Xin Liu, Fan Zhang, Ji Zou, Weimin Wang, Wei Ji, Zhengyi Fu
{"title":"Biomimetic multi-layered protective materials with prestress and a periodic laminated structure","authors":"Xin Liu, Fan Zhang, Ji Zou, Weimin Wang, Wei Ji, Zhengyi Fu","doi":"10.1016/j.jmat.2025.101095","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101095","url":null,"abstract":"The nacreous layer of shells has become an excellent biomimetic template of materials due to its unique structure. Inspired by the highly complex multilayered structure of shells, biomimetic layered composite protective materials with outstanding strength, toughness, and impact resistance have been developed. As the hard phase in biomimetic pearlescent layered protective materials, ceramics suffer from inherent low toughness. Applying prestress proved to be an efficient method to enhance their toughness and impact resistance. In this study, prestressed biomimetic periodic laminated (TiB<sub>2</sub>–TiB)/Ti protective materials were fabricated with spark plasma sintering (SPS) technology under the conditions of 1450 °C and 30 MPa in an argon atmosphere. Moreover, both experimental and numerical simulation analyses were conducted to investigate their protective performance. Compared to non-prestressed protective materials, the prestressed constrained materials exhibited the significantly improved protective performance with reduced penetration depth, substantially lower residual velocity, and kinetic energy after impact. This study provided valuable insights into the structural design and performance optimization of other protective materials.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"331 1","pages":"101095"},"PeriodicalIF":9.4,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qingfeng Li, Jie Li, Ying Tang, Huaicheng Xiang, Di Zhou, Kaixin Song, Liang Fang
{"title":"Rattling effect mechanism on the temperature stability of low-sintered Ca1–x(Li1/2Eu1/2)xWO4 microwave dielectric ceramics for dielectric resonant antenna applications","authors":"Qingfeng Li, Jie Li, Ying Tang, Huaicheng Xiang, Di Zhou, Kaixin Song, Liang Fang","doi":"10.1016/j.jmat.2025.101094","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101094","url":null,"abstract":"The low dielectric constant (<em>ε</em><sub>r</sub> < 15) is the key to improving the signal transmission speed of microwave communication devices. However, the resonant frequency temperature coefficient (<em>τ</em><sub>f</sub>) of most low-<em>ε</em><sub>r</sub> microwave dielectric ceramics is usually negative. Aiming to modify the large negative <em>τ</em><sub>f</sub> of scheelite CaWO<sub>4</sub> and explore the underlying mechanism between the structure and microwave dielectric properties, a series of Ca<sub>1–<em>x</em></sub>(Li<sub>1/2</sub>Eu<sub>1/2</sub>)<sub><em>x</em></sub>WO<sub>4</sub> (<em>x</em> = 0.1−1.0) (CLEWO<sub><em>x</em></sub>) ceramics were prepared at low sintering temperatures (750−875 °C). The <em>ε</em><sub>r</sub> increased from 10.46 to 18.55, and the <em>Q</em>× <em>f</em> decreased from 39,032 GHz to 7425 GHz, mainly due to the enhanced rattling effect of Li<sup>+</sup>. The <em>τ</em><sub>f</sub> rapidly increased from negative (–19.91×10<sup>−6</sup> °C<sup>−1</sup>) to abnormally positive (+162.15×10<sup>−6</sup> °C<sup>−1</sup>), influenced by the reduced temperature coefficient of ion polarizability (<em>τ</em><sub>αm</sub>) caused by the rattling Li<sup>+</sup> cation. The CLEWO<sub>0.15</sub> sample has good comprehensive performance (<em>ε</em><sub>r</sub> = 12.28, <em>Q×f</em> = 28,027 GHz, and <em>τ</em><sub>f</sub> = –0.5×10<sup>−6</sup> °C<sup>−1</sup>) and compatibility with the Ag electrode, showing the potential of LTCC applications. Additionally, a dielectric resonator antenna based on CLEWO<sub>0.15</sub> ceramic was designed with a bandwidth of 254 MHz at 4.504−4.758 GHz and a gain of 4.87 dBi at 4.62 GHz, indicating that CLEWO<sub>0.15</sub> may be a potential candidate for dielectric resonator antennas.