CERAMICS INTERNATIONAL
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2025
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IF 5.6
Jiamei Xu,Zijian Su,Jicheng Liu,Kun Lin,Yuanbo Zhang
With the improvement of industrial production requirements, the thermal shock resistance (TSR) of the materials used in industrial kilns plays a crucial role in ensuring efficient production. Aluminum-based heat storage ceramic balls (HSCB) are widely used in high-temperature industrial kilns, but they have a problem of weak TSR. A similar situation existed in the HSCB with corundum and Mg-Al spinel phases in our previous research. In this study, corundum-spinel-mullite HSCB was prepared using pre-treated secondary aluminum dross (SAD) as the main material at low roasting temperature. The effects of mullite content on the mechanical properties and microstructure of the HSCB were studied. Mullite whiskers were cross-distributed with corundum and Mg-Al spinel, which benefited the TSR. With the increase of mullite content, the structure of the HSCB gradually became loosely, the TSR increased and then decreased slightly, and linear crack density increased. When mullite content was about 25 %, the comprehensive performance of HSCB performed perfectly. Under the optimal conditions, the coefficient of thermal expansion of the HSCB was only 5.70 × 10 −6 K −1 , the thermal conductivity reached 3.35 W/(m·K) and the TSR was 34 times. This study aimed to provide a theoretical reference for the preparation of aluminum-based ceramic HSCB, as well as to improve the high-value utilization of SAD.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yiming Yu,Yaowu Wei,Conghua Peng,Yuan Chen,Junfeng Chen,Bingqiang Han
Y 2 O 3 materials have become a popular candidate for preparing refractory crucibles for ultra-pure high-temperature alloy melting in recent years. However, its difficulty in sintering and poor thermal shock resistance limited its industrial application. The effect of CaF 2 on the densification microstructure, mechanical properties , and thermal shock resistance of Y 2 O 3 materials was investigated in this paper. The main purpose of this study was to optimize the amount of CaF 2 added in the preparation of Y 2 O 3 materials to improve its thermal shock resistance and get better mechanical properties. The mechanism of the densification process of CaF 2 -doped Y 2 O 3 materials was analyzed by phase analysis and microstructure. The results showed that successive doping of large Ca 2+ ions caused more lattice distortion in the Y 2 O 3 materials, and the diffusion rate of Y 3+ was increased, thus enhanced grain boundary diffusion and promoted sintering densification in the Y 2 O 3 materials. Meanwhile, the addition of CaF 2 also significantly reduced the apparent porosity and enhanced the mechanical properties of the materials. The improvement of these properties was attributed to the increased relative density of CaF 2 -doped Y 2 O 3 materials and the high sintering activity of CaF 2 . In addition, crack deflections effectively improved the thermal shock resistance of the materials. The residual flexural strength ratio of Y 2 O 3 materials doped with 1 wt % CaF 2 was increased by 21.2% after thermal shock test compared with undoped specimens.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
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2023
·Vol. 21
·期 1
·427-437
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IF 2.1
Yulong Wang,Zhoufu Wang,Xitang Wang,Hao Liu,Yan Ma,Pengcheng Jiang,Yunjie Dong,Jiwei Niu
Short carbon fiber is a promising candidate for reinforcing carbon-containing refractories at the macro scale due to its excellent high-temperature stability and mechanical properties. In this work, the microstructure evolution of short carbon fiber and the effect of its addition on the properties of Al 2 O 3 –C refractories are investigated. The results show that adding short carbon fiber could affect the distribution of in situ ceramic phases, combined with the cross-scale reinforcement effect, leading to high strength—the CMOR of short carbon fiber containing refractories could be 23.0% higher than the free ones, while the HMOR could be 22.0% higher. Furthermore, the results suggest that the short carbon fiber containing refractories treated at 1400°C possesses high resistance to the initiation of crack propagation, which could be attributed to the high bonding strength brought by carbon fiber. Noteworthy, adding short carbon fiber could improve thermal shock resistance. The short carbon fiber containing refractories treated at 1300°C could possess a higher residual strength ratio than free ones. For instance, the specimen containing 0.1 wt% short carbon fiber shows the highest residual strength ratio (87.7%).
