hu, Jun Shen, Baogen Shen","doi":"10.26599/jac.2024.9220992","DOIUrl":"https://doi.org/10.26599/jac.2024.9220992","url":null,"abstract":"There is an urgent demand for the development of new resource-saving and high-efficiency cryogenic refrigeration technologies against the historical backdrop of increasing scarcity of resources and energy. Magnetic refrigeration technology based on the magnetocaloric effect (MCE) of magnetic materials is a promising approach to address helium resource constraints and improve energy efficiency. Here, a brilliant cryogenic magnetic refrigerant with a large low-field MCE and excellent refrigeration performance is presented. Benefiting from the enhanced ferromagnetism and low saturation magnetic field, the peaks of magnetic entropy change, refrigeration capacity, and adiabatic temperature change of Eu(Ti,Nb,Zr)O₃ compounds reach 19.6 J·kg⁻¹·K⁻¹, 87.6 J·kg⁻¹, and 5.5 K, respectively, for a field change of 0−1 T. Magnetic refrigeration experiments on a Gifford‒McMahon (GM)/magnetic hybrid refrigerator further demonstrated that EuTi_0.8375Nb_0.0625Zr_0.1O₃ is an excellent magnetic refrigerant operating near the liquid helium temperature. An appropriate amount of this magnetic refrigerant can significantly improve the refrigeration performance of the hybrid refrigerator. The cooling power in hybrid refrigeration mode is improved by a maximum of 52% over that in pure GM/HoCu₂ mode at 4.2 K and 0.5 Hz. In addition, the cooling efficiency at 4.2 K is more than 40% greater than that of the pure GM/HoCu₂ refrigerator.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 12","pages":"1996-2003"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220992.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147904049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase engineering on high-entropy transition metal dichalcogenides and the entropy-enhanced thermoelectric performance","authors":"Hongxiang Chen, Enhui Zhao, Xiaochun Wen, Sheng Liu, Shiyu Li, Jiantao Fu, Hengzhong Fan, Bing Xiao, Yongsheng Zhang","doi":"10.26599/jac.2024.9220991","DOIUrl":"https://doi.org/10.26599/jac.2024.9220991","url":null,"abstract":"High-entropy structures in layered compounds, especially transitional metal dichalcogenides (TMDCs), have powered the field with disordered and versatile chemical compositions, showing great potential in various functional applications, including energy storage and catalysis. However, the reported high-entropy phases are mainly 1T phases, 2H phases are rare, and approximately 3R phases are still lacking. Here, phase engineering of high-entropy TMDCs is achieved by tuning the chemical composition of (Mo_0.5W_0.5)_1−<i>x</i>(Nb_0.5Ta_0.5)_<i>x</i>Se_2+<i>δ</i>, 0 ≤ <i>x</i> &lt; 1, and −0.1 ≤ <i>δ</i> ≤ 0.3. A phase diagram is constructed to guide the synthesis of pure 2H/3R phases over a wide composition/entropy range. The increase in VB-group element content and Se overdose facilitated the formation of 3R phases, whereas the opposite occurred for 2H phases. Thermodynamic first-principles calculations evaluate the stability of phases in different polytypes and compositions, matching well with the composition-dependent crystalline habits. Moreover, the optimized thermoelectric performance, with a figure of merit (<i>zT</i> = 0.36@723 K) in 2H phase of <i>x</i> = 0.2, is attributed to the low thermal conductivity (<i>κ</i>) caused by the high-entropy effect, which is one of the highest among (Mo/W)Se₂-based materials. Our work enriches high-entropy TMDCs with versatile polytypes, expanding their potential uses for various fields.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 12","pages":"1985-1995"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220991.