CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fuping Li,Zhuoyang Fan,Wei Zheng,Wei Dang,Xinyuan Zhang,Kang Zhao,Yufei Tang
Titanium alloys are indispensable in aerospace, military equipment, and biomedical applications due to their excellent specific strength, corrosion resistance, and biocompatibility. However, their inherent poor wear resistance, such as a high friction coefficient and susceptibility to abrasive and adhesive wear, severely limits their practical use in tribologically critical scenarios like moving components. Improving the surface wear resistance of titanium alloys to expand their application range, extend service life, and meet the stringent requirements of high-end equipment manufacturing has become a crucial engineering objective. This paper proposes the use of polymer-derived ceramic (PDC) technology. Polycarbosilane-derived ceramic coatings with superior tribological performance enhanced by SiC whiskers were fabricated on titanium alloys through a dip coating method. The fabricated coatings consist of SiC and SiO 2 phases. Addition of SiC whiskers effectively suppresses macro-crack propagation and significantly reduces porosity and improves interfacial bonding. The friction coefficient and wear rate are 0.066 (56 % reduction compared to whisker-free coating) and 3.06 × 10 −5 mm 3 N −1 ·m −1 (51 % reduction), respectively, for coating enhanced by SiC whiskers, accompanied by narrower and shallower wear tracks. Tribological performance is governed by the formation of a smooth friction film from wear debris, which reduces friction and retards wear. SiC whiskers can inhibit friction film rupture through bridging, deflection, and pull-out mechanisms, thereby maintaining film integrity. This study has not only significantly enhanced the wear resistance of titanium alloy surfaces, but the developed SiC whisker-enhanced PCS-derived ceramic coating technology also demonstrates great application potential and industrial prospects, particularly in fields demanding high wear resistance, such as aerospace engine components and equipment serving in marine environments, due to its excellent tribological properties, simple processing and compatibility with complex-shaped substrates.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Hailong Cao,Boyang Hu,Yang Liu,Yujia Tan,Siyuan Huo,Yashan Huo
Lightweight CoSi/SiC/C hybrid nanofibers were fabricated via electrospinning followed by controlled pyrolysis. The pyrolysis temperature strongly influenced the microstructure and electromagnetic properties. The sample obtained at 1500 °C exhibited optimal performance, delivering a minimum reflection loss of −63.15 dB and an effective absorption bandwidth of 4.8 GHz at a thickness of only 1.5 mm. Structural analysis confirmed the formation of abundant heterogeneous interfaces (CoSi/SiC, C/SiC, and SiO x C y /C) and a graphitized carbon network, which synergistically enhanced interfacial polarization and conduction loss. Density functional theory calculations revealed interfacial charge transfer between CoSi and SiC, while radar cross-section simulations verified excellent stealth capability, with average RCS values below −12 dB m 2 at 10 and 12 GHz. These results demonstrate that interface-engineered CoSi/SiC/C nanofibers combine thin thickness, low filler content, and strong microwave absorption, highlighting their promise for next-generation electromagnetic wave absorbing and stealth materials.
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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
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DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2016
·
IF 1.34
Jun LI,Xin YANG,Zhe-an SU,Liang XUE,Ping ZHONG,Shuai-peng LI,Qi-zhong HUANG,Hong-wei LIU
C/C–ZrC–SiC composites with different ZrC–SiC contents were fabricated by precursor infiltration and pyrolysis. The effect of ceramic content on the microstructure and ablation resistance was investigated. Both the C/C–SiC and C/C–ZrC–SiC composites exhibited good ablation resistance under the plasma flame above 2300 °C. With the increase of ZrC content, a continuous oxide layer and a solid Zr–Si–O mesophase were formed during the ablation. And the structure of the formed oxides layer closely linked with the contents of ZrC–SiC ceramics. The solid ZrO 2 –ZrC and Zr–Si–O mesophase could increase the viscosity of SiO 2 moderately and improve the anti-scouring ability. The continuous SiO 2 –ZrO 2 –ZrC–SiC layer would serve as a thermal and oxygen barrier for preventing the substrate from further ablation. The C/C–ZrC–SiC composites with 27.2% ZrC and 7.56% SiC shows superior ablation resistance, and the mass and linear ablation rates are −3.51 mg/s and −1.88 μm/s, respectively.
