ADVANCED ENGINEERING MATERIALS
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2023
·Vol. 25
·期 19
·2300391
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IF 3.6
Yuting Duan,Jincui Ren,Chaofeng Lv,Xinyi Li,Yisheng Wu
ZrB 2 –SiC coatings are prepared on the surface of graphite by slurry brushing method to improve the oxidation resistance. Effects of ZrB 2 content and polyvinyl butyral (PVB)–ethanol solution concentration on microstructure and static oxidation behavior of the ZrB 2 –SiC coatings are investigated at 1200 °C in air. The results indicate that increasing ZrB 2 content improves the oxidation resistance of the coatings. When ZrB 2 content increases from 30 to 45 wt%, weight loss rates of the coated samples after oxidation at 1200 °C for 120 min decrease from −0.92% to −1.67%. Increasing binder solution concentration raises component content in the coatings. As PVB–ethanol binder concentration increases from 0.025 to 0.075 g mL −1 , weight loss rates of the coated samples after oxidation at 1200 °C for 120 min decrease from 0.32% to −0.38%. Excellent oxidation resistance of ZrB 2 –SiC coating is attributed to self-sealing ability of B 2 O 3 and borosilicate glass. The composite glass can inhibit oxygen diffusion by filling defects in the coating promptly. The borosilicate glass phase can enhance the fluidity of the composite glass. ZrO 2 and ZrSiO 4 particles restrict the growth of the microcrack, which improves the oxidation resistance of ZrB 2 –SiC coating.
研究领域:
材料科学
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涂层技术
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Yaxiong Liu,Yehong Cheng,Denghao Ma,Ning Hu,Wenbo Han,Dazhao Liu,Shuai Wu,Yumin An,Anzhe Wang
As one of additive manufacturing techniques, direct ink writing has significant advantages in the manufacture of ceramic matrix composites , nevertheless, the poor impregnability of ceramic slurry makes it difficult to fill the interior of fiber bundles, causing poor mechanical properties . Here, ultrasound-assisted fiber separation technique was introduced to impregnate ceramic slurry with a continuous carbon fiber bundle during direct ink writing of continuous carbon fiber/ceramic green body and subsequent low temperature hot-pressing was combined to improve its robustness. Suitable thickness of carbon coating could bring to high fracture resistance, whereas excessively thick carbon coating will adversely affect the mechanical properties. A carbon interface with thickness around 110 nm was incorporated, the flexural strength , fracture toughness and work of fracture of C f /ZrB 2 -SiC composite reached 388.3 MPa, 10.04 MPa·m 1/2 and 2380 J/m 2 , respectively. Therefore, direct ink writing combined with low temperature hot-pressing, was effective to fabricate high-performance ceramic matrix composites.
研究领域:
材料科学
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制造工程
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Gui Li,Jianjie Hao,Jiayan Li,Pengyu Dai,Bo Wang,Yuanqi Li,Yi Tan,Xueqiang Cao
This work firstly evaluated the effect of temperature on the preparation of SiC coating using Al 2 O 3 as catalyst by pack cementation (PC) method. SiC/ZrB 2 -SiC-Si (ZSS) and SiC/ZrB 2 -SiC-Al 2 O 3 (ZSA) coating were prepared on the surface of C/C composites by PC combined with atmospheric plasma spraying (APS). The objective of this work is to study the influence of Si and Al 2 O 3 additives for ablation performances of ZrB 2 -SiC coating. The coated samples were subjected to ablation test, and the phase composition and microstructure evolution were investigated. The results indicated that SiC/ZSA coating had better ablation resistance because phase transformation and growth of ZrO 2 grain was restrained by Al 2 O 3 .