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"62 1","pages":"101094"},"PeriodicalIF":9.4,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of gradient pore structure, high conductivity and superhydrophilicity to ensure high performance SiC nanowire supercapacitors under 0–60 °C","authors":"Huimin Liu, Xin Zhang, Jingwen Deng, Xujiang Chao, Liyuan Han, Kezhi Li, Xuemin Yin, Hejun Li","doi":"10.1016/j.jmat.2025.101092","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101092","url":null,"abstract":"Design and optimization of electrode material structures are critical steps in the development of supercapacitors. This work presented a design strategy based on SiC nanowires (NWs) as supercapacitor electrode with gradient pore structure, superhydrophilicity, and enhanced conductivity. SiCNWs were <em>in-situ</em> fabricated on a carbon fabric substrate radially via chemical vapor deposition (CVD), constructing conical channels with gradient pore sizes that generate capillary forces and promote ion transport. An ultrathin pyrolytic carbon (PyC) shell (4.98 nm) was coated on the SiCNWs, to improve electrical conductivity without compromising pore structure or wettability. SiCNWs@PyC electrodes with a diameter of ∼0.93 μm exhibited excellent electrochemical performance from 0–60 °C. At 25 °C and a current density of 0.2 mA/cm<sup>2</sup>, the areal capacitance of SiCNWs@PyC electrode was 32.48 mF/cm<sup>2</sup>, representing 227.58% of the areal specific capacitance of pure SiCNWs. At 60 °C, the capacitance remained high at 28.09 mF/cm<sup>2</sup> under the same current density. The <em>in-situ</em> growth strategy and high mechanical stability of the material enabled the symmetric supercapacitor to maintain outstanding rate performance and cycling stability across a wide temperature range. The SiCNWs@PyC core-shell nanostructure is a promising supercapacitor electrode material, offering valuable insights for the development of next-generation energy storage devices.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"3 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huan Liu, Yingxin Yang, Atsha Ambar, Dongdong Liang, Jie Ren, Zhiqiang Fan, Man Nie, Ying Sun, Cong Wang
{"title":"Broadening of infrared radiation band based on inorganic metamaterials for radiative cooling","authors":"Huan Liu, Yingxin Yang, Atsha Ambar, Dongdong Liang, Jie Ren, Zhiqiang Fan, Man Nie, Ying Sun, Cong Wang","doi":"10.1016/j.jmat.2025.101093","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101093","url":null,"abstract":"Radiative cooling (RC) represents a crucial heat dissipation method for spacecraft and electronic devices. In these applications, broader infrared radiation contributes to more efficient cooling. Inorganic materials are extensively employed due to their exceptional resistance to photothermal degradation. However, the narrow infrared intrinsic absorption peaks of these materials present a significant challenge in broadening their radiation bands. This study introduces an innovative square-column metamaterial (SCMM) developed through the integration of a metasurface with an inorganic multilayer film, specifically Si<sub>3</sub>N<sub>4</sub>/Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub>/Si<sub>3</sub>N<sub>4</sub>/Ag/(etched Si substrate), using optical etching technology. The incorporation of the metasurface structure extends and regulates the radiation band of the inorganic multilayer film from 8–13 μm to 8–20 μm. Through size adjustment of the square column, the emissivity in the 8–20 μm wavelength range increases from 80.3% to 92.1%. The achievement of broad and high infrared radiation is attributed to localized surface plasmon resonance and metal–insulator–metal cavities in the micrometer array. Moreover, the SCMM demonstrates excellent cooling characteristics in actual temperature measurements. This research offers an innovative approach for RC materials to address spectral requirements in specific applications.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"9 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sitong Luo , Yujin Wang , Jingxuan Liang , Yuntian Jiang , Zhibo Wei , Yifan Du , Liang Lv , Shuqi Zheng , Weiyu Song
