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 CHEMISTRY AND PHYSICS
·
2020
·
IF 3.408
Min Xue,Songbai Liu,Xin Wang,Kuo Jiang
The structural degradation resulting from the phase transformation of excrescent monoclinic form limits the long-term durability and sintering adaptability of the ZrO 2 -based ceramic components. The objective of the present study was to report on the use of the fully tetragonal nanocrystalline 3mol% yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) powders as the starting material for ZrO 2 -toughened ceramics. The influences of time-temperature sintering conditions on the fracture toughness of the 3Y-TZP ceramics were investigated. Dense 3Y-TZP ceramics (>96% of theoretical density) with no monoclinic structure can be achieved with a Hollomon-Jaffe parameter (HJP) in the range of 46 K–52 K. The fracture toughness values of the 3Y-TZP ceramics were determined to be in the range of 4.0–6.2 MP m 1/2 , and these values did not vary significantly over a wide sintering range. Phase composition and microstructure analysis results indicate that the high fracture toughness over a wider range of sintering conditions can be attributed to the cooperativity between the transformation toughening mechanism and the critical grain size effect of the transition from the tetragonal to monoclinic phase of the 3Y-TZP.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yidi Xu,Jiancheng Yu,Chuchu Ye,Zengqi Ye,Xin Zhou,Yue Huang,Ziqi Yu,Yuncang Li,Jixing Lin,Xian Tong,Cuie Wen,Jianfeng Ma,Li Zhu
The 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) ceramic has potential dental restoration applications due to its sufficient mechanical strength, high esthetic potential, and biocompatibility. Nevertheless, the conventional clinical processing of 3Y-TZP ceramic has a significant amount of material waste, high tool wear, and the possible formation of microcracks. In this study, alumina whisker (Al 2 O 3 w)-reinforced 3Y-TZP ceramic composites were prepared using the stereolithography technology followed by sintering for dental crown applications. This study aimed to address current manufacturing defects in dental ceramics by fabricating tough, strengthened zirconia ceramics using 3D printing technology. The results indicate that the grain size and distribution homogeneity of the ZrO 2 phase, mechanical properties, and hardness of the 3Y-TZP/Al 2 O 3 w specimens were better than those of the 3Y-TZP specimen, while the relative density showed a decrease with an increase in Al 2 O 3 w contents. The 3Y-TZP/7.5 % Al 2 O 3 w composite showed the best mechanical performance with a flexural strength of ∼863.0 MPa, a Vickers hardness of ∼13.2 GPa, and a fracture toughness of ∼6.6 MPa m 1/2 , which is about 13.1 %, 9.7 % and 25.1 % higher than those of 3Y-TZP specimens. The low-temperature degradation testing revealed that the addition of the reinforcement Al 2 O 3 w improved the anti-aging properties of 3Y-TZP specimens. Further, the 3Y-TZP/Al 2 O 3 w ceramic composite samples showed good cytocompatibility with a cell viability of higher than 90 % toward L929 cells and prototyping properties.
研究领域:
材料科学
·
生物医学工程
·
牙科材料学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 4
·117996
·
IF 6.2
Weichun Hu,M. Irfan Hussain,Peinan Lai,Zixuan Ye,Zhangwei Chen
Stereolithography 3D printing enables the production of intricate ceramics part with high precision and design flexibility from photosensitive ceramic slurries. Herein, we propose an approach using different dispersants (BYK-111 and KOS-110) and varying solid contents (40 vol%, 45 vol% and 50 vol%) to achieve stable flowability and improved curing layer thickness. The influence of debinding in air and argon atmospheres was investigated. Notably, debinding under an argon atmosphere not only prevented cracks but also enhanced the densification of the specimens. The optimal sintered 3Y-TZP ceramic specimen, sintered at 1500 °C, exhibited a shrinkage of 24 % in the XY-direction and 31 % along Z-direction, with a relative density of 98.09 %, weight loss of 18.50 % and open porosity of 0.24 %. Additionally, this sintered specimen demonstrated promising bending strength (784.8 MPa), and hardness of (18.06 GPa), ensuring dense printed parts with high-temperature durability. Our findings shed light on the key factors affecting the fabrication of high-density, high-performance ceramic parts with enhanced structural integrity and thermal stability.