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147895497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dielectric–magnetic manipulation of reduced graphene oxide permittivity for enhanced electromagnetic wave absorption","authors":"Kaili Zhang, Zhen Wang, Yuefeng Yan, Guansheng Ma, Renchao Che, Dechang Jia, Xiaoxiao Huang, Yu Zhou","doi":"10.26599/jac.2024.9220990","DOIUrl":"https://doi.org/10.26599/jac.2024.9220990","url":null,"abstract":"Graphene is a promising electromagnetic wave absorption (EMWA) material because of its structural designability, controllable electromagnetic properties, and excellent stability. However, the impedance mismatch caused by high conductivity and dielectric properties has seriously hindered the application of graphene in the EMWA field. In this work, based on the dielectric dispersion behavior of ideal broadband absorption as a guide, a Fe microsheet/reduced graphene oxide (Fe/RGO) composite was prepared by simple hydrothermal and thermal reduction methods. The permittivity of RGO is optimized by adjusting the content of anisotropic Fe microsheets, and a balance between attenuation ability and impedance matching is achieved. Theoretical calculations and off-axis electron holography results reveal that the abundant polar sites and heterogeneous interfaces of Fe and RGO enhance the dipole and interface polarizations. The three-dimensional (3D) conductive network structure contributes to multiple reflections of incident electromagnetic waves and conduction loss. The natural and exchange resonances and eddy current loss caused by anisotropic Fe microsheets further increase magnetic loss. Based on the dielectric-magnetic loss mechanism and good impedance matching, Fe/RGO achieves a minimum reflection loss (RL_min) of −67.95 dB at 8.48 GHz and a maximum effective absorption bandwidth (EAB_max) of 6.91 GHz (11.09–18 GHz) with a low filling content of 10 wt%. In addition, Fe/RGO has excellent radar stealth performance, with a radar cross section (RCS) of −31.21 dBm² at 0°. Therefore, the proposed strategy and theoretical analysis provide a reference for the microstructure design, composition, and mechanism analysis of EMWA materials.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 12","pages":"1974-1984"},"PeriodicalIF":0.0,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220990.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147917230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of grain size on mechanical properties and tribological behavior of size-tunable high entropy diboride ceramics obtained by two-step SPS sintering","authors":"Yao Yang, Jianqiang Bi, Linjing Qiao, Guandong Liang, Shuyong Liang, Shushuai Liu, Shaoyin Wang, Hongyu Gong, Zhao Qian, Jinwang Shi, Weiqiang Li","doi":"10.26599/jac.2024.9220980","DOIUrl":"https://doi.org/10.26599/jac.2024.9220980","url":null,"abstract":"High-entropy diboride (HEB) ceramics constitute a novel class of ultrahigh-temperature ceramics that are appealing for applications in extreme environments. The relative density and grain size play important roles in tailoring the mechanical properties and wear resistance of HEBs, affecting their applications, such as high-temperature structural parts and thermal protection systems. In this study, highly dense (HfZrTaVNb)B₂ ceramics with size-tunable microstructures were successfully synthesized by spark plasma sintering combined with an ingenious two-step strategy. The effects of grain size on the mechanical properties and wear resistance of (HfZrTaVNb)B₂ ceramics were comprehensively investigated. The results indicated that the smaller grain size led to higher hardness and fracture toughness, and the relationship between hardness and grain size fitted the Hall–Petch equation well. In particular, the sample featuring a grain size of 1.64 µm and 97.6% density had the highest hardness and fracture toughness, 26.7 GPa and 4.6 MPa·m^1/2, respectively. Notably, it also demonstrated optimal wear resistance, displaying a minimal wear rate of only 2.53×10⁻⁶ mm³/(N·m) under a 20 N load. Microstructure analysis revealed that the primary wear mechanism observed in (HfZrTaVNb)B₂ was oxidative wear under a 5 N load. Under a 10 N load, the wear mechanism comprised both oxidative and fracture wear. The wear mechanism became more complex and involved oxidation wear, fracture wear, abrasive wear, and fatigue wear at a 20 N load.