{"title":"Realizing high thermoelectric performance of CuGaTe2 via CdTe-doping-driven band engineering and chemical bond modulation","authors":"Sitong Luo , Yujin Wang , Jingxuan Liang , Yuntian Jiang , Zhibo Wei , Yifan Du , Liang Lv , Shuqi Zheng , Weiyu Song","doi":"10.1016/j.jmat.2025.101089","DOIUrl":"10.1016/j.jmat.2025.101089","url":null,"abstract":"<div><div>CuGaTe<sub>2</sub> is p-type thermoelectric material with high thermoelectric potential. However, its performance is hindered by its intrinsic high resistivity and thermal conductivity. In this study, a synergistic strategy combining band engineering and chemical bonding modulation is employed to simultaneously optimize the electrical and thermal transport properties of CuGaTe<sub>2</sub>. First-principles calculations reveal that Cd preferentially occupy Ga sites, leading to bandgap narrowing and increasing density of states near Fermi level. Consequently, both carrier concentration and density-of-states effective mass are simultaneously optimized, ultimately power factor reaches 1359 μW·m<sup>−1</sup>·K<sup>−2</sup>. Phonon dispersion analysis reveals that Cd doping induces acoustic-optical phonon avoided crossing behavior, decelerating phonon velocity. Combined with the increase of Grüneisen parameter and weakened chemical bonding, which significantly enhances lattice anharmonicity, leading to effectively reduce in lattice thermal conductivity. Microstructural characterization further reveals that CdTe doping leads to the formation of three-dimensional defect network consisting of point defects, dislocations, and stacking faults enhances phonon scattering. Ultimately, lattice thermal conductivity of doped sample is reduced to 0.81 W·m<sup>−1</sup>·K<sup>−1</sup>. Consequently, (CuGaTe<sub>2</sub>)<sub>0.9975</sub>(2CdTe)<sub>0.0025</sub> sample achieves enhanced <em>zT</em> of 1.05 at 823 K. This work provides insights into the synergistic effects of band engineering and chemical bonding modulation, offering pathway for the design of thermoelectric materials.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 6","pages":"Article 101089"},"PeriodicalIF":8.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qi Zhao , Zhen Fan , Yi Wang , Qiulin Liu , Xuejuan Dong , Xiaowei Wu , Zhicheng Shan , Hangtian Zhu , Zhiliang Li , Shufang Wang , Huaizhou Zhao
{"title":"Atomic-defect-suppressed pristine p-type Bi0.3Sb1.7Te3 as robust high-performance thermoelectrics for power generation and cooling","authors":"Qi Zhao , Zhen Fan , Yi Wang , Qiulin Liu , Xuejuan Dong , Xiaowei Wu , Zhicheng Shan , Hangtian Zhu , Zhiliang Li , Shufang Wang , Huaizhou Zhao","doi":"10.1016/j.jmat.2025.101090","DOIUrl":"10.1016/j.jmat.2025.101090","url":null,"abstract":"<div><div>High-strength high-performance p-type (Bi,Sb)<sub>2</sub>Te<sub>3</sub> are of pivotal importance for near-room-temperature thermoelectric conversions, the reliable synthesis and fabrication has been viewed of imperative priority. It is known that the energy-favorable formation of anti-site Sb<sub>Te</sub><sup>’</sup> and vacancy v<sub>Sb</sub><sup>'''</sup> acceptor defects from high-temperature syntheses results in additional charge carriers and scattering centers for electrical and phonon transport. However, how p-type (Bi,Sb)<sub>2</sub>Te<sub>3</sub> with minimal lattice defects function remains to be scrutinized. Herein, we present the synergistic enhancements of mechanical robustness and thermoelectric property in crystallographic-defect-suppressed pristine (Bi,Sb)<sub>2</sub>Te<sub>3</sub> through a simple mechanical alloying combined with spark-plasma-sintering (SPS) process. The Sb<sub>Te</sub><sup>’</sup> and v<sub>Sb</sub><sup>'''</sup> acceptor defects were efficiently restrained, contributing to markedly increased charge carrier mobilities. A slightly enlarged band gap of 0.24 eV underpinned enhanced thermoelectric performance for pristine Bi<sub>0.3</sub>Sb<sub>1.7</sub>Te<sub>3</sub> over a wide temperature range, delivering high <em>zT</em><sub>300 K</sub> of 1.16 and <em>zT</em><sub>ave</sub> of 1.21 over 300–473 K. Interestingly, the confined <em>in-situ</em> grain coarsening during SPS with uniform dispersive nanopores readily endowed an ultra-high compressive strength of 206 MPa, surpassing that of reported (Bi,Sb)<sub>2</sub>Te<sub>3</sub> so far. A 7-pair module (coupled with n-Bi<sub>2</sub>Te<sub>3</sub>) was fabricated, demonstrating a competitive Δ<em>T</em> over 70 K at <em>T</em><sub>hot</sub> = 300 K. Furthermore, a power-generation module coupled with n-Mg<sub>3</sub>SbBi registered a cutting-edge thermoelectric conversion efficiency of 9.5% at a temperature gradient of 250 K. The strategy eliminates the need of complex processing nor extrinsic doping for pristine (Bi,Sb)<sub>2</sub>Te<sub>3</sub>, demonstrating great potentials in thermoelectric power generation and cooling applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 6","pages":"Article 101090"},"PeriodicalIF":8.