CERAMICS INTERNATIONAL
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2023
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IF 5.2
Dongbo Zhang,Ning Wang,Ruiqing Song,Menglong Zhou,Xinyue Tang,Yongsheng Zhang
In this study, (La 0.2 Gd 0.2 Y 0.2 Sm 0.2 Ce 0.2 ) 2 Zr 2 O 7 ((LGYSC)ZO)), as a new type of thermal barrier coating material, was designed and synthesized. The lattice structure, microstructure, optical, thermophysical, and mechanical properties of the (LGYSC)ZO high-entropy oxide were also investigated. The results showed that a phase-pure pyrochlore-structure (LGYSC)ZO high-entropy oxide, which has a uniform elemental distribution at high temperatures, was successfully synthesized. In addition, the UV–Vis diffuse reflectance spectra results show that (LGYSC)ZO high-entropy oxide has direct and indirect bandgap widths of 3.10eν and 2.51eν, respectively. Infrared (IR) spectra of (LGYSC)ZO high-entropy oxide patterns were measured. The infrared spectra results show that the (LGYSC)ZO high-entropy oxide has better high temperature thermal radiation shielding performance than yttria stabilized zirconia(YSZ). According to the measured result by laser flash method, the thermal conductivity of (LGYSC)ZO high-entropy oxide is at range from 1.18 W m −1 K −1 to 1.37 W m −1 K −1 in the temperature regime from 200 °C to 1000 °C after porosity correction. The coefficient of thermal expansion (CTE) of (LGYSC)ZO high-entropy oxides is at range from about 7.79 × 10 −6 k −1 to 11.1 × 10 −6 k −1 corresponding temperature from 90 °C to 1000 °C. The mechanical properties of (LGYSC)ZO high-entropy oxides were also investigated, and the hardness and fracture toughness of (LGYSC)ZO high-entropy oxide were 6.61 GPa and 1.27 MPa m 1/2 , respectively. Therefore, the results indicate that (LGYSC)ZO has excellent properties as a promising thermal barrier coating material.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Xudong Wang,Ke Chen,Ziqian Li,Haoming Ding,Yujie Song,Shiyu Du,Zhifang Chai,Hui Gu,Qing Huang
Herein, a series of chalcogen-containing MAX phases, Hf 2 (Se x S 1−x )C, were successfully synthesized, whose lattice parameter change follows the Vegard’s law. The average coefficient of thermal expansion (CTE) can be continuously tuned from 7.59 μK −1 to 9.93 μK −1 when the occupancy rate x of Se changes from 0 to 1. The substitution of Se for S effectively soften the crystal structures that is reflected by long average M-A bond in Se-alloying Hf 2 (Se x S 1−x )C. However, the CTEs along a and c axes in all Hf 2 (Se x S 1−x )C MAX phases are almost same which may be find application in thermal barrier coating (TBC) that isotropic volume change is highly demanding.
研究领域:
材料科学
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热物理学
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固体化学
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Tao Guo,Jiayuan Chen,Lan Luo,Qiangwang Geng,Linlin Wang,Fenghua Zhang,Narisu Hu,Yanju Liu,Jinsong Leng
Shape memory polymer (SMP) microspheres possess controllable physicochemical properties, internal cavities capable of loading drugs or nanoparticles, and inherent intelligence, making them suitable for various biomedical applications. In this research, we utilized tri-n-butyl citrate (TBC) to lower the glass transition temperature of shape memory polylactic acid (PLA) to approximate oral temperature. Following this, we introduced oleic acid-modified Fe 3 O 4 nanoparticles to confer magnetism to the material. Subsequently, SMP microspheres with a core–shell structure encapsulating Fe 3 O 4 particles were prepared using the emulsion-solvent evaporation method, and we carefully controlled their particle size and morphology to match the diameter of dentinal tubules. Our investigation focused on applying these magnetically guided microspheres, which exhibited excellent shape memory performance, for sealing dentinal tubules. These microspheres displayed the ability to move directionally under the influence of a magnetic field. As a result, they could be attracted into the interior of dentinal tubules in their temporary shape and then revert to their initial shape upon heating at 40 °C, thereby achieving the closure of dentinal tubules effectively. The microsphere entry rate during the tubule closure process was found to be 93.33 ± 2.82 %, with a corresponding sealing rate of 85.41 ± 7.11 %. The successful demonstration of magnetic-guided movement and the utilization of the shape memory function for dentinal tubule sealing significantly expand the potential applications of SMP microspheres in the field of biomedical science.
