CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Yu Hui,Sumei Zhao,Jiaying Xu,Binglin Zou,Ying Wang,Xiaolong Cai,Ling Zhu,Xueqiang Cao
Degradation due to molten salt attack is one of the failure mechanisms of thermal barrier coatings . Thermochemical attack of the salt mixture Na 2 SO 4 –30 mol% NaVO 3 on ZrO 2 –8 mol% YO 1.5 (8YSZ) at 1100 °C for different times was investigated. In the present study, 8YSZ powder was synthesized using co-precipitation route. The graded morphologies and phase compositions were examined using SEM, XRD and Raman before and after hot corrosion test. The results obtained from XRD have shown that m-ZrO 2 and YVO 4 were the main corrosion products after hot corrosion test at 1100 °C. The results obtained from SEM and EDS observations have shown that large polyhedron crystals of m-ZrO 2 and rod-like crystals of YVO 4 formed as hot corrosion products after hot corrosion test for 6 h and 24 h. The phase transformation and chemical interaction are the primary corrosion mechanisms for degradation of 8YSZ ceramic.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Min Wei Boey,Shahid Ali Khan,Xiaolu Li,Jiawei Sun,Muhammad Usman Farid,Alicia Kyoungjin An
The increasing demand for freshwater resources has positioned desalination technologies as essential for sustainable water management. Hence, exploring the applications of membrane distillation (MD) to reduce heat loss and enhance process efficiency becomes crucial in meeting the growing water needs. Zirconia ceramic, with its highly porous structure, high-temperature resistance, and superior heat-insulating properties, plays a significant contribution in the development of low thermal conductivity membranes. This study introduces the fabrication of a low thermal conductivity membrane by integrating flexible zirconia ceramic nanofibers through electrospinning and subsequent calcination. The ceramic composite membrane exhibited a reduced thermal conductivity of 0.044 W m −1 K −1 in contrast to polymer membranes, which is essential for mitigating conductive heat transfer within the membrane. Evaluation of the desalination performance of the ceramic composite membranes revealed a permeate flux of 32.1 LMH for the optimized membrane (f-CPM2) operating with a saline feed solution at 60 °C. Furthermore, investigations of the membrane’s heat-insulating properties were enhanced by temperature measurements taken during MD operation and computational fluid dynamics (CFD) analysis. The temperature reduction at the f-CPM2 membrane surface near the outlet demonstrated a slight reduction of only 2.8 %, whereas the polymer membrane exhibited a substantial reduction of 14.7 % relative to the bulk inlet stream temperature. The CFD analysis provided insights into temperature and velocity distribution, enhancing our understanding of thermal efficiency and fluid dynamics within the MD process.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jingru Xin,Xinlei Ding,Wei Guo,Xinrong Li,Kaizhi Yan,Yuxin Wang
The ZrO 2 ceramics was successfully brazed by the newly designed bismuth-borate glass. The mechanism which is influenced by holding time and cooling rate on morphology and mechanical performance of joints were thoroughly analyzed under 675 °C. The study introduced an innovative bismuth-borate glass composition as the brazing material, providing an effective solution for high-strength joint formation in ZrO 2 ceramics. The findings showed that when brazing temperature was 675 °C, well-formed joints were obtained under 0–90 min and cooling rate range of air cooling or slower, whiskers of Al 4 B 2 O 9 and crystals of Al 5 BO 9 were observed in the joints, with their number and size increasing as the holding time extended and the cooling rate decreased. Systematic analysis demonstrated that the optimized process parameters, including a holding time of 30 min and a controlled cooling rate of 3 °C/min, resulted in a maximum shear strength of 83 MPa. The joint formed under these conditions was a reinforced composite consisting of aluminum borate crystals. The joint of ZrO 2 ceramics brazed with Bismuth oxide-Boron oxide-Aluminium oxide (50Bi 2 O 3 -45B 2 O 3 -5Al 2 O 3 ) glass is the reinforced composite joint consisting of aluminum borate crystals.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Guocheng Ma,Huihui Zhang,Chengyu Wang,Haibo Wu,Ming Yuan,Xuejian Liu,Zhengren Huang
In this study, high-performance zirconium carbide (ZrC) ceramics prepared by gel-casting method were reported for the first time. A water-based slurry with 40 vol% solids was prepared using TMAH and PVP as dispersants, and the resulting green body had a flexural strength of 21.11 ± 1.84 MPa after curing, which was sufficient for machining. Dense ZrC ceramics (relative density >97 %) were obtained by sintering at 2000 °C under atmospheric pressure, and a 387 ± 23.21 MPa flexural strength and 15.48 ± 0.28 GPa hardness were achieved. This study offers a new strategy for preparing ZrC ceramics with complex structures.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yi Ding,Zhengdi Jiang,Yanjun Li,Hui Dan,Xirui Lu,Yushan Yang,Tao Duan
Zircon , ZrSiO 4 , has a structure that can incorporate actinides. Therefore, the susceptibility of the zircon structure to irradiation damage has been investigated by accelerated irradiation experiments. Synthetic Zr 1− x Nd x SiO 4− x /2 ( x = 0, 0.01, 0.10) ceramics were irradiated with 0.5 MeV 4 He 2+ ions (fluences 1 × 10 14 –1 × 10 17 ions/cm 2 ) at room temperature. The irradiation effects on phase structure and chemical stability of the ceramics were investigated. It is found that the main crystal structure is maintained, however, little amorphization is leaded as a result of intensified irradiation. Raman spectra reveal that the main peaks slightly broaden and weakened with increasing fluence, indicating little amorphization has been induced by irradiation. The irradiation resistance is enhanced by the growing neodymium content. Moreover, microtopography and element distribution have no changed even after irradiation. Although the LR Nd increases slightly with increasing Nd loading and irradiation, the excellent chemical stability (∼10 −4 g m −2 d −1 ) is maintained.