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144183760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhixing Wan, Shuo Wang, Yahao Mu, Ruihua Zhou, Hang Liu, Tingwu Jin, Di Wu, Jianlong Xia, Ce-Wen Nan
{"title":"PTCDA/CuS cathode enabling stable sulfide-based all-solid-state batteries","authors":"Zhixing Wan, Shuo Wang, Yahao Mu, Ruihua Zhou, Hang Liu, Tingwu Jin, Di Wu, Jianlong Xia, Ce-Wen Nan","doi":"10.1016/j.jmat.2025.101091","DOIUrl":"https://doi.org/10.1016/j.jmat.2025.101091","url":null,"abstract":"Organic cathode materials have garnered significant attention for their potential application in lithium-ion batteries due to their lightweight nature, tunable structures, high energy density, and environmental friendliness. However, the dissolution of organic cathodes in liquid electrolytes often leads to poor cycling stability, which limits their practical application. In this study, a composite cathode was prepared by ball milling the PTCDA/CuS (perylene-3,4,9,10-tetracarboxylic dianhydride, PTCDA) with a sulfide-based electrolyte and carbon nanotubes. By optimizing the component ratios, the assembled all-solid-state batteries (ASSBs) show a high discharge capacity of 210 mA⸱h/g after 200 cycles without any capacity degradation at a current density of 33.0 mA/g. Through comprehensive characterization techniques including X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), the coordination of Cu<sup>2+</sup> and the formation of sulfur-linked polymers during the charge-discharge processes are elucidated, and the reversibility of the electrochemical reactions has been confirmed. This work highlights the excellent compatibility between organic cathodes and sulfide-based electrolytes, providing a new way for the development of high-performance ASSBs with high energy density and extended lifespan.","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"14 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A hybrid processing technology for fabricating lead zirconate-based ceramics with high energy storage density, high efficiency, and low sintering temperature","authors":"Cangjin Li, Manwen Yao, Xi Yao, Chunyu Li","doi":"10.1016/j.jmat.2025.101077","DOIUrl":"10.1016/j.jmat.2025.101077","url":null,"abstract":"<div><div>For multilayer ceramic capacitors, co-sintering of ceramics with inner electrodes is a crucial issue. This requires ceramic materials to have a low sintering temperature. In response to this criterion, a hybrid processing technology is proposed in this study. This technology involves mixing of calcined ceramic powders with sol solutions to obtain composite powders. Eventually, sintering temperature of the obtained composite material is reduced from 1300 °C to 1120 °C. This is originated from the introduction of more specific surface areas and more oxygen vacancies by sol solutions, leading to an enhancement of chemical reaction activity. The ceramic powders and the sol solutions used in this work are (Pb<sub>0.94</sub>La<sub>0.04</sub>)(Zr<sub>0.51</sub>Sn<sub>0.47</sub>Hf<sub>0.01</sub>Ti<sub>0.01</sub>)O<sub>3</sub> and (Pb<sub>0.97</sub>La<sub>0.02</sub>)(Zr<sub>0.6</sub>Sn<sub>0.4</sub>)O<sub>3</sub>, respectively. Such composition design helps improve the dielectric constant and polarization intensity. While in the meantime, because of the strong interfacial resistance caused by sol solutions, interfacial insulation as well as electrical breakdown strength can be significantly improved. Consequently, a high energy storage density up to 12.4 J/cm<sup>3</sup> and an efficiency of 92.4% is obtained in this work. Overall, this technology is applicable to a wide range of ceramic material systems, and provides an innovative design and manufacture of ceramics.