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
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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
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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
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2025
·
IF 4.6
Dongliang Chu,Weiguo Sun,Longsuo Guo,Xiaojun Yang
We obtained a series of B 6 O, B 4 C, ZrB 2 crystals at a pressure of 6 GPa and temperature of 1673–1973 K. These crystals were characterized by XRD and SEM. At a pressure of 6 GPa, the minimum synthesis temperature for B 6 O is 1673 K. The grain size of B 6 O in all the samples remained consistent at around 30–50 nm, with a uniform distribution in each sample. The bonding force between B 6 O grains is weak, and the B 6 O grain size remains relatively stable, showing minimal change with increasing temperature and time. In the sample synthesized at 1973 K, B 6 O icosahedra (multiply twinned particles, MTPs) with a diameter of 12 μm, B 4 C particles with a diameter of 25 μm, and flaky ZrB 2 were observed. We conducted theoretical calculations on B 6 O and B 4 C using density functional theory (DFT).
研究领域:
材料科学
·
无机非金属材料
·
高压物理
·
计算材料学
·
结构表征
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Zhixiao Zhang,Jiachao Jin,Huijuan Pang,Jingbo Mu,Ruitong Chi,Yanming Wang,Yafeng Wang,Xiaoliang Zhang,Xiaorong Zhang
In this study, B 4 C@ZrB 2 core-shell powders were synthesized via a molten-salt method and subsequently consolidated with an Al 2 O 3 matrix by spark plasma sintering (SPS) to fabricate Al 2 O 3 -B 4 C@ZrB 2 composite ceramics. The core-shell architecture, consisting of a micron-sized B 4 C core coated with a submicron-thick ZrB 2 shell, was preserved in the sintered composites, forming well-defined composite toughening units. This unique geometric configuration, combined with multi-dimensional heterogeneities in phase composition (Al 2 O 3 /B 4 C/ZrB 2 ), grain size (micron/submicron), and thermal expansion coefficients (7.2/4.5/6.2 ×10 −6 K −1 ), actively induces multi-dimensional crack propagation: first along the Al 2 O 3 -ZrB 2 interface, then through the submicron‑thick ZrB 2 shell, along the micron‑sized B 4 C-ZrB 2 interface, out through the ZrB 2 shell again, and finally along the ZrB 2 -Al 2 O 3 interface before re-entering the Al 2 O 3 matrix. Such a shuttling behavior across multiple interfaces collectively dissipates substantial crack-propagation energy. The composite sintered at 1500 °C reached near-full densification (relative density 99.78 ± 0.12%) and exhibited excellent mechanical properties: Vickers hardness of 19.23 ± 0.19 GPa, flexural strength of 548 ± 31 MPa and fracture toughness of 6.79 ± 0.11 MPa·m 1/2 (indentation method) and 6.27 ± 0.42 MPa·m 1/2 (SENB method). This work provides a new strategy for developing high‑performance structural ceramics.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Chuntao Ge,Yong Yuan,Rong Li,Jie Li,Zhuo Zhao,Tao Zhu,Junjie Xu,Wenjuan Qi,Qian Kou,Jun Zhang,Saijun Xiao
Emerging as a highly promising technique, molten salt electrophoretic deposition (MS-EPD) enables the fabrication of protective ultra-high-temperature ZrB 2 coatings. However, its practical application has been constrained by the slow deposition rates (<0.4 μm/min) and limited coating thicknesses (<25 μm) achieved in conventional chloride or chlorofluoride-based molten salt systems. Herein, we reported a novel electrophoretic deposition (EPD) strategy that utilized a high-temperature fluoride molten salt system (NaF-AlF 3 , 1100 °C), which successfully overcame this kinetic limitation. This method generated ultrasmall ZrB 2 nanoparticles (NPs) with a mean particle size of 7.9 nm in the molten salt via an in-situ borothermal reduction reaction. Using these NPs as building units, a high deposition rate of 0.74 μm/min was achieved, enabling the fabrication of a fully dense, high-quality coating over 50 μm thick within 1 h. The resulting coating exhibited outstanding comprehensive properties including a nanoindentation hardness of 16 GPa, an elastic modulus of 172 GPa, and exceptional protection capability in an oxidizing environment at 1000 °C. Furthermore, this work revealed that the coating growth was dominated by an oriented attachment crystallization (OA) mechanism. This study not only established a novel pathway for the efficient and low-cost production of thick, high-performance ZrB 2 coatings, but also provided new fundamental insights into understanding and controlling the assembly behavior of nanocrystals in molten salt systems.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Xuechao Liu,Chunyan Shi,Jiashuai Wang,Bingbing Fan,Mao Chen,Hailong Wang,Binbin Wang,Wei Li,Yongqiang Chen
