CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Huan Yang,Cheng Fang,Hongliang Xu,Xia Zhang,Yang Liu,Jiayin Zhao,Anzhe Wang,Hongxia Lu,Hailong Wang
Controlled shrinkage of hydrothermal carbon coating (HTCC) during its carbonization preparation process offers a novel strategy for optimizing the interfacial properties of fiber-reinforced ceramic matrix materials. In this study, the effect of volumetric shrinkage in monolayer or bilayer HTCC on the interface characteristics and mechanical properties of C f /ZrB 2 -SiC composites is investigated. The bilayer HTCC significantly enhances the crack deflection effect within the interphase compared to the monolayer HTCC. By precisely controlling the shrinkage of the layers of the bilayer HTCC, an innovative C/SiC/C trilayer interphase was synthesized in situ during the polymer infiltration process for preparing the C f /ZrB 2 -SiC composites, which synergistically enhances stress dispersion and load transfer efficiency within the interface. The work of fracture for C f /ZrB 2 -SiC composites modified by the trilayer interphase has been significantly elevated to 2258 J/m 2 , which far exceeds the 129 J/m 2 measured for the composites lacking a HTCC interphase.
研究领域:
材料科学
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复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Yehong Cheng,Yuefeng Hu,Wenbo Han,Xinghong Zhang,Yumin Zhang,Huayu Zhang
Axially aligned fibrous monolithic ceramics present non-catastrophic fracture behavior via crack deflection and delamination along cell boundaries. However, severe in-plane anisotropy and time-consuming preparation procedures prevent their extensive promotion. The introduction of high content of weak phase components with poor oxidation resistance in weak interface destroys the excellent oxidation resistance of ceramic matrix. In this work, ZrB 2 -based short fibrous monolithic (SFM) ceramics with in-plane isotropic mechanical properties and excellent oxidation resistance were easily prepared by hot pressing randomly assembled short ceramic fibers . The microstructure and mechanical behavior of ZrB 2 -based SFM ceramics densified at various temperatures were systematically investigated. The mechanical properties of ZrB 2 -based SFM ceramics slightly improved with the increase of sintering temperature . ZrB 2 -based SFM ceramics exhibited excellent oxidation resistance and remained intact without macroscopic cracks after ablation for 615 s in oxyacetylene flame with maximum temperatures exceeding 2150 °C. The oxidation behavior was analyzed in detail.
研究领域:
材料科学
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陶瓷工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Kailei Xu,Yumin An,Zanchao Gao,Yehong Cheng,Libin Zhao
A method combining low-temperature demolding with precursor infiltration and pyrolysis (PIP) for preparing C f /SiC-ZrB 2 ceramic composites with bouligand structure is proposed. First, C f /SiC-ZrB 2 -PCS ceramic films were prepared using polycarbosilane (PCS), carbon fiber, and SiC-ZrB 2 ceramic particles through liquid nitrogen demolding technology. Then, C f /SiC-ZrB 2 green body with bouligand structure was achieved by helically assembled and pre-crosslinked C f /SiC-ZrB 2 -PCS ceramic films at a fixed angle. Finally, precursor infiltration and pyrolysis method was employed to densify the C f /SiC-ZrB 2 ceramic composites with bouligand structure using PCS. The mechanical properties of the composites with different carbon fiber contents were investigated, revealing that at a carbon fiber content of 30%, the composites exhibited a flexural strength of 358.9 MPa, a fracture toughness of 10.4 MPa·m 1/2 , and a work of fracture of 2445.4 J·m -2 . The toughening mechanism of C f /SiC-ZrB 2 ceramic composites with bouligand structure was elucidated through two-dimensional crack propagation analysis via scanning electron microscopy (SEM) with three-dimensional fracture network reconstruction using synchrotron X-ray computed tomography (CT).
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Yongsheng Liu,Guoxin Wei,Yawen Ma,Pengcheng Ma,Jianyong Tu,Jingxin Li,Yansong Liu,Shaolin Fu,Yejie Cao,Jian Chen,Yu Pan
In response to the urgent demand for ablation resistance and cost-effective thermal protection materials for hypersonic vehicles, this study employed a combined process of slurry injection and reactive melt infiltration to rapidly fabricate C f /ZrB 2 ‒SiC composites. The effects of infiltration temperature (1450°C‒1600°C) and holding time (0.5‒2.0 h) on the microstructure and mechanical properties were systematically investigated. Results demonstrate that at 1500°C, the competition mechanism between molten Si viscosity and reaction rate was balanced, achieving efficient pore filling. Composites processed at 1500°C for 1 h exhibited optimal mechanical properties, with a flexural strength of 234.08 MPa. As the holding time increased, elemental homogeneity improved in the matrix while mechanical properties decreased. The oxyacetylene ablation test (4.18 MW/m 2 ) showed: at 100 s, a dense ZrO 2 ‒SiO 2 oxide layer formed, resulting in ablation rates of 0.32 mg/s and 0.70 µm/s. After 300 s, thermal stress caused oxide layer spallation, elevating rates to 2.90 mg/s and 4.50 µm/s, triggering a new ablation cycle. The material demonstrates exceptional ablation resistance. This process provides a valuable reference for the low-cost fabrication of high-performance ultra-high temperature ceramic matrix composites.
