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
✓ 已验证
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
·
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
·
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
·
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
·
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
·
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
·
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
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
·
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
·
生物医学工程
·
骨科研究
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Mechanical Behavior of Biomedical Materials
·
2023
·
IF 3.9
Zhuoqun Han,Shihao Liu,Kun Qiu,Jia Liu,Rongfang Zou,Yingying Wang,Jie Zhao,Futian Liu,Yang Wang,Ling Li
Digital light processing (DLP) is considered as one of the most promising additive manufacturing technologies to process ceramics. However, the potential defects produced in the debinding and sintering process extremely restrict ceramic application . In this work, a plasticizer which effectively inhibits defects of the green body in debinding process was investigated. The effects of plasticizer (Polyethylene glycol 200) on the rheological behavior and curing property of the slurry were discussed. In addition, the debinding process and the mechanical of zirconia parts with different PEG200 contents were studied. Adding 20 vol% PEG200 could efficiently suppress the defects in debinding process, and the flexural strength increased from 302 ± 15 to 1210 ± 25 MPa of the ZrO 2 ceramic sintered at 1600 °C. The superior biocompatibility and mechanical property reveal that the DLP zirconia has a promising application prospect of biology dental ceramic prostheses.
研究领域:
材料科学
·
牙科医学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 1
·1-10
·
IF 1.067
Wei Zhili,Wei Li
Zirconia ceramics (ZiC) has become a biomaterial with good clinical application prospects due to its good biocompatibility, stability, and excellent mechanical properties. In this study, bioactive glass (BioS) was undertaken as the modifier, and the ZiC precursor solution was penetrated
on the surface of the ZiC body or the ZiC particles were coated with the BioS precursor solution, so as to obtain the ZiC with biological activity by introducing the BioS phase. While the material was characterized, its mechanical properties and biological activity were analyzed by simulating
the mineralization of the body fluid, including the cell adhesion, proliferation, and differentiation of the material. The ZiC was applied as an implant for restoration of patients with teeth loss caused by periodontal disease. In the test, after surface infiltration of BioS sol or coating
of ZiC particles, a very thin BioS phase can be formed on the surface of ZiC after high temperature sintering. The in vitro mineralization test showed that the activation of the grain boundary promoted the deposition of calcium and phosphorus layers on the surface of the sample. The
mechanical test revealed that the relative density, flexural strength, and fracture toughness of the material decreased with the infiltration and coating of BioS. However, under proper preparation conditions, the modified ZiC still showed good mechanical properties and can promote the spreading,
adhesion, and differentiation of mouse bone marrow mesenchymal stem cells (mBMSCs). Clinical trials proved that after the modified ZiC implant material was implanted in patients with teeth loss, the structure was not loose or broken, and the intraoral prosthesis could function normally. After
treatment, the level of IL-1β in the gingival crevicular fluid of the patient decreased obviously (P <0.05). In addition, the probing depth (PD), clinical attachment loss (CAL), and other indicators decreased greatly (P <0.05).
研究领域:
材料科学
·
口腔医学
·
生物医学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Wei Chu,Jie Zhao,Xuzhao Ma,Fei Wang,Xiaoli Zhang,Yongcui Zhang,Zhuoqun Han,Lunan Bi,Hao Wang,Baosen Zhai,Qingxuan Zhou,Ling Li
Zirconia ceramics are renowned for their exceptional thermal stability, corrosion resistance and wear resistance, making them a key material in the fields of aerospace and military defense. This study utilized finite element simulation to design and select a lattice model with the low thermal conductivity, and its mechanical properties were experimentally verified. The results indicated that the bending strength of the lattice structure could reach 433 MPa and the heat transfer temperature at the tail was significantly reduced with a cell size of 3 mm square and a wire diameter of 1 mm. Compared to traditional solid structures, the fill rate was reduced by 25.90 %. Therefore, the lattice structure exhibits characteristics of high strength, light weight and low thermal conductivity. Furthermore, lightweight and high-heat-resistance zirconia ceramic lattice screws were successfully fabricated via using photocuring 3D printing technology, achieving the transition from theoretical simulation to component application. The research in this work provides an effective strategy for the fabrication of ceramic lattice screws with lightweight and high-heat-resistance performances and exhibit the potential application in aerospace and military defense fields.
研究领域:
材料科学
·
航空航天
·
国防科技
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yansong Liu,Yongsheng Liu,Wentan She,Wenbo Li,Yejie Cao,Jing Wang
In this work, digital light processing (DLP) – common 3D-printed technology – was used to shape yttria-stabilized zirconia (YSZ) ceramic green bodies. Influences of sintering temperature on thermal conductivity of YSZ ceramics were studied systematically. Results showed that thermal conductivity of ceramics increased from 1.89 W/(m·K) to 2.99 W/(m·K) with increasing sintering temperature from 1200 °C to 1600 °C. Porosity of YSZ ceramics decreased from 15.00% to 1.59%, and grain size increased from 0.13±0.03 μm to 0.70±0.20 μm. At lower sintering temperature from 1200 °C to 1400 °C, excessive pores exerted an impact on thermal conductivity due to phonon scattering processes. With further increase in temperature to 1600 °C, the amount of grain boundaries controlled by grain size was main factor affecting thermal conductivity of ceramics. In particular, fewer grain boundaries reduced phonon scattering, resulting in the increase in thermal conductivity. Therefore, sintering temperature is key parameter influencing thermal conductivity of YSZ ceramics through porosity, grain size and grain boundary at different stages.
研究领域:
材料科学
·
热物理学
✓ 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）