研究领域:
材料科学
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核科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Tingting Xu,Wei Wang
A novel 3D printing process based on material extrusion has recently been developed for the preparation of high-quality zirconia-based ceramics with complex configurations. Nevertheless, the attainment of the optimal mechanical properties of 3D-printed zirconia ceramics for advanced engineering applications remains a significant challenge, largely due to the considerable variability in process conditions. In this study, zirconia ceramics with different filling strategies were prepared using direct ink writing technology. The impact of various filling parameters, including nozzle diameter and printing direction, on the sintering shrinkage evolution, surface topography and mechanical properties was examined. To ensure the accuracy of mechanical tests, all the zirconia ceramics were densely sintered to a relative density of above 98 %. The utilization of thinner needles and printing along short distances has been demonstrated to markedly reduce the surface roughness of the printed ceramics. Furthermore, the flexural strength of the ceramics printed along the long-distance direction was found to be the highest, while all the ceramics printed with a medium diameter of nozzle achieved the optimal flexural strength under the same printing paths. These results suggest that optimizing the printing accuracy and path is an effective method for obtaining dense ceramics with superior surface topography and mechanical performance through direct ink writing technology.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2019
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IF 4.081
Keqiang Zhang,Rujie He,Guojiao Ding,Chengwei Feng,Weidong Song,Daining Fang
3Y-TZP strengthened ZrO 2 ceramics were fabricated by using digital light processing (DLP) based additive manufacturing . The effects of 3Y-TZP concentration on the relative density, linear shrinkage, microstructure, and mechanical properties of the DLP-prepared ZrO 2 ceramic were investigated in detailed. High precision ZrO 2 ceramic parts with lattice structure with parts were successfully prepared by using DLP. The highest relative density and flexural strength were 96.40% and 306.53 ± 6.03 MPa, respectively, when the 3Y-TZP concentration was 7.5 vol%. The strengthening mechanism was discussed in detailed.
研究领域:
材料科学
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 1
·015403
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IF 1.62
Xiaoguang Xia,Guolin Duan
High solid loading water-based zirconia slurries for direct ink writing had been successfully prepared in this paper. The water-soluble epoxy resin and sodium polyacrylate were used as the binder and dispersant, respectively. The effect of solid loading on the rheological properties of zirconia slurries was systematically investigated. The 54–58 vol.% zirconia slurries exhibited suitable printability for direct ink writing. After sintering at 1550 °C for 2 h, the properties of sintered zirconia ceramic specimens including linear shrinkage, relative density, flexural strength, tensile strength and microstructure were examined by a series of test methods. Further, the intrinsic relationships between the solid loading and physical and mechanical properties of zirconia ceramic specimens were explored. The experimental results showed that the densification and strength of sintered zirconia ceramic could be significantly improved by increasing the solid loading of zirconia due to the less content of organic matter and water. The maximum relative density, flexural strength and tensile strength of the sintered specimens were 98.8% ,676 ± 10 MPa and 92 ± 5 MPa, respectively, when the zirconia solid loading was 58 vol.%.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
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IF 5.8
Peng Yang,Fang Peng,Xiong Xiao,Jie Chen,Haidong Long,Ruiqi He,Wenjia Liang,Ling Ran,Peihong He
Pure polycrystalline zirconium carbide (ZrC) ceramics were fabricated using high-pressure and high-temperature (HPHT) methods, and a systematic and comprehensive study of their properties was conducted. ZrC ceramics sintered at 5.0 GPa pressure and 1300 °C displayed optimal properties, with a Vickers hardness of 27.4 GPa and an indentation fracture toughness of 4.3 MPa·m 1/2 , which are 29 % and 39 % higher than the reported experimental data, respectively. Additionally, they had an average grain size of approximately 425 ± 153 nm, a relative density near 98.5 %, a Young's modulus of 412 GPa and an oxidation onset temperature of 713 ℃. This study offers critical insights into the sintering of pure, polycrystalline and fine-grained ceramics and provides a preparation method for improving the mechanical properties of other new ultra-high temperature ceramics (UHTCs).