研究领域:
材料科学
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口腔医学
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生物医学工程
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DOI
高影响因子
MODERN PHYSICS LETTERS B
·
2025
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IF 2.2
Hao Xu,Lin Chen,Jiang Tian,Baihui Li,Luyang Zhang,Jiankun Wang,Jing Feng
High-entropy ceramics (HECs) are widely studied to boost the properties of various materials, based on the high-entropy effects and high disorders in ionic radius and atomic weights. To further optimize the properties of RETaO 4 (RE is rare-earth) as thermal barrier coatings (TBCs), a diatomic site high-entropy engineering is applied to increase their disorders, subsequently boosting their thermophysical properties. Four RETaO 4 HECs are designed and synthesized in this work, including (Gd 1 ∕ 5 Dy 1 ∕ 5 Ho 1 ∕ 5 Er 1 ∕ 5 Y 1 ∕ 5 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (5HECs-1), (Gd 1 ∕ 5 Dy 1 ∕ 5 Ho 1 ∕ 5 Er 1 ∕ 5 Yb 1 ∕ 5 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (5HECs-2), (Gd 1 ∕ 6 Dy 1 ∕ 6 Ho 1 ∕ 6 Er 1 ∕ 6 Yb 1 ∕ 6 Y 1 ∕ 6 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (6HECs-1), and (Gd 1 ∕ 6 Dy 1 ∕ 6 Ho 1 ∕ 6 Er 1 ∕ 6 Yb 1 ∕ 6 Lu 1 ∕ 6 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (6HECs-2). It shows that the thermal conductivity (1.41–1.59 W ⋅ m − 1 ⋅ K − 1 , 9 0 0 ∘ C) is reduced, while thermal expansion coefficients are improved ( TECs = 1 0 . 4 4 – 1 0 . 8 7 × 1 0 − 6 K − 1 at 1 4 0 0 ∘ C), which are better than their single-RE ceramics. Furthermore, Young’s modulus is proportional to their A -site ionic radius, and RETaO 4 HECs have higher modulus than single-RE RETaO 4 and RENbO 4 ceramics. Accordingly, the diatomic site high-entropy engineering is effective in boosting the thermophysical properties of RETaO 4 , and this strategy can be tried in various oxide ceramics.
研究领域:
材料科学
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热物理工程
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DOI
高影响因子
Advanced Optical Materials
·
2024
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IF 8
Qingyuan Zhao,Shuqi Wang,Guoliang Chen,Yifan Sun,Yongchun Zou,Enyu Xie,Zijian Peng,Junteng Yao,Ouyang Jiahu,Yaming Wang,Dechang Jia,Yu Zhou
As the thrust-weight ratios of aero-engines increase, the severe thermal radiation emitted by high-temperature gases (≥1800 K) poses a significant challenge for thermal barrier coating (TBC) materials. Traditional TBC materials, despite their reliable thermal insulation properties, are nearly transparent to infrared radiation, which leads to direct radiative heating of the metallic substrate, consequently reducing its service life. In response, a La 2 Hf 2 O 7 -based ceramic doped with a NiFe 2 O 4 second phase is developed to prevent the penetration of thermal radiation and achieve exceptional thermal radiation shielding properties. The experimental results exhibit that 85%La 2 Hf 2 O 7 /15%NiFe 2 O 4 possesses high absorptivity exceeding 0.85 across a broad wavelength range (0.2-14 µm), and ultra-low transmittance of 0.001 in the range of 0.4-2.5 µm. It attributes to the presence of multi-valent transition elements (Ni + /Ni 2+ and Fe 2+ /Fe 3+ ) in NiFe 2 O 4 , which significantly reduce the band gap width, enhancing photon absorption, scattering, and electron transition probability following infrared radiation absorption. These multifaceted contributions minimize radiative thermal conductivity to 1.55 W m −1 K −1 , effectively shielding the radiative heat transfer. These advantages make this high-temperature thermal shielding strategy highly competitive for the next generation of TBC materials development and application.
