JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Qingyi Kong,Sijia Huo,Lei Chen,Yujin Wang,Jiahu Ouyang,Yu Zhou
Fully dense (Zr, Ti)B 2 -(Zr, Ti)C-SiC ceramics were prepared by reactive hot-pressing using ZrB 2 , TiC, and SiC as the initial materials for the first time. Effects of SiC addition on the microstructure evolution and mechanical properties were reported. The in-situ reaction between ZrB 2 and TiC as well as the SiC addition leads to the grain refinement. Besides, elongated (Zr, Ti)B 2 plate-like grains are obtained due to the occurrence of a transient liquid phase, which leads to the crack deflection in the matrix effectively. Mechanical properties are improved significantly due to grain-refinement and solid solution strengthening, and plate-like grains toughening effects. The ZrB 2 -10 mol%TiC composite with 10 mol% SiC additional exhibits good comprehensive mechanical properties of the hardness of 20.2 GPa, the flexural strength of 803 MPa, and the fracture toughness of 5.7 MPa m 1/2 .
研究领域:
材料科学
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陶瓷工程
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 10
·118294
·
IF 6.3
Chengwan Yang,Mengen Hu,Xian Dang,Yuebin Li,Xinyang Li,Dilong Liu,Xiaoye Hu,Yue Li,Abdumutolib Atakhanov,Jian Zhang,Zhulin Huang
Ceramic aerogels, recognized as lightweight, low thermal conductivity, and chemically stable thermal insulation materials. However, their inherent brittleness leads to low mechanical strength and poor compressive performance, and there is still the problem of relatively high thermal conductivity at high temperatures. Herein, we developed a lamellar zirconium boride-silicon carbide (ZrB 2 -SiC) ceramic nanofiber aerogel via electrospinning, achieving an ultralow density (53 mg·cm −3 ), high elasticity (40% recoverable strain), and ultralow thermal conductivity (0.038 W·m −1 ·K −1 at room temperature). The excellent elasticity originates from the interaction between hard nanoparticles (ZrB 2 , SiC) and soft amorphous phases (SiO x C y , carbon) within the fibers, synergistically reinforced by the lamellar structure. Meanwhile, the extremely low thermal conductivity is attributed to the multiscale porous network, the abundant heterogeneous interfaces, and the enhanced radiation heat dissipation. These mechanisms, supported by both experimental characterization and theoretical simulations, provide new insights for lightweight structures with intrinsic elasticity and high-efficiency thermal insulation capabilities.
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高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2026
·
IF 2.6
Wan Shuchang,Shao Rongdan,Liu Hao,Wang Zhoufu,Liu Wenyuan,Liu Xuhao,Ma Yan,Zhou Qian,Wang Xitang
In this study, ZrB 2 -SiC-based ceramic composites were fabricated via hot pressing by incorporating Y 2 O 3 and YF 3 additives, respectively, to optimize their microstructure and comprehensive performances. The results indicate that both additives promoted sintering densification and mechanical reinforcement through the in situ formation of YBO 3 phases at the grain boundaries. Notably, the addition of YF 3 yielded superior overall performance compared to Y 2 O 3 . The composites with added YF 3 achieved relative density of 99.82%, with hardness of 14.55 GPa, flexural strength of 366.3 MPa, and fracture toughness of 5.72 MPa·m 1/2 . Crucially for electrode applications, the high densification facilitated the formation of a robust conductive network, resulting in a high electrical conductivity of 6.12 × 10 6 S/m. Regarding oxidation resistance, F − effectively reduced the viscosity of the glass phase protective layer. This enhanced flowability facilitated rapid self-healing of surface defects, resulting in significantly superior oxidation resistance compared to the Y 2 O 3 added composites. This work demonstrates that YF 3 is a highly effective sintering additive for tailoring ZrB 2 -SiC-based ceramic composites to fabricate high-performance ceramic electrodes.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2026
·
IF 6.3
Ruiqun Pan,Wenbo Han,Chenli Hou,Ling Weng,Lizhu Guan,Shihang Xu,Xiaorui Zhang,Xiaoming Wang,Hang Xu
The introduction of transition metal carbides has been shown to improve the oxidation resistance of ZrB 2 -SiC ceramics at moderate temperatures; however, their effectiveness under ultra-high temperature ablation conditions remains limited. In this work, nanoscale Ta 4 HfC 5 powder was synthesized at a low temperature (1400 °C) via a three-dimensional gel network, which enables ZrB 2 -SiC-Ta 4 HfC 5 ceramic to achieve high densification below 2000 °C. Oxyacetylene ablation tests at surface temperatures above 2100 °C demonstrated that the incorporation of Ta 4 HfC 5 significantly improved the ablation resistance, resulting in a dense and adherent oxide layer with a negative linear ablation rate. The improved ablation behavior was associated with the formation of multicomponent oxides during high-temperature oxidation, which contributed to the stabilization of the oxide scale. This study highlights the potential of Ta 4 HfC 5 as an effective functional additive for ZrB 2 –SiC-based ultra-high temperature ceramics.