研究领域:
材料科学
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陶瓷工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ya-Nan Feng,Fei-Fan Wang,Weiwei Xiao,Yan Xia,Bin Wei,Shuaihua Wang,Zhonghua Deng,Fei-Fei Chen,Lingyun Li,Yan Yu
In this study, divalent calcium cation with large radius and trivalent yttrium cation with small radius were introduced to develop co-stabilized zirconia ceramics with both superior mechanical properties and aging resistance. Through a reverse coprecipitation-hydrothermal method, a series of ultrafine x CaO- y Y 2 O 3 -ZrO 2 ( x = 2.0, 3.0, y = 0.5, 1.0, 1.5, 2.0 ) raw powders with high quality were fabricated for the production of nanostructured ceramics via low-temperature pressurelessly sintering. The sintering process was optimized by investigating the effects of sintering temperature on densification, grain growth and phase evolution. The minimally doped 2.0 CaO- 0.5 Y 2 O 3 -ZrO 2 ceramic retained pure tetragonal phase at room temperature, achieving a balance of excellent toughness and high aging resistance. The impacts of chemical composition on microstructure, hardness, toughness and aging resistance were examined for these x CaO- y Y 2 O 3 -ZrO 2 ( x = 2.0, 3.0, y = 0.5, 1.0, 1.5, 2.0 ) ceramics. The segregation of calcium and yttrium cations at grain boundaries effectively tailored the microstructure. It was observed that substituting small trivalent yttrium cations for large divalent calcium cations effectively enhanced the aging resistance without sacrificing mechanical properties, due to the strengthened grain boundaries and asymmetrical distribution of cations among grains. This work not only produces low-doped zirconia ceramics with both excellent mechanical properties and aging resistance, but also presents straightforward method for preparation of high-quality raw powders and delicate microstructural engineering during sintering for developing advanced structural ceramics.
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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wei Wan,Linjun Cao,Shuang Yin,Junrong Luo,Yeming Zhang,Jiaxu Zhang,Yuejun Ouyang
Zircon (ZrSiO 4 ) ceramics are highly valued in various industries due to their exceptional physical and chemical properties. In the present work, zircon ceramics with high-density and desirable mechanical properties were successfully prepared using an aqueous gelcasting method, involving the use of a low-toxic and water-soluble monomer, N,N -dimethylacrylamide (DMAA), as the binder. A high solid loading and low viscosity zircon slurry was achieved by optimizing the pH and the dosage of the ammonium polyacrylate (PAA-NH 3 ) dispersant. Zircon green bodies fabricated through the gelcasting method exhibited uniform microstructures and relatively high mechanical strength exceeding 11.0 MPa. The impact of solid loading on the density, decomposition, flexural strength , micro-hardness, and microstructure of the final ceramics were carefully studied. Notably, the ceramics, prepared by solidifying the slurry with a 45 vol% solid loading and sintering the green body at 1550 °C for 2 h, exhibited a relative density of 96.3 %, high phase purity, a uniform microstructure, and the highest flexural strength of 407.9 MPa. The results demonstrate that mechanically robust dense zircon ceramics can be effectively prepared using the low-toxic gelcasting method.
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
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Bohan Wang,Wenjun Yu,Le Fu
Given the pressing clinical need, the market for artificial bone scaffolds in orthopedics is growing at a rapid rate. In the past, ZrO 2 -based biomaterials intended for implantation were dense and ‘bio-inert’. Material scientists have now shifted toward the design of deliberately porous and ‘bioactive’ ZrO 2 -based biomaterials that integrate with human cells and tissues. In this study, we designed and prepared porous and bioactive ZrO 2 –SiO 2 nanocrystalline ceramics. The phase composition, microstructure, pore formation mechanism, and ion release behaviors of the ceramics were explored. The ceramics showed a hierarchical porosity , consisting of connected macropores (∼100 μm or larger) and micropores (∼1 μm). The spherical macropores were formed by a pore-forming agent method, and the irregular micropores were formed because of incomplete densification. The bioactive dopants (Ca and Sr) acted as a destabilizer of tetragonal ZrO 2 . Ca, Si, and Sr ions continuously released from the surface of the samples, providing good bioactivity for the ceramics. The porous and bioactive ceramics show great potential to be used as artificial bone scaffolds.
研究领域:
材料科学
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生物医学工程
·
骨科研究
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）