研究领域:
材料科学
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航空航天工程
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产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2021
·Vol. 10
·期 6
·1371-1380
·
IF 6.707
Lu Jun,Ni Dewei,Liao Chunjing,Zhou Haijun,Jiang Youlin,Chen Bowen,Zou Xuegang,Cai Feiyan,Ding Yusheng,Dong Shaoming
Fiber damage and uniform interphase preparation are the main challenges in conventional short fiber reinforced ceramic matrix composites. In this work, we develop a novel processing route in fabrication of short carbon fiber reinforced ZrB 2 -SiC composites (C sf /ZrB 2 -SiC) overcoming the above two issues. At first, C sf preforms with oriented designation and uniform PyC/SiC interphase are fabricated via direct ink writing (DIW) of short carbon fiber paste followed by chemical vapor infiltration. After that, ZrB 2 and SiC are introduced into the preforms by slurry impregnation and reactive melt infiltration, respectively. Microstructure evolution and optimization of the composites during fabrication are investigated in detail. The as-fabricated C sf /ZrB 2 -SiC composites have a bulk density of 2.47 g/cm 3 , with uniform weak interphase and without serious fiber damage. Consequently, non-brittle fracture occurs in the C sf /ZrB 2 -SiC composites with widespread toughening mechanisms such as crack deflection and bridging, interphase debonding, and fiber pull-out. This work provides a new opportunity to the material design and selection of short fiber reinforced composites.
研究领域:
材料科学
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复合材料工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Dongyang Zhang,Ping Hu,Shun Dong,Cheng Fang,Jiaxin Feng,Xinghong Zhang
The C f /ZrB 2 -SiC composite was successfully fabricated via brushing nano ZrB 2 -SiC slurry followed by low-temperature hot pressing technique, in which the UHTC phases were uniformly introduced into intrafascicular space of the subdivided fiber bundles. The fabricated composite exhibited a non-brittle fracture behavior and excellent mechanical properties with a high work of fracture of 1338 J/m 2 , one order of magnitude higher than that of the ZrB 2 -SiC ceramic, which was attributed to the hybrid toughening mechanisms such as crack deflection, fiber bridging, fiber pull-out and crack branching. The fiber/matrix interfaces were analyzed by the high resolution transmission electron microscopy , and no obvious chemical reaction was detected, suggesting the degradation of carbon fiber was effectively inhibited. Moreover, the C f /ZrB 2 -SiC composite showed a good thermal shock resistance with a thermal shock temperature difference of 764 °C, almost twice those of the ZrB 2 -SiC ceramic. This work provides a facile and effective approach to fabricate high-performance continuous carbon fiber reinforced ceramic composites with uniform component distribution.
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
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 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
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
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陶瓷工程
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2016
·Vol. 99
·期 6
·2131-2137
·
IF 2.787
YeHong Cheng,Yushi Qi,Ping Hu,Shanbao Zhou,Guiqing Chen,Jiadong An,Kunfeng Jin,Wenbo Han
To avoid introduction of milling media during ball-milling process and ensure uniform distribution of SiC and graphite in ZrB 2 matrix, ultrafine ZrB 2 –SiC–C composite powders were in-situ synthesized using inorganic–organic hybrid precursors of Zr(OPr) 4 , Si(OC 2 H 5 ) 4 , H 3 BO 3 , and excessive C 6 H 14 O 6 as source of zirconium, silicon, boron, and carbon, respectively. To inhabit grain growth, the ZrB 2 –SiC–C composite powders were densified by spark plasma sintering (SPS) at 1950°C for 10 min with the heating rate of 100°C/min. The precursor powders were investigated by thermogravimetric analysis–differential scanning calorimetry and Fourier transform infrared spectroscopy. The ceramic powders were analyzed by X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The lamellar substance was found and determined as graphite nanosheet by scanning electron microscopy, Raman spectrum, and X-ray diffraction. The SiC grains and graphite nanosheets distributed in ZrB 2 matrix uniformly and the grain sizes of ZrB 2 and SiC were about 5 μm and 2 μm, respectively. The carbon converted into graphite nanosheets under high temperature during the process of SPS. The presence of graphite nanosheets alters the load-displacement curves in the fracture process of ZrB 2 –SiC–G composite. A novel way was explored to prepare ZrB 2 –SiC–G composite by SPS of in-situ synthesized ZrB 2 –SiC–C composite powders.
研究领域:
材料科学
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陶瓷
·
纳米材料
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产品关联
DOI
高影响因子
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
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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
危险品化学品经营许可证（带存储）