CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 6
·6037-6043
·
IF 2.986
Wenhu Hong,Ping Hu,Dongyang Zhang,Maosong Xie,Yang Yang,Shanyi Du
The ZrB 2 -SiC ceramics with homogenous microstructures were successfully fabricated by the optimized gel-casting method and pressureless sintering. The effects of the processing parameters, including the monomer content, cross-linker/monomer ratios, initiator addition, catalyst concentration and polymerization temperature, on the final gel properties were systematically investigated. The rheological behavior and stability of ZrB 2 -SiC suspensions were evaluated, and the microstructures and mechanical properties of sintered ceramics were also analyzed. The homogenous gel networks containing low monomer content (4 wt%) and without catalysts had been successfully obtained, which could be mainly attributed to the homogeneous distribution of crosslinking points and temperature-induced gelation . The crack-free and complex-shaped ZrB 2 -SiC ceramic composites were achieved by the optimized gel-casting, which could reach the highest relative density of 97.2% and the flexural strength of 402 ± 57 MPa, respectively. This study provides an optimized gel-casting process for fabricating ZrB 2 -SiC ceramics with excellent properties by low colloidal additives and without catalysts.
研究领域:
材料科学
·
陶瓷工程
·
复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
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.
✓ 已验证
DOI
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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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
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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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 7
·7694-7699
·
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.
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
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
·
焊接工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2019
·Vol. 16
·期 6
·2206-2213
·
IF 1.074
Mi Wang,Dewen Kong,Lingling Wang,Youbin Li,Ting Cai
The quasi-static, dynamic compression experiments and micromechanical model were employed to declare the dynamic compressive response of ZrB 2 –20%SiC composite at high-strain rates. The quasi-static compressive strengths were measured to determine the range of initial microcrack length in ZrB 2 –20%SiC composite. The effects of the strain rate on dynamic compressive strength, critical stain, as well as fracture mechanisms were discussed based on experimental results. Dynamic mechanical properties of ZrB 2 -based composites display obvious strain rate dependence. The dynamic increase factor in the compressive strength shows a rapid increase above a transition strain rate of 1228 s −1 . Moreover, a micromechanical model considering initial microcrack lengths is used to predict dynamic compressive strengths, which agree with the experimental results. Additionally, the critical strain has a linear increase tendency with the increase of strain rate. The dynamic compressive fracture mechanism of ZrB 2 –20%SiC composite is relative to the combination effect between strain rate and microstructure. The size of flaw distribution is critical below the transition strain rate resulting in bigger fragments, whereas the flaw density is primary with more and smaller fragments above the transition strain rate.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 16
·14488-14492
·
IF 2.986
Anzhe Wang,Ping Hu,Bin Du,Xinghong Zhang,Jiecai Han,Xiaoguang Luo
As a typical kind of multiple flaws, collinear flaws are particularly detrimental to the mechanical properties of ceramics. Here, two identical collinear micron-sized flaws with controllable length and spacing were successfully fabricated in ZrB 2 -20 vol% SiC (ZS) ceramic using femtosecond laser , and the effect of flaw length and spacing on flexural strength as well as fracture behavior (i.e., load-displacement curve and fractography) of ZS ceramic were investigated. The flexural strength almost remained constant when the flaw spacing was less than the critical value, which strongly depended on the flaw length, then increased gradually with increasing flaw spacing and reached a plateau. If the ratio between flaw spacing and flaw length was small enough, flaws would tend to coalescence first before fracture, owing to the strong interaction between flaws. If the ratio was too large, the center of the mirror area in fracture surface would be offset.
研究领域:
材料科学
·
陶瓷学
·
断裂力学
·
材料力学性能
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2013
·
IF 2.143
Rujie He,Xinghong Zhang,Ping Hu,Wenbo Han,Changqing Hong
In this paper, gelcasting and pressureless sintering of YAG gel coated ZrB 2 –SiC (YZS) composite were conducted. YAG gel coated ZrB 2 –SiC (YZS) suspension was firstly prepared through sol–gel route. Poly (acrylic acid) was used as dispersant . YZS suspension had the lowest viscosity when using 0.6 wt.% PAA as dispersant. Gelcasting was conducted based on AM–MBAM system. The gelcast YZS sample was then pressureless sintered to about 97% density. During sintering, YAG promoted the densification process from solid state sintering to liquid phase sintering . The average grain sizes of ZrB 2 and SiC in the YZS composite were 3.8 and 1.3 μm, respectively. The flexural strength , fracture toughness and microhardness were 375 ± 37 MPa, 4.13 ± 0.45 MPa m 1/2 and 14.1 ± 0.5 GPa, respectively.
研究领域:
材料科学
·
陶瓷
·
复合材料
·
烧结技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Zhenxiao Tang,Yuanming Zhou,Ruizhi Liu,Maozhong Yi,Ke Peng
The preparation of a ZrB 2 -SiC coating-matrix integrated C/C composite was achieved by a slurry method and precursor infiltration and pyrolysis. The obtained composites consisted of a SiC outer layer, a ZrB 2 -SiC inner layer and a C/C-ZrB 2 -SiC substrate. Compared with a composite without the ZrB 2 -SiC layer, the mass ablation rates of the composite were reduced by 14.8 %, 12.0 %, and 19.4 %, and the linear ablation rates were reduced by 41.3 %, 28.2 %, and 14 %, respectively, after ablation under an oxyacetylene flame with a heat flux of 4.18 MW/m 2 for 60 s, 120 s, and 300 s. During the ablation process, the SiC outer layer played a role in reducing the heating rate and surface temperature and promoting the sintering of ZrO 2 so that the oxide layer avoided peeling off under large thermal stress. The ZrB 2 -SiC inner layer acted as an oxygen, heat and flow barrier, reducing the oxidation rate of the substrate.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2012
·Vol. 39
·期 3
·2267-2274
·
IF 1.751
Rujie He,Ping Hu,Xinghong Zhang,Wenbo Han,Chuncheng Wei,Yang Hou
PEI was used as dispersant for ZrB 2 and SiC powders in water. The dispersion behavior of ZrB 2 and SiC in water was studied by zeta potential measurements , particle size distribution measurements and interparticle interaction calculations. Well-dispersed ZrB 2 and SiC aqueous suspensions were obtained using 0.6 wt% PEI at pH 6. The rheological behavior of ZrB 2 –SiC aqueous suspensions was also investigated. Finally, a high solid loading (52 vol%), low viscosity (980 mPa s at 100 s −1 ) ZrB 2 –SiC aqueous suspension was successfully prepared.
研究领域:
材料科学
·
陶瓷
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2015
·
IF 1.998
Wang Peng,Zhou Shanbao,Zhang Xinghong,Gui Kaixuan,Li Yongxia,An Jiadong,Han Wenbo
To protect graphite matrix from oxidation , B modified ZrB 2 –SiC coatings were prepared on SiC coated graphite by a two-step pack cementation . The microstructure, thermal cycling and oxidation resistant properties of the coatings were studied. The results show that the as-prepared coatings were mainly composed of SiC, ZrB 2 and Si. ZS50-1B, ZS50-3B and ZS50-5B showed good thermal cycling resistance with 97.4%, 98.2% and 98.6% weight retention after 15 thermal cycles between 1500 °C and room temperature. ZS50-7B and ZS50-9B showed good oxidation resistance with 93.5% and 97.5% weight retention after 19 h oxidation at 1500 °C.
研究领域:
材料科学
·
陶瓷涂层
·
高温氧化
·
热障涂层
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）