研究领域:
材料科学
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高温材料
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiawei Wang,Shuyuan Hui,Ruisong Guo,Xiaohong Sun,Jialin Bai,Hanlan Xu,Zhiyou Gong,Chaoyi Zheng,Guohua Shi,Xuming Lv
Addressing the issue of carbon contamination during the smelting of specialty metals or alloys, utilizing graphite crucibles, has attracted considerable research attention, prompting the exploration of novel ceramic crucible materials. AlN ceramic, renowned for their exceptional high-temperature stability and resistance to corrosion, have emerged as promising candidates to mitigate this concern. Nonetheless, the limited mechanical properties and thermal shock resistance of AlN curtail its widespread application. In this study, Y 2 Zr 2 O 7 was introduced as an additive to enhance AlN's properties, and AlN-based composite ceramics were fabricated by employing pressureless sintering. The effects of Y 2 Zr 2 O 7 addition (3–10 wt%) on the mechanical properties and thermal shock resistance of the resulting composites were examined. The findings revealed that the incorporation of 5 wt% Y 2 Zr 2 O 7 (AlN-5YZO) led to the highest relative density and a refined grain structure , resulting in superior mechanical properties. Notably, the flexural strength , fracture toughness, and Vickers hardness of AlN-5YZO reached 322 MPa, 3.70 MPa m 1/2 , and 13.34 GPa, respectively. Furthermore, the presence of crack branching and crack deflection within the composite ceramics impeded crack propagation , effectively augmenting their thermal shock resistance. AlN-5YZO samples exhibited residual strength retention rates of 91.0 %, 84.2 %, and 76.7 % after 10, 20, and 50 thermal shocks between 1000 and 1600 °C, surpassing those of pure AlN. The findings of this study present promising avenues for advancing crucible materials tailored for high-temperature applications.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
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2024
·
IF 1.8
Yiming Yu,Yaowu Wei,Kui Liu,Bo Chen,Junfeng Chen
This paper aims to improve the density and thermal shock resistance of Y 2 O 3 ceramics for the preparation of ultra-pure high-temperature alloy crucible materials. The doping effect of MgF 2 content on the densification behavior, physical properties, and thermal shock resistance of Y 2 O 3 ceramics was systematically investigated in this paper. The results suggested that the presence of MgF 2 greatly promoted the growth of Y 2 O 3 grains and the transformation of the pore structure by liquid-phase sintering. And the mechanical properties of the MgF 2 -doped Y 2 O 3 ceramics were significantly improved. Besides, the marked improvement in the thermal shock resistance of MgF 2 -doped Y 2 O 3 ceramics was attributed to the synergistic action resulting from the growth of grain size and the enhancement of the crack deflection effect. In particular, the relative density of Y 2 O 3 ceramics doped with 1.5 wt% MgF 2 reached 96.4% and the residual flexural strength ratio after thermal shock achieved 45.0%, showing an excellent application prospect.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2016
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IF 2.101
Dong Feng,Xudong Luo,Guodong Zhang,Zhipeng Xie
In order to determine the relationship between the property of MgOAl 2 O 3 SiO 2 composite ceramics and molar ratios of MgO/Al 2 O 3 , especially the sintering behavior and thermal shock resistance, the MgOAl 2 O 3 SiO 2 composite ceramics were fabricated with micro-size MgO , Al 2 O 3 powder and nano-size SiO 2 as main raw materials. The sample was characterized by phase analysis, densification and thermal shock times. Moreover, field emission scanning electron microscope was also conducted to study microstructure of the samples before and after thermal shock. Effect of different molar ratios of MgO/Al 2 O 3 on the sintering behavior and thermal shock resistance of composite ceramics were investigated. The results showed that the sample possess better sintering behavior and thermal shock resistance with the molar ratio of MgO/Al 2 O 3 equal to 2/1. Grains of periclase and spinel were directly bonded together, resulting in a dense and compact microstructure, and the bulk density of obtained sample reached 3.4 g/cm 3 . The microstructure of sample after thermal shock revealed that the crack propagation path was deflected and bifurcated, the main-crack propagation was restricted and more fracture energy was consumed, the thermal shock resistance of composite ceramics was greatly improved.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
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2025
·
IF 2.3
Yulong Wang,Zhoufu Wang,Xitang Wang,Hao Liu,Yan Ma,Yunjie Dong,Shenghao Zeng
Short carbon fibers were treated with an ultrasonic-enhanced liquid-phase oxidation method and introduced into Al 2 O 3 -C refractories. The effects of different liquid-phase preoxidized carbon fibers on the mechanical properties and thermal shock resistance of the refractories were compared and investigated. The results indicate that ultrasonic-enhanced liquid-phase preoxidation can effectively modify the surface of carbon fibers, thereby affecting the structural evolution and usage effect of carbon fibers in Al 2 O 3 -C refractories. Appropriate liquid-phase preoxidation treatment for carbon fibers can enhance their strengthening effect on the mechanical properties of Al 2 O 3 -C refractories. After the addition of carbon fibers treated with liquid-phase preoxidation for 20 min, compared to the refractories without carbon fibers, the cold modulus of rupture, cold crushing strength, and hot modulus of rupture of Al 2 O 3 -C refractories (after 1300°C heat treatment) increased by 15.4%, 10.3%, and 36.7%, respectively. Furthermore, the introduction of liquid-phase preoxidized carbon fibers can have a positive effect on the thermal shock resistance and toughness ratio of Al 2 O 3 -C refractories.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Anzhe Wang,Ping Hu,Xinghong Zhang,Dongyang Zhang,Cheng Fang
Reliable evaluation of the thermal shock behavior of complex-shaped components is very important for ultra-high temperature ceramics. Unfortunately progress in this field is hampered by a lack of available experimental methods. Here, a novel water spraying method is proposed to investigate the thermal shock behavior of ZrB 2 -based sharp leading edges (SLEs). Results indicated that the introduction of graphite flakes significantly improved the thermal shock resistance of ZrB 2 -SiC (ZS) SLEs. However, owing to the anisotropies of microstructure and thermal conductivity of ZrB 2 -SiC-G (ZSG) ceramic, the thermal shock resistance and the failure mode of ZSG SLEs were sensitive to the sampling orientation, which also were remarkably influenced by the size and/or shape of SLEs, leading to the variability of critical failure temperature from 750 °C to 375 °C and crack patterns from deflection to wave-shaped.