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 11","pages":"1835-1843"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147884394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Etching-time-regulated strategy toward delaminated Mo ₂CT _<i>x</i> MXene for tailoring electromagnetic wave absorption","authors":"Yukai Chang, Huilan Zhao, Xin Liu, Yingjie Huo, Binbin Dong, Libo Wang, Hari Bala, Qianku Hu, Aiguo Zhou","doi":"10.26599/jac.2024.9220977","DOIUrl":"https://doi.org/10.26599/jac.2024.9220977","url":null,"abstract":"MXene-based absorbers have shown promising application prospects because of their sophisticated structural design and clever material composites. However, the intrinsic MXene materials themselves have not achieved significant breakthroughs in microwave absorption (MA) performance. Therefore, the development of novel and efficient pure MXene absorbing materials is imperative to address inherent mismatches in electromagnetic parameters, highlighting the urgent need in this area. Here, a straightforward strategy involving etching time modulation is proposed to customize the electromagnetic wave (EMW) absorption properties of delaminated Mo₂CT_<i>x</i> MXene. The impact of varying etching degrees on the EMW absorption capabilities of Mo₂CT_<i>x</i> MXenes was systematically investigated through controlled etching durations of Mo₂Ga₂C MAX phase. Among them, the sample etched for 12 h achieved an effective absorption bandwidth (EAB) of 4.4 GHz at an ultrathin thickness of 1.3 mm, and the strongest reflection loss (RL) value was as high as −60.7 dB when the sample etching time was increased to 24 h. The improvement in absorbing performance was attributed to the dielectric loss and polarization process induced by terminal functional groups and surface-rich defects, which optimized impedance matching. This work establishes that intrinsic Mo₂CT_<i>x</i> MXene materials with superior absorbing properties outperform traditional pure MXenes, providing a strong basis for advancing Mo-based MXene absorptive materials.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 11","pages":"1795-1806"},"PeriodicalIF":0.0,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220977.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147889405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Balancing the piezoelectric coefficient and carrier concentration of Bi ₂WO _{6− <i>x</i>} for ultrahigh piezocatalysis","authors":"Ying Wang, Xiaoli Xu, Lingbo Xiao, L Li, Qiuhua Xu, Zhenhai Wen, Laishun Qin, Yanmin Jia, Dong‐Liang Peng, Wanping Chen, Da Chen","doi":"10.26599/jac.2024.9220970","DOIUrl":"https://doi.org/10.26599/jac.2024.9220970","url":null,"abstract":"Balancing the piezoelectric coefficient and carrier concentration of materials is key in the field of piezocatalysis. In this work, Bi₂WO₆ material with both piezoelectric and semiconductor properties was chosen as a model material. A one-step ethylene glycol (EG)-assisted solvothermal method was used to synthesize Bi₂WO₆ with oxygen vacancies. By controlling the solvothermal time and temperature, the oxygen vacancy concentration (<i>C</i>_OV) was regulated. As <i>C</i>_OV increases, the piezoelectric coefficient decreases, the carrier concentration increases, and the hydrogen production rate first increases but then decreases. When <i>C</i>_OV reaches 1.45×10¹² spins·mg⁻¹, the corresponding piezoelectric coefficient and carrier concentration are 13.9 pm·V⁻¹ and 2.90×10²⁰ cm⁻³, respectively. The optimal hydrogen production rate per power of 2.21 μmol·g⁻¹·h⁻¹·W⁻¹ is equivalent to or even better than that of most reported piezocatalysts. The piezoelectric coefficient and carrier concentration, as two factors, jointly determine the piezocatalytic performance. The findings of this research can provide important and deep-seated insights for better piezocatalysts in the future.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 11","pages":"1737-1747"},"PeriodicalIF":0.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220970.