研究领域:
材料科学
·
陶瓷基复合材料
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高温材料
·
烧蚀防护
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DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
Q. Xu,X. Liu,Q. Luo,Y. Song,H. Wang,M. Chen,Y. Xuan,Y. Li,Y. Ding
Phase change materials (PCMs) are regarded as one of the most promising candidates for thermal energy storage due to possessing large energy storage densities and maintaining nearly a constant temperature during charging/discharging processes. However, the intrinsically low thermal conductivity of PCMs has become a bottleneck for rapid energy transport and storage. Here, we present a strategy to achieve ultrafast solar and thermal energy storage based on biomorphic SiC skeletons embedded NaCl–KCl molten salts . A record-high thermal conductivity of 116 W/mK is achieved by replicating cellular structure of oak wood, leading to an ultrafast thermal energy storage rate compared with molten salts alone. By further decorating TiN nanoparticles on SiC skeletons, the solar absorptance is enhanced to be as high as 95.63% via exciting broadband plasmonic resonances. Excellent thermal transport and solar absorption properties enable designed composites to have bifunctional capabilities of harvesting both thermal energy and solar energy very rapidly. This work opens a new route for the design of bifunctional energy storage materials for ultrafast solar and thermal energy storage.
研究领域:
材料科学
·
能源化学
·
热物理学
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纳米材料学
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可再生能源工程
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DOI
高影响因子
RARE METALS
·
2026
·Vol. 45
·期 6
·e70334
·
IF 12.1
Zhi Song,Longhui He,Fanqi Meng,Hui Zhang,Lixi Wang
en This link goes to a English section zh This link goes to a Chinese section To address the demand for high-temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS 2 ) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure were successfully fabricated in this study via a hydrothermal method combined with directional freeze casting and thermal annealing processes. Microstructurally, the aerogel exhibits a “shish-kebab-like” heterostructure formed by MoS 2 nanosheets uniformly wrapping SiC nanofibers. Furthermore, the heat treatment process regulated the phase transformation of MoS 2 from the 1T phase to the 2H phase, retaining abundant defect sites. Benefiting from the significant anisotropy induced by the directional pore structure, the material demonstrates optimal impedance matching characteristics and dielectric loss capability when electromagnetic waves are incident parallel to the directional structure. The optimized MoS 2 @SiC-2 sample not only possesses an ultralight density (0.157 g cm −3 ) but also achieves superior microwave absorption performance in the X-band: a minimum reflection loss (RL min ) of −34.56 dB and an effective absorption bandwidth (EAB) covering the entire X-band (4.2 GHz). In addition, this unique three-dimensional directional lamellar structure endows the material with excellent thermal insulation performance, exhibiting a thermal conductivity as low as 0.057 W m −1 K −1 in the direction perpendicular to the directional structure, along with outstanding fire resistance and thermal shock resistance. Integrating high-efficiency electromagnetic stealth and thermal protection functions, this MoS 2 @SiC aerogel provides a novel design strategy for electromagnetic protection applications in harsh environments. 摘要(Chinese ): en This link goes to a English section zh This link goes to a Chinese section 针对复杂服役环境下对电磁波吸收材料高温稳定性、宽频强吸收及多功能集成的需求,本研究通过水热法结合定向冷冻铸造与热退火工艺,成功制备了具有定向层状互联结构的轻质二硫化钼(MoS 2 )负载碳化硅(SiC)纳米纤维复合气凝胶。该气凝胶在微观上呈现出由MoS 2 纳米片均匀包裹SiC纳米纤维形成的“糖葫芦”状异质结构,且热处理过程调控了MoS 2 从1T相向2H相的转变,保留了丰富的缺陷位点。得益于定向孔隙结构引发的显著各向异性,当电磁波平行于定向结构入射时,材料展现出最佳的阻抗匹配特性和介电损耗能力。优化后的MoS 2 @SiC-2样品不仅具有超轻密度(0.157 g cm −3 ),更在 X 波段实现了卓越的吸波性能:最小反射损耗(RL min )达到-34.56 dB,且有效吸收频宽(EAB)覆盖了整个 X 波段(4.2 GHz)。此外,独特的三维定向层板结构赋予了材料优异的隔热性能,垂直于定向结构方向的热导率低至 0.057 W m −1 K −1 ,并表现出出色的耐火性和抗热冲击性。这种集高效电磁隐身与热防护功能于一体的 MoS 2 @SiC气凝胶,为恶劣环境下的电磁防护应用提供了新的设计思路。