There has been an increasing demand for cutting tools with excellent strength, and high wear resistance due to the gradual application of high hardness materials such as high-temperature alloys and surface thermal spray coatings. This study proposes a new design of binder for polycrystalline cubic boron nitride (PcBN) composites. The effects of Al-ZrB 2 -TiC binders on the microstructural evolution, mechanical properties, and thermal shock resistance of the PcBN composites were systematically studied. Al melting at its relatively low temperature, which enables liquid-phase sintering, enhances grain bonding, and stimulates chemical interactions among the binder constituents. These reactions lead to the formation of new phases and promote strong grain bonding, resulting in good mechanical properties. In addition, increasing sintering temperature and cBN content are found to significantly improve the mechanical properties of PcBN composites. The PcBN composites exhibit excellent bending strength of 986.55 MPa, hardness of 42.09 GPa, relative density of 97.6 %, and fracture toughness of 7.66 MPa m 1/2 , respectively. After exposure to air at 1000 °C for 30 min followed by water quenching, the residual flexural strength remained as high as 866.89 MPa, indicating good thermal shock resistance.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 12
·17560-17569
·
IF 4.527
Jing Hu,Qi Li,Jianliang Xie,Peng Liu,Shaoliang Jiang,Xin Wang,Liangjun Yin,Li Zhang,Haipeng Lu,Linbo Zhang,Longjiang Deng
The high-temperature applications of zirconium diboride (ZrB 2 ) ceramics are hindered due to their easy initial oxidation at temperature around 700 °C. Although mixing and coating methods have been introduced to enhance the oxidation resistance of ZrB 2 -based ceramics, their thorough comparative analysis still demands a more systematic exploration. Herein, spark plasma sintered ZrB 2 @20 vol% LaF 3 and ZrB 2 +20 vol% LaF 3 ceramics prepared by coating and mixing powders, respectively, were used to study the influence of dispersion method of LaF 3 on their oxidation resistance. After oxidation at 1000 °C for 4 h, a thin oxide layer (~25 μm) and low weight gain (9%) confirmed the superior oxidation resistance of ZrB 2 +20 vol% LaF 3 over ZrB 2 @20 vol% LaF 3 , which could be attributed to the formation of a dense surface layer due to the self-healing mechanism. In turn, the poor oxidation resistance of ZrB 2 @20 vol% LaF 3 was caused by the “anchoring” of LaF 3 cladding layer and locally-coated ZrB 2 particles, which led to the in situ reactions and formation of a porous oxide scale (~400 μm). Finally, the discrepant oxidation resistance mechanisms of ZrB 2 –LaF 3 ceramics obtained by different dispersion methods of LaF 3 were proposed.
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DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Jing Hu,Peng Liu,Qi Li,Jianliang Xie,Shaoliang Jiang,Xianyu Jiang,Xin Wang,Li Zhang,Liangjun Yin,Haipeng Lu,Longjiang Deng
Good oxidation resistance of ZrB 2 -based coatings is highly desirable for successful high-temperature applications in thermal protection systems. Herein, ZrB 2 -LaF 3 coatings with different microstructure and morphology were prepared by high-enthalpy atmospheric plasma spraying . Particular attention was paid to the effect of spraying power on the physical properties and oxidation resistance of as-sprayed coatings. According to a thorough analysis, spraying power exerts influence on the melting degree and travelling speed of ZrB 2 -LaF 3 agglomerates in the flame during spraying process, thus affecting the microstructure, micro-topography and porosity/density of the coatings, and conclusively, leading to the difference of oxidation resistance . The coatings produced by the lower spraying powers (35 and 55 kW) revealed poor quality and the high degree of porosity with a large number of unmolten particles. Furthermore, these underwent severe oxidation due to the diffusion of oxygen through the pores. On the other hand, the use of excessive power (95 kW) deteriorated the quality of the coating due to drastic residual stress. In turn, the moderate spraying power (75 kW) was found to be optimum for achieving the coating with desirable characteristics, namely, fully molten particles at low porosity and residual stress, being thus beneficial for improving its oxidation resistance. This discovery is therefore beneficial for the practical applications of ZrB 2 -LaF 3 coatings.
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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）