研究领域:
材料科学
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高温陶瓷研究
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Chao Wang,Xu Wang,Binglei Wang,Guozheng Xiao,Ruiqing Qiao,Fan Zhang,Yu Bai,Yizhuo Li,Yusheng Wu,Zhanjie Wang,Hongjie Wang
A dense β-Si 3 N 4 coating toughened by β-Si 3 N 4 nanowires/nanobelts was prepared by a combined technique involving chemical vapor deposition and reactive melt infiltration to protect porous Si 3 N 4 ceramics in this work. A porous β-Si 3 N 4 nanowires/nanobelts layer was synthesized in situ on porous Si 3 N 4 ceramics by chemical vapor deposition, and then Y–Si–Al–O–N silicate liquid was infiltrated into the porous layer by reactive melt infiltration to form a dense composite coating . The coating consisted of well-dispersion β-Si 3 N 4 nanowires/nanobelts, fine β-Si 3 N 4 particles and small amount of silicate glass . The testing results revealed that as-prepared coating displayed a relatively high fracture toughness, which was up to 7.9 ± 0.05 MPa m 1/2 , and it is of great significance to improve thermal shock resistance of the coating. After thermal cycling for 15 times at ΔT = 1200 °C, the coated porous Si 3 N 4 ceramics still had a high residual strength ratio of 82.2%, and its water absorption increased only to 6.21% from 3.47%. The results will be a solid foundation for the application of the coating in long-period extreme high temperature environment.
研究领域:
材料科学
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表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
·
IF 4.495
Yehong Cheng,Yaxiong Liu,Yumin An,Ning Hu
Graphene derivative materials exhibit excellent mechanical and thermal properties, which have been extensively used to toughen ceramics and improve thermal shock resistance . To overcome the thermal agglomeration of graphene oxide (GO) during heating and drying process, ZrB 2 -SiC particles decorated GO hybrid foam with uniformly anchored ceramic particles was synthesized by electrostatic self-assembly and liquid nitrogen-assisted freeze-drying process. Densified rGO/ZrB 2 -SiC ceramics with varying microstructure, thermal physical and mechanical properties were obtained by adjusting the content of decorated ceramic particles. Although the flexural strength of rGO/ZrB 2 -SiC ceramics have an attenuation compared with that of ZrB 2 -SiC ceramic, the thermal conductivity , work of fracture and thermal shock resistance are greatly improved. rGO/ZrB 2 -SiC ceramics exhibit delayed fracture and increasing R-curve behavior during the crack propagation . The novel preparation technology allows for the well dispersion of rGO in ZrB 2 -SiC ceramics and can be easily extended to other ceramic or metal materials systems.
研究领域:
材料科学
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工程学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Wenmin Zhang,Cheng Peng,Defang Liu,Yangfang Cheng,Jianqing Wu
In order to improve the gas permeability and thermal shock resistance of the ceramic membranes applied in high temperature gas-solid separation techniques, fused silica and graphite particles were used as the primary raw material and pore-former agent, and the spray coating based-on PVA sealing was applied to prepare the separation membrane. These approaches remarkably decreases filtration resistance by increasing support permeability and reducing the intrusion of ceramic membrane forming particles into the support as well as the thickness of the membrane. The fabricated membrane had an average pore diameter of 9.85 μm and a gas permeability value of 8.2 × 10 4 m 3 /(m 2 h bar), its dust removal efficiency reached 98.6%.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jianfeng Huang,Haowen Fan,Xuetao Shen,Xinzi Zhong,Liyun Cao,Meng Yuan,Hang Yan,Tian Ji,Mingxin Liu,Yong Zhao,Yijun Liu
To improve the oxidation resistance of carbon/carbon (C/C) composites at intermediate temperatures, we present a novel design concept for an antioxidative coating that incorporates ceramic microcapsules engineered for self-healing and in situ toughening. These microcapsules, featuring a SiB 6 @Al 2 O 3 core-shell structure, were synthesized via a sol-gel process and embedded into a SiB 6 @Al 2 O 3 -SiC-C/C composite through dip-coating. Upon crack formation, the microcapsules rupture, releasing a healing agent that facilitates crack closure. Concurrently, the oxidation product SiO 2 from the core reacts with Al 2 O 3 , forming mullite whiskers at the damage site, thereby enhancing toughness. This combined self-healing and toughening mechanism significantly enhances the antioxidative performance of the coating. After 540 hours of exposure to an oxidizing environment at 1573 K, the coating demonstrated minimal oxidation, with a weight loss of just 0.27% and a specific weight loss of 6.80×10 -4 g/cm 2 .
研究领域:
材料科学
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化学工程
✓ 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）