研究领域:
材料科学
·
增材制造
·
陶瓷工程
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 17
·23302-23308
·
IF 5.6
Jingwen Feng,Hao Ju,Hengcheng Wan,Lei Miao
Because of their antibacterial and aesthetic properties, zirconia (ZrO 2 ) ceramics are gradually replacing traditional dental restoration metals and metal ceramic materials. Herein, densified 3 mol% Y 2 O 3 –stabilized tetragonal polycrystalline ZrO 2 (3Y-TZP) ceramics doped with ZnO , termed 3Y-TZP-x:Zn (x denotes the mass percentage of the ZnO functional agent), is rapidly prepared using spark plasma sintering (SPS). Results indicate that dense 3Y ceramics can be rapidly prepared via SPS at 1500 °C for 3 min, with a density of >99 % and the maximum doping content of the ZnO functional agent being 0.3 %. Scanning electron microscopy analysis shows that the 3Y ceramic is dense and the particles are uniform and small. This small particle size can enhance the diffusion of ZnO into bacterial cell membranes . 3Y-TZP-x:Zn (x = 0.1, 0.2, and 0.3) ceramics show certain antibacterial properties , with the antibacterial activity being strongest (74.55 %) at x = 0.3. The ZnO functional agent exerts antibacterial effects through a synergistic effect between (1) the contact adsorption mechanism by which reactive oxygen species are generated to inactivate the bacterial cell and (2) the dissolution mechanism by which the stability of metal cations in cells is destroyed. Therefore, SPS may be considered a promising technique for the preparation of antibacterial ceramics at lower temperatures.
研究领域:
材料科学
·
陶瓷
·
抗菌材料
·
牙科材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Mechanics in Medicine and Biology
·
2022
·
IF 0.883
ZHENHUA WANG,ZHIWEI ZHOU,YIFAN LI,WANQIONG NIU,LIJUAN REN
Purpose: To explore the improvement of its low temperature aging resistance by co-doping oral 3Y-TZP with TiO 2 and GeO 2 . Methods: After the samples of 3Y-TZP co-doped with GeO 2 and TiO 2 were prepared by mechanical ball milling, drying, and pressureless sintering, the microstructure was studied by scanning transmission electron microscope, energy spectrometer, and high angle annular dark field detector. After treatment in the autoclave, the conversion of all samples was measured by XRD. Results: After mechanical ball milling for 24 hours, the particle size of the composite powder of 3Y-TZP co-doped with GeO 2 and TiO 2 is uniform, distributed at about 50 nm, the particle shape is basically spherical, the dispersion is good, but there is a small amount of agglomeration; Tetravalent stabilizers (Ge 4 + , Ti 4 + ) can inhibit the low-temperature aging effect of zirconia materials. With the increase of germanium oxide doping, the hydrothermal degradation resistance of zirconia can be improved. GeO 2 doped 3Y-TZP has better low temperature aging resistance than TiO 2 doped 3Y-TZP. With the increase of dopant content, the degree of grain boundary segregation increases, but even if the doping amount of Ge 4 + is small, the degree of grain boundary segregation can be comparable to that of Ti 4 + with a large doping amount. Conclusion: In this paper, the composite powder of 3Y-TZP co-doped with GeO 2 and TiO 2 with uniform particle size and good dispersion was prepared by mechanical ball milling. The preparation process is simple, the energy consumption is low, and the cumbersome processes of the co-precipitation method and liquid-phase method are avoided. On the other hand, adding GeO 2 and TiO 2 can enhance the low-temperature aging resistance of 3Y-TZP ceramics. GeO 2 is superior to TiO 2 in low-temperature degradation resistance, which can be used as the first choice. This study contributes to the research on doping cations of dental zirconia and provides a reference for dentists to choose a reasonable zirconia material.
✓ 已验证
DOI
高影响因子
International Journal of Smart and Nano Materials
·
2023
·
IF 3.9
Rongfang Zou,Yang Huang,Lu Feng,Yanru Chen,Bin Deng
In the humid oral environment, 3Y-TZP ceramics always suffer from low-temperature degradation (LTD) for a long time, which results in the degradation of mechanical properties and catastrophic failure. The low-temperature degradation (LTD) and mechanical properties of low-cost tetravalent (Ge4+, Ti4+) element-doped 3Y-TZP were investigated by analysing grain boundary segregation in samples with deferent contents. The results show that GeO2 is superior to TiO2 in limiting LTD but results in lower flexural strength and fracture toughness when the content is ≥1.5 mol%. This dilemma can be improved by adding only 0.1%-0.5 wt% Al2O3, and the flexural strength and fracture toughness of 0.25 wt% Al2O3 zirconia are then increased to 898 MPa and 4.68 MPa·m1/2 compared with 1Ge-3Y, respectively. This work is expected to provide an effective reference for the development and application of budget dental materials.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）