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147913222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexible and resilient Co/TiO ₂/SiOC nanofibers via electrospinning: Towards thermal and electromagnetic wave protection","authors":"Linghao Pan, Rui Liu, Fanqi Meng, Zhonglin Li, Yi Hou, Lixi Wang","doi":"10.26599/jac.2024.9220968","DOIUrl":"https://doi.org/10.26599/jac.2024.9220968","url":null,"abstract":"Polymer-derived ceramic (PDC)-SiOC is a highly promising microwave-absorbing material characterized by high temperature resistance, lightweight, high strength, and extremely low cost. The weak electromagnetic wave (EMW) attenuation capacity and poor flexibility of single precursor-derived SiOC ceramics significantly limit their further application. This study employs a simple electrospinning technique to uniformly distribute Co and TiO₂ within amorphous SiOC nanofibers. The three-dimensional porous structure formed by continuous nanofibers endows Co/TiO₂/SiOCs with high porosity, significantly reducing the thermal conductivity and enhancing the conductive loss of electromagnetic waves within the nanofiber mats. Additionally, the introduction of Co and Ti promotes nanostructuring of the fibers and introduces polarization interfaces and defects, thereby enhancing the polarization loss of the samples. With a filler content of only 5 wt%, the Co/TiO₂/SiOC sample heat-treated at 800 °C (in silicone resin) exhibits an effective absorption bandwidth (EAB) of up to 8.64 GHz (9.36–18.00 GHz) at a thickness of 3.25 mm, achieving a minimum reflection loss (RL_min) value of −66.00 dB at 17.11 GHz with a matching thickness of 2.50 mm. Moreover, the nanofiber mats also demonstrate excellent thermal insulation performance (thermal conductivity ranging &lt; 0.041 W·m⁻¹·k⁻¹), remarkable flexibility (the resistance change rate after 1500 cycles of 180° bending test is less than 4%), and impressive resilience performance (residual strain &lt; 12% after 500 cycles under 60% strain conditions). The successful preparation of such multi-functional nanofiber mats is promising for the application of thermal and microwave protection.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 10","pages":"1666-1676"},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220968.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147910126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-feedback healing mechanism redefining anti-oxidation coatings in fiber-reinforced composites","authors":"Yuanshuai Wang, Xinyu Wang, Pianpian Zhang, Anqi Lun, Yuewei Li, Yi Wang, Lizhe Xing, Zhengyang Fu, Ya’nan Yang, Long Xia","doi":"10.26599/jac.2024.9220966","DOIUrl":"https://doi.org/10.26599/jac.2024.9220966","url":null,"abstract":"This study introduces a pioneering design concept termed the “dual-feedback healing mechanism”, which investigates the relationship between oxidation products and protective coatings. Specifically, it focuses on channeling oxidation products generated at exposed cracks in the substrate to interact with the antioxidant coatings, enabling a self-repair mechanism for cracks. BN_f/SiBN was chosen as the ceramic matrix, while the Si‒O‒Al system served as the antioxidant coating. The dynamic process of obtaining Si–O–Al (SOAC) coating involving the pyrolysis of organic precursors and the dual-feedback healing mechanism were systematically investigated. These findings indicate that when the temperature surpasses 1150 °C, the exposed BN fibers at the cracks are oxidized, transforming into B₂O₃(g). Subsequently, B₂O₃(g) reacts with SiO₂, forming a SiBO mixture. The mixture effectively diminishes the viscosity of the coating, enabling it to flow and form a fresh protective layer that effectively blocks O₂ infiltration. Consequently, after oxidation at 1500 °C, the coated samples experience a mere 3% weight loss. This technology emphasizes the interconnectivity during material transformation, utilizing matrix oxidation products as a driving force for self-healing of the coating. This approach achieves intelligent-like, targeted closure of oxygen pathways, thereby pioneering a novel concept and direction for the advancement of antioxidant coatings. Consequently, this approach not only enhances our understanding of the fundamental nature of “self-healing” but also holds significant potential in the development of reparable antioxidant coatings.","PeriodicalId":502524,"journal":{"name":"Journal of Advanced Ceramics","volume":"13 10","pages":"1643-1654"},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciopen.com/local/article_pdf/10.26599/JAC.2024.9220966.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147898614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}