研究领域:
材料科学
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陶瓷基复合材料
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航空航天工程
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高温材料
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制备工艺
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Yumin An,Mingyao Song,Kun Wan,Yongna Jia,Yi Yang,Yehong Cheng
The anisotropic friction properties of biomimetic C f /ZrB 2 -SiC ceramic composites with fibers disposed along Bouligand structures are analyzed. First, the friction properties parallel to and vertical to the hot-pressing surfaces are analyzed for the C f /ZrB 2 -SiC ceramic composites with different carbon fiber contents. The anisotropy of friction properties of the biomimetic C f /ZrB 2 -SiC ceramic composites with Bouligand structures is analyzed based on the microstructures of wear surfaces. Second, the anisotropic friction properties of biomimetic C f /ZrB 2 -SiC ceramic composites with Bouligand structures under high speed and wet conditions are also explored. Under various working environments, the wear mechanisms including abrasive wear , adhesive wear , oxidation wear, and fatigue wear are analyzed in detail based on the microstructures of the wear surfaces. This paper provides a good reference for analyzing the anisotropic friction properties of ceramic composites with Bouligand structures.
研究领域:
材料科学
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机械工程
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Boren Ke,Ji Zou,Weimin Wang,Wei Ji,Zhengyi Fu
ZrC-SiC-ZrB 2 ceramics were prepared via ultra-high pressure sintering under 15 GPa at 1200 °C. The densification mechanism, microstructures, and properties of the prepared ceramics were investigated. The sintered ceramics with ZrB 2 content of 15 vol % showed the improved comprehensive mechanical properties, including Vickers hardness of 26.6 GPa, Young's modulus of 469.1 GPa, and fracture toughness of 5.0 MPa·m 1/2 , which was 86.7 % higher than that of pure ZrC ceramics. In the sintered sample, the ultra-high pressure induced new microstructure, such as L-C lock in ZrC phase, stacking faults and nanotwins in SiC phase, and severe lattice distortion in ZrB 2 phase, jointly contributed to the improvement in Vickers hardness. Deflection and bridging during crack propagation were ascribed to the uniform combination of various phases.
研究领域:
材料科学
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陶瓷工程
·
力学性能
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ruiji Zhang,Fangwei Guo,Wenchen Zhang,Fei Pan,Xing Zhang
Ceramics containing profiled fiber-like additives (nanotubes, whiskers, etc.) show high mechanical properties. However, the toughening mechanism is debated due to its complex multi-scale microstructure. In this work, ZrB 2 (Z)-20 vol%SiC(S) spiral fibers (ZS sf ) were prepared by liquid rope effect and non-solvent induced phase separation, while quantitative relation of mechanical properties and structure were investigated by using SEVNB with femtosecond lasers and in-situ 3D-XRM simulation. The ZrB 2 -SiC composites with hierarchy ZS sf exhibited a ∼60 % increase in fracture toughness (5.45 MPa m 1/2 ) compared with blank composites, while the toughening efficiency of the hierarchy ZS sf increased over 2 times compared to the 1D and 2D toughening additives. The ZS sf with a thin graphite-like layer and spiral structure with hierarchy pores provided a torsional release effect that changed brittle fracture to the pseudoplastic fracture, where topological interlocking of 3D crimped structure hindered rapid cracking propagation. Additionally, the enhanced toughness was attributed to the uniform reconstruction of the stress field induced by hierarchical inner pores. The preserved 3D topological interlocking and uniform stress reconstruction lead to the highly stable fracture toughness of the ZS sf composites up to 1500 °C.