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 6","pages":"Article 101077"},"PeriodicalIF":8.4,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modulation in sintering characteristics and microwave dielectric properties of Ca3Co2SiV2O12 via Li+ inequivalent substitution","authors":"Zhenli Tao, Jiamao Li, Junxian Wang, Yuxuan Ren, Yunfeng Guo, Qinghe Yang, Zhihao Yuan, Rui Tian, Wenbo Wang","doi":"10.1016/j.jmat.2025.101074","DOIUrl":"10.1016/j.jmat.2025.101074","url":null,"abstract":"<div><div>In this study, the inequivalent substitution of Ca<sup>2+</sup> by Li<sup>+</sup> in the Ca<sub>3</sub>Co<sub>2</sub>SiV<sub>2</sub>O<sub>12</sub> compound was designed to modulate its sintering characteristics and microwave dielectric properties. The corresponding Ca<sub>3–<em>x</em></sub>Li<sub>2<em>x</em></sub>Co<sub>2</sub>SiV<sub>2</sub>O<sub>12</sub> (CCSV-<em>x</em>Li, 0.01≤ <em>x</em> ≤ 0.07) ceramics were prepared <em>via</em> the conventional solid-state phase method, which could be densely sintered at a temperature below 1140 °C. Rietveld refinement results suggested that all the doped Li occupied the Ca-site as <em>x</em> ≤ 0.05 while superfluous Li positioned at the Co-site of CCSV when <em>x</em> = 0.07. This atomic occupancy had a remarkable effect on the degree of “rattling effect” and thus modulated the relative permittivity of ceramics, constantly increasing at <em>x</em> = 0.01–0.05 and slightly decreasing at <em>x</em> = 0.07. Raman spectra revealed that <em>Q</em>×<em>f</em> value was closely related to Raman shift and FWHM. Also, the <em>Q</em>×<em>f</em> value was partly influenced by oxygen vacancy concentration. The <em>τ</em><sub>f</sub> demonstrated an opposite tendency to the bond valence of the A-site and was affected by the “rattling effect”. The CCSV-0.05Li ceramic sintered at 1120 °C possessed excellent microwave dielectric properties: <em>ε</em><sub>r</sub> = 12.17, <em>Q</em>×<em>f</em> = 56,220 GHz, and <em>τ</em><sub>f</sub> = −8.5 × 10<sup>−6</sup> °C<sup>−1</sup>.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 6","pages":"Article 101074"},"PeriodicalIF":8.4,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143933325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Peng Yan , Mingming Si , Yongping Liu, Yu Ren, Jie Min, Xu Wang, Qi Ding, Weizhong Jiang, Yuchi Fan, Wan Jiang
{"title":"Hard, strong, and tough cold-sintered α-quartz composites as high-performance structural ceramics","authors":"Peng Yan , Mingming Si , Yongping Liu, Yu Ren, Jie Min, Xu Wang, Qi Ding, Weizhong Jiang, Yuchi Fan, Wan Jiang","doi":"10.1016/j.jmat.2025.101076","DOIUrl":"10.1016/j.jmat.2025.101076","url":null,"abstract":"<div><div>Cold-sintered ceramics typically exhibit inferior mechanical properties compared to high-temperature sintered counterparts. We demonstrate that introducing large internal stress through highly concentrated nanodiamonds (NDs) significantly enhances cold-sintered α-quartz composites to structural ceramic levels. At 500 MPa cold-sintering pressure, uniformly dispersed NDs generate 1.2 GPa local prestress <em>via</em> Young's modulus difference, while pressure-modulated internal stress is evidenced by dielectric property changes. The optimized composite achieves fracture toughness of (3.65 ± 0.21) MPa·m<sup>1</sup>/<sup>2</sup> (180% increase) and Vickers hardness of 10.6 GPa (80% increase), matching some high-temperature-sintered ceramics. Toughening arises from prestress-driven crack deflection and crack tip bridging, while hardness enhancement stems from NDs' rigid constraint and high-pressure-induced dislocations in silica matrix. Compressive strength increases by 90% and fatigue life exceeds 1000 cycles, attributed to internal stress-strengthened grain boundaries and improved toughness. This work presents a transformative strategy for developing damage-resistant ceramics, meriting further exploration of scalability and engineering applications.</div></div>","PeriodicalId":16173,"journal":{"name":"Journal of Materiomics","volume":"11 6","pages":"Article 101076"},"PeriodicalIF":8.4,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}