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高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 7
·7694-7699
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IF 3.057
Anzhe Wang,Ping Hu,Bin Du,Cheng Fang,Dongyang Zhang,Xinghong Zhang
Crack initiation and propagation of ZrB 2 -SiC-Graphite (ZSG) sharp leading edges (SLEs) subjected to thermal shock were systematically evaluated by the water spraying method followed by a crack dyeing treatment. Distinct differences in the crack patterns among different test conditions were observed, and the cracking behavior of ZSG SLEs (including crack initiation time , crack number and critical failure temperature) was revealed to be strongly dependent on both the cooling rate and the microstructure. The crack propagation during thermal shock could be considered as a quasistatic process (crack speed was lower than 1 cm/s) that needed to be driven by continuous cooling.
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高影响因子
Journal of Materials Research and Technology-JMR&T
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2020
·
IF 5.289
Wei Wang,Yaping Liu,Gang Wang,Caiwang Tan,Wei Cao
In this study, the carbon fiber reinforced ZrB 2 -SiC composite ceramic was joined to Ti6Al4V alloy with Ag-Cu eutectic alloy filler at varied holding time and a fixed temperature of 800℃. Interface microstructure and shear strength of brazing joints were studied. The brazed ZSC f ceramics/AgCu/TC4 alloy is endowed with good metallurgical bondings. A typical interfacial structure of joints brazed for 10 min was found as ZSC f /TiC/Ti 5 Si 3 /Ag(s,s)/Cu(s,s) + TiC/TiCu/Ti 2 Cu/(TiC + TiCu)/TC4 alloy. Increase of holding time did not vary the precipitated phase of the joints but decreased thickness of the Ag(s, s) and Cu(s, s) reaction layer and gradually thickened the Ti-Cu reaction layer near the TC4 side. The formation process of reaction products was discussed in detail. The holding time substantially influenced shear strength of the joints. A maximum shear strength of 39 MPa was reached at a brazing time of 20 min.
研究领域:
材料科学
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焊接工程
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 51
·期 4
·4289-4299
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IF 5.1
Shidong Xie,Liangliang Tang,Bohua Duan,Zhuangzhi Wu,Dezhi Wang
In tungsten heavy alloys, the substitution of conventional binders with novel high entropy alloys and the addition of rare metal borides have demonstrated considerable promise in enhancing comprehensive performance. In this study, 95W-5CoCrFeNiMn - x ZrB 2 ( x = 0.1, 0.2, 0.4, 0.6, 0.8) was synthesized by powder metallurgy method and characterized. The results show that: the spherical tungsten grains are distributed in binder network, and the added ZrB 2 reacts with oxygen to generate ZrO 2 and B 2 O 3 , which will affect the microstructure and properties of the alloys. An increase of ZrB₂ content results in a reduction in alloy density, accompanied by an enhancement in hardness; the changes in grain size , contiguity, and solid volume fraction present a trend of first falling and then rising, and the minimum value is obtained when the addition is 0.4 wt%. At this time, 95WHEAs-0.4 ZrB 2 presents the best comprehensive performance, exhibiting an average grain size of 16.80 μm, a relative density of 96.10 %, a hardness of 411.68 HV 1 , and a compressive strength of 2457.64 MPa. The primary fracture mode observed in the alloys is W-binder interfacial separation, with a minor occurrence of tungsten cleavage when the ZrB 2 addition is within an optimal range.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 17
·29142-29152
·
IF 5.1
Xu Shen,Yu Zhang,Qin Ma,Shuang Mu,Shaoming Dong,Jinshan Yang
The oxidation property of liquid-phase sintered silicon carbide (LPS-SiC) ceramics with ZrB 2 addition was studied after oxidation test in air at 1400 °C. The results indicate that the addition of ZrB 2 decreased the degree of polymerization (DOP) of the silicate networks in the oxide layer, suppressing the additional oxidation caused by residual bubbles in the oxide layer of LPS-SiC, which bypassed the layer and directly corroded the material internally. After 100 h of oxidation, the additional oxidation depth was found to be 125 μm in the sample without ZrB 2 and 0 μm in those containing 10 wt% ZrB 2 . Simultaneously, the decrease in DOP facilitates the migration of crystalline phases. The generated ZrSiO 4 can migrate and aggregate at the interface between the surface oxide layer and the SiC/ZrB 2 matrix, forming a continuous ZrSiO 4 barrier. This impedes the diffusion of the oxidant and enhances the oxidation resistance . However, an insufficient ZrB 2 content leads to a discontinuous ZrSiO 4 layer, thereby weakening its protective effect. Simultaneously, a decrease in DOP increases the rate of oxygen diffusion, resulting in an increase in the oxidation layer thickness. This study contributes to a better understanding of the failure mechanisms of LPS-SiC in oxidizing environments and provide a reference for the design of oxidation-resistant LPS-SiC materials.