研究领域:
材料科学
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力学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2018
·
IF 3.794
Anzhe Wang,Bin Du,Ping Hu,Zhen Zhang,Xiong Sang
As a new type of notching approach, laser notching method always neglecting the significant impact of equivalent notch angle ( θ ) on fracture toughness results, although it has successfully solved the problem of introducing sharp enough V-notches in ceramics. Here, porous ZrB 2 and dense ZrB 2 -SiC ceramics are taken as the experimental targets, and the effect of θ on the fracture toughness values of these typical ceramics is investigated. To measure the fracture toughness accurately, the θ should be less than 60°, namely, the laser notch depth should be larger than the traditional U-groove root radius. Nanosecond laser notching method shows great advantages in high notch depth (easy to reach 300 μm) and sufficient accuracy (tip radius less than 1 μm), and is deemed to have a good prospect of standardization.
研究领域:
材料科学
·
机械工程
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Yuexing Chen,Xiang Ji,Chengshan Ji,Zhichao Shang,Tianyu Liu,Xuanru Ren,Jiaqi Zhu
In situ SiO 2 shells pre-establish oxygen-barrier networks in ZrB 2 -SiC coatings. • Core-shell ZrB 2 @SiO 2 improves interfacial continuity and particle packing. • Pre-positioned SiO 2 accelerates early-stage oxygen-barrier formation. • ZrO 2 and ZrSiO 4 dispersoids stabilize the borosilicate glass matrix. • ZrB 2 @SiO 2 -SiC lowers mass gain by 69% and gives 99.82% protection. Conventional ZrB 2 -based coatings rely on amorphous phases generated during oxidation to seal coating defects, which delays the establishment of an effective oxygen barrier. Here, an amorphous SiO 2 shell was constructed in situ on ZrB 2 particles through a sol-gel process, and the resulting core-shell powders were combined with SiC to prepare ZrB 2 @SiO 2 -SiC coatings. SiO 2 -free ZrB 2 -SiC and mechanically mixed ZrB 2 -SiO 2 -SiC were used as reference systems to distinguish the effect of SiO 2 incorporation from that of the core-shell configuration. Compared with the mechanically mixed system, the shell-derived phase became interconnected along ZrB 2 particle boundaries during sintering, improving interfacial continuity and suppressing particle agglomeration. During oxidation, this pre-connected SiO 2 phase combined with B 2 O 3 and SiO 2 generated by the oxidation of ZrB 2 and SiC, respectively, to promote the rapid formation and subsequent replenishment of a borosilicate glass network, while dispersed ZrO 2 and ZrSiO 4 helped preserve the continuity and structural stability of the resulting oxide scale. At 1973 K, this structure reduced the maximum mass gain to 0.62 × 10 −2 g·cm −2 , about 69% lower than that of the SiO 2 -free ZrB 2 -SiC system, and decreased the initial oxygen permeability by 83.23%, with the protection efficiency ultimately reaching 99.82%. This work provides an interface pre-encapsulation route for constructing continuous oxygen-barrier networks in ultra-high-temperature ceramic coatings.
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2013
·
IF 0
Wen Bo Han,Peng Wang,Yang Hou
ZrB2-based ceramic composites were prepared through hot-pressing at a temperature of 1880°C. An intragranular microstructure was achieved because of the existence of nanoSiC. In this paper, the mechanical properties of ceramic materials of ZrB2-SiC-G were studied, and the influence of intragranular microstructure on the mechanical properties was analyzed. The values of flexural strength and fracture toughness of ZrB2-20vol%SiCnp-15vol%G reached 551.9MPa and 5.25MPa·m1/2, respectively. Compared to ZrB2-20vol%SiC-15vol%G with micro-SiC, the fracture toughness was improved.
研究领域:
材料科学
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陶瓷
·
复合材料
·
机械工程
✓ 已验证
DOI
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 105
·期 4
·2385-2391
·
IF 3.784
Yumin An,Yi Yang,Yongna Jia,Wenbo Han,Yehong Cheng
Biomimetic Bouligand architecture is constructed in the ceramic to improve its toughness. Firstly, unidirectional carbon fiber-reinforced ZrB 2 -SiC ceramic films are achieved through a vacuum-assisted filtration method using graphene oxide. Then, ceramic films are helically assembled at a fixed angle of 30° in the graphite die based on the fiber orientation. Finally, the spark plasma sintering method was utilized to densify helical assembly carbon fiber/ceramic films. By constructing Bouligand structure, high fracture toughness (7.4 MPa·m 0.5 ) and work of fracture (∼1055 J/m 2 ) are achieved in ZrB 2 -based ceramic. The toughening mechanisms mainly are crack deflection, twisting and branching, carbon fiber pulling out, and bridging.
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
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
危险品化学品经营许可证（带存储）