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DOI
高影响因子
Open Ceramics
·
2026
·
IF 3.4
Xingpu Hu,Zhaoran Li,Guoqi Liu,Fan Qian,Mao Chen,Yongqiang Chen
Side seal plates for thin-strip continuous casting require exceptional resistance to thermal shock, corrosion and wear, for which h-BN based ceramics serve as promising candidates. However, h-BN-ZrO 2 -SiC composites suffer from poor sintering densification. h-BN-ZrO 2 -SiC composites modified with varying amounts of B 2 O 3 as a single additive were prepared via vacuum hot-press sintering at 1550 °C, 1600 °C and 1650 °C. The phase composition, microstructure, relative density, flexural strength and thermal shock resistance were systematically investigated. The composite with 1 wt% B 2 O 3 sintered at 1650 °C achieved a flexural strength of 76.6 MPa, which was 42% higher than that of the additive‑free sample. The results revealed that B 2 O 3 facilitates the in-situ formation of ZrB 2 via a liquid‑phase sintering mechanism. This work clarified the modification mechanism of B 2 O 3 in h-BN-based composites, providing experimental basis and theoretical guidance for the development of h‑BN‑based ceramics used for side dams in thin‑strip continuous casting.
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DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Wenlei Sun,Zijing Li,Zhaoxiaohan Shi,Yuhua Miao,Manjie Chen,Jiaming Wen,Mengyao Cui,Limin Zhang,Xiaomeng Fan,Hongjing Wu
Ni 2+ -anchored PDA sites direct NiCo growth on SiC fiber fabrics. • Deposition time drives NiCo from nuclei/clusters to connected networks. • SiC@Ni-Co3 delivers 9.3 GHz EAB at 2.5 mm and -43.55 dB RL min at 2.2 mm. • Interconnected NiCo deposits enhance magnetic interactions among regions. • Dielectric-magnetic loss balance optimizes impedance matching. SiC fiber fabric is a promising lightweight candidate owing to its stability and woven architecture. However, pristine SiC fiber is typical dielectric absorbers and lacks intrinsic magnetic loss capability. Introducing magnetic components onto SiC fiber is an effective strategy. However, existing methods often have limited ability to regulate the growth and distribution, making it difficult to build magnetically coupled networks and thereby limiting the activation of magnetic loss and its matching with the intrinsic dielectric loss of SiC. Herein, NiCo-based magnetic components were controllably deposited on SiC fiber fabric through an electrochemical deposition strategy. Dopamine hydrochloride was used to immobilize Ni 2+ ions as active sites, facilitating the in situ formation and surface-confined growth of magnetic components on SiC fiber. By regulating the deposition time, the magnetic deposits underwent a transition from dispersed nuclei/clusters to interconnected networks and then to dense layers, progressively achieving impedance matching. The optimized SiC@Ni-Co3 sample, prepared by electrodeposition for 2000 s, formed an interconnected NiCo deposit structure that enhanced magnetic interactions among adjacent magnetic regions and promoted resonance-related magnetic dissipation and eddy-current-type loss. This structure enabled balanced dielectric-magnetic attenuation and improved impedance matching. Consequently, SiC@Ni-Co3 delivered an EAB of 9.3 GHz at 2.5 mm and an RL min of −43.55 dB at 2.2 mm. These findings provide useful guidance for engineering SiC fiber-supported magneto-dielectric architectures toward efficient electromagnetic wave absorption (EWA). Electrochemical deposition enables the evolution of NiCo-based magnetic deposits from isolated nanoparticles to interconnected networks on SiC fibers, achieving synergistic dielectric-magnetic losses and enhanced electromagnetic wave absorption. Download: Download high-res image (223KB) Download: Download full-size image