研究领域:
材料科学
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陶瓷
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高温材料
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氧化行为
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2026
·Vol. 109
·期 4
·e70699
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IF 4.2
Tingyu Yang,Jie Peng,Jianghao Liu,Tongfei Xie,Zhong Huang,Haijun Zhang,Xinyuan Chen,Zewen Wang,Shaowei Zhang
Owing to the absence of grain boundaries and their hindrance effects on stress transfer and electron/phonon transmissions, single-crystalline materials possess the theoretically-utmost physiochemical properties that are greatly superior to those of their poly-crystalline counterparts. However, due to their strong covalent-bonding strengths, which resulted in ultra-high melting points and extremely-low diffusion coefficients, single-crystalline IVB-VB transition-metal diborides with macroscopic-scale sizes cannot be obtained by the conventional methods for preparing single-crystalline materials. Herein, benefiting from the advanced molten salt method co-modified by the techniques of chemical doping, pre-compaction treatment, and microwave-radiation, submillimeter-scale V-doped ZrB 2 single-crystals with rod-like morphologies and aspect ratios up to 1000 were successfully prepared. And the necessitated processing conditions of 1473 K/40 min were remarkably milder than those of its counterpart methods. More importantly, the elastic modulus, electrical resistivities, and thermal conductivities of as-obtained (Zr 0.95 V 0.05 )B 2 single-crystals were determined to be up to 278.6 GPa, 21.6 µΩ·cm, and 56.3 W·m −1 ·K −1 , respectively, which obviously outperformed those of their poly-crystalline counterparts. This research was predicted to offer a promising route for energy-saving and highly-efficient preparation of single-crystalline IVB-VB transition-metal diborides with macroscopic-scale sizes and intrinsically exceptional physiochemical properties, thus satisfying the demands of directly utilized high-performance devices.
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高影响因子
Advances in Applied Ceramics
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2019
·
IF 1.429
Zhaofu Zhang,Jianjun Sha,Jixiang Dai,Yufei Zu,Zhaozhao Lv
To improve the fracture properties of ZrB2-based composites, SiC nanowires (SiCnw) were introduced into the powder mixtures via an in-situ growth method and the composites were fabricated by hot pressing. Microstructure observations found that the SiCnw with a diameter of less than 100 nm presented twisted morphology and homogeneously distributed among ceramic particles. It was also found that the SiCnw could inhibit the grain growth of ZrB2-based composites. Compared to that of composites without SiCnw, the fracture toughness and the work of fracture for the composites with SiCnw were 7.17 MPa m1/2 and 205 J m−2, which increased by 61.1% and 91.6%, respectively. The main enhancing mechanisms could be associated with the obvious crack deflection, crack branching and pull out of SiCnw. The SiCnw could refrain the crack opening and reduce the stress intensity in front of crack tips, which absorbed more energy and improved the fracture properties.
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高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 9
·096312
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IF 1.449
Junnan Zhang,Xuening Rong,Chang Xu,Aming Xie,Shuxin Deng
The developing of electrically conductive materials with extreme thermostability is of great importance in the field of microwaves absorption (MA). However, the dielectric loss of ZrB2 (a typical high-temperature and conducting ceramic) at microwave band still remains to be unexplored. In this paper, we systematically investigate the chemical structures, dielectric properties and MA performance of ZrB2 ceramic at microwave band. High MA performance can be achieved through the regulation of filler loading ratio of ZrB2, where the maximal absorption reaches −43.0 dB at 13.26 GHz at only 1.5 mm. A multi-polarization resonance loss is thought to be the main reason behind the excellent MA performance of ZrB2. This research opens up the exploration of high-temperature ceramic as MA materials.
研究领域:
材料科学
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电子工程
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高影响因子
CERAMICS INTERNATIONAL
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2023
·
IF 5.2
Zhibo Chen,Tohru S. Suzuki,Hailong Wang
High-aspect-ratio ZrB 2 rod crystals were synthesized via a molten-salt-mediated boro/carbothermal reduction using ZrOCl 2 · 8H 2 O/B 4 C/C as the raw material and NaCl as the flux material. This synthesis may improve the poor fracture toughness of monolithic ZrB 2 ceramics. X-ray diffraction and scanning electron microscopy confirmed that the heat-treatment temperature of 1550 °C and the addition of 50 wt% NaCl were the most effective in the preparation of ZrB 2 grains with a high aspect ratio. Thermogravimetric and differential scanning calorimetry was used to study the influence of NaCl addition, which increased the liquid-phase content. Finally, the growth of ZrB 2 grains along the c-axis into rod-like morphology at elevated temperatures was investigated by transmission electron microscopy . This work revealed that the addition of NaCl has a positive effect on the reducing of synthesis temperature and increasing of products particle size. The ZrB 2 rod crystals synthesized have diameters and aspect ratios of approximately 1 μm and 30, respectively.
研究领域:
材料科学
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陶瓷
·
晶体生长
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高影响因子
危险品化学品经营许可证（带存储）