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DOI
高影响因子
RARE METALS
·
2020
·Vol. 40
·期 7
·1753-1761
·
IF 2.161
Li Jiang-Wei,Song Qi,Li Jiang-Bing,Yang Sheng-Chao,Gao Yan-Shan,Wang Qiang,Yu Feng
Abstract For better performances of Ni-based catalysts at low temperatures, Ni/SiC catalyst doped with a little amount of additive La was successfully prepared. The catalytic CO methanation activity tests showed that 3%La–Ni/SiC catalyst was excellent at a low reaction temperature (95.9% CO conversion and 85.1% CH 4 selectivity at 250 °C) with a superior stability compared with Ni/SiC (3.4% CO conversion and 0% CH 4 selectivity at 250 °C). This can be attributed to that the addition of La can markedly improve the dispersibility of active metal Ni and reduce the particle sizes of Ni nanoparticles or clusters, and can also regulate the interaction between active components and supports. Moreover, the high thermal conductivity and thermal stability could avoid the generation of hot spots in the catalyst bed. These results will promote the development of highly active Ni-based catalysts for the low-temperature methanation reaction. Graphic Abstract
研究领域:
催化
·
化学工程
·
材料科学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Qiankun Xu,Qingliang Shan,Jianbao Hu,Yewei Wang,Yu Wang,Qian Ma,Changrong Chen,Yuqian Zhou,Anze Shui
The oxidation property of SiC-B 4 C- x Al 2 O 3 ( x ranges from 0 wt% to 30 wt%) ceramics was studied in air at 1400 ℃. Results show that the porous oxide layer becomes dense and smooth with addition of Al 2 O 3 . When the content of Al 2 O 3 is proper, the DOP (degree of polymerization) of borosilicate network can be improved with increase of Al 2 O 3 content, inhibiting the migration of atoms and molecular groups. With that, the crystallization of SiO 2 and volatilization of B 2 O 3 can be restrained. When the content of Al 2 O 3 is excessive, the DOP of borosilicate network will be decreased, deteriorating the oxide layer morphology. It is believed that the damage of borosilicate network by excess Al 2 O 3 should be responsible for this phenomenon. In this research, the SiC-B 4 C ceramic with optimal oxidation resistant can be obtained when the content of Al 2 O 3 is 15 wt%.
研究领域:
材料科学
·
无机非金属材料
·
高温材料
·
表面工程
·
陶瓷学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 3
·1041-1048
·
IF 2.956
Xu Li,Xueliang Pei,Xiqiang Zhong,Gaoming Mo,Liu He,Zhengren Huang,Qing Huang
Liquid hyperbranched polycarbosilane (LHBPCS) is an excellent preceramic polymer of SiC. Before thermolysis, curing of LHBPCS is favorable for higher ceramic yield and molding. In order to avoid some unfavorable factors arising from traditional thermal curing, we introduced a free-radical initiator tert-butyl peroxybenzoate (TBPB) to trigger the crosslinking of allyl group on LHBPCS in this study. FT-IR, NMR and DSC measurements indicated only allyl group was consumed during the cross-linking process. The cross-linking reaction rate was monitored by a rotational rheometer, and results confirmed LHBPCS could be cured in 4 minutes with the help of 1 wt% TBPB at 80°C. TGA and SEM demonstrated the catalytic-cured LHBPCS had a high ceramic yield of 79.0 wt% and dense structure. The effect of TBPB on crystallization behavior of the obtained SiC was also explored by XRD, and little impact was detected. After 1600°C thermolysis, a near stoichiometric and crystalline SiC with ceramic yield of 77.5 wt% was obtained.
研究领域:
材料科学
·
高分子化学
·
陶瓷
·
无机化学
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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
危险品化学品经营许可证（带存储）