研究领域:
材料科学
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航空航天工程
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热力学
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DOI
高影响因子
DYES AND PIGMENTS
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2018
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IF 3.767
Xian-Fu Zhang,Chang Liu,Luozhen Zhang,Jianchang Wu,Baomin Xu
An easily prepared, cost-effective and solution processable tetraphenoxy substituted phosphorous triazatetrabenzo corrole (P V TBC) was synthesized and tested as the hole transporting material (HTM) for MAPbI 3 perovskite solar cells (PSC). This phthalocyanine analogue HTM works efficiently in the absence of any dopant or additive for the device composed of FTO/c-TiO 2 /m-TiO 2 /MAPbI 3 /HTM/Au. The optimized undoped mesoscopic solar cell device based on the P V TBC compound exhibited a good power conversion efficiency (PCE) of 16.1% (measured at 100 mW cm 2 illumination, AM 1.5G), together with a good long-term stability under ambient conditions, in contrast to the PCE of 11.2% for Spiro-OMeTAD under the same condition. This result paves the way for further developing TBC as a new type of low cost HTMs.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
ACS Applied Polymer Materials
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2025
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IF 4.7
Yanjian Huang,Yufeng Mao,Hongfa Li,Enyu Wang,Huaming Mai,Wenjie Zhang,Jieming Wen,Hui You,Yu Long,Wang Guo,Bin Liu,Shan Wang
Shape memory polymers (SMPs) can transform between initial and programmed shapes under certain stimuli and have promising potential in developing shape-adaptative bone scaffolds to treat irregular bone defects in minimally invasive implantation. Polylactic acid (PLA) is a degradable, biocompatible polymer that has thermal-responsive shape memory properties; however, its high transition temperature (approximately 50–60 °C) limits clinical applicability. This study proposes to develop a shape memory PLA based composite bone scaffold that can be gently thermally driven under a moderate temperature near the body by adding tributyl citrate (TBC) and fabricated via FDM 3D printing. The 3D-printed PLA/TBC composite scaffolds showed ordered porous structures with an orthogonal periodic interconnection. The mechanical test showed that TBC significantly increased the toughness of the scaffolds while it decreased its strength and modulus. The thermal physical property test showed that the glass transition temperature was successfully reduced from 54.9 °C (pure PLA) to 40.2 °C (10% TBC), approaching body temperature through TBC’s plasticization mechanism where low-MW ester molecules increased PLA chain mobility, thereby enhancing their flexibility. The shape memory test showed the shape fixation rate of the PLA/TBC scaffold achieved 97.2% with 10% TBC, and it can transform from programmed shape to initial shape in 30 s with a shape recovery rate of 92.8% under a gentle thermal stimulation at 45 °C. Then, proof of concept of this scaffold for minimally invasive implantation of the irregular bone defect model was presented. Besides, other tests showed that the hydrophilicity and degradation performance of the scaffolds were improved with TBC. Meanwhile, TBC also promoted the biomineralization and cellular response of the scaffold. This study provides an insight for developing shape- and temperature-adaptive bone scaffolds for minimally invasive repair of irregular bone defects.
研究领域:
生物材料学
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医学工程
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组织工程
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DOI
高影响因子
Surfaces and Interfaces
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2026
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IF 6
Chenyang Jing,Da Bi,Hao Yan,Yangyang Pan,Donald B. Dingwell,Wenjia Song
Airborne particles such as sand, dust, and volcanic ash pose a severe threat to the reliability of thermal barrier coatings (TBCs) in jet engines. Upon ingestion into engines, these silicate-rich particles melt and form deposits that undergo complex spreading and adhesion dynamics on coating surfaces, ultimately leading to coating degradation. To simplify the reproducibility and comparability of experimental studies synthetic calcium–magnesium–alumino–silicate (CMAS) particles are commonly employed as simulants. Here, high-temperature deposition experiments have revealed that partially molten droplets (containing solid inclusions), exhibit heterogeneous spreading morphologies beyond classical viscous flow. A compound droplet model integrating heat transfer and spreading dynamics has been developed to describe quantitatively the deposition behavior of such partially molten particles. A physics-informed machine learning model, trained on 105 experimental cases was developed and has demonstrated superior predictive performance, with support vector regression achieving the highest accuracy (R 2 ≈ 0.71, RMSE ≈ 0.13). This combined experimental–computational strategy establishes a robust predictive paradigm linking natural threats (sand, dust, volcanic ash) with CMAS simulants, providing mechanistic insights into and mitigation strategies for CMAS-related degradation to enhance the operational reliability of aeroengines.
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DOI
高影响因子
TALANTA
·
2021
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IF 6.057
Yi Tong,Cheng Guo,Zhengzheng Liu,Keqiang Shi,Haiyan Zhang,Yaqin Liu,Guanlv Wu,Hongru Feng,Yuanjiang Pan
Tris(2,3-dibromopropyl) isocyanurate (TBC) is one of the novel brominated flame retardants that has been widely used in consumer goods. Humans may be exposed to TBC daily. Studies showed that TBC can induce significant toxicity. However, there is currently no report on its in situ localization in organs. In this study, we aimed to develop a reliable and reproductive method to determine the in situ localization of TBC in mouse organs by matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS). As commercially available matrices were not able to detect TBC in tissue section, we then developed a novel MALDI-IMS method based on 1,5-diaminonaphthalene hydrochloride and silver trifluoromethanesulfonate (NDA/AgOTf) as the matrix for the in situ localization of TBC. AgOTf used as the auxiliary matrix in the negative-ion mode showed an excellent MS signal of TBC. The detection limit of [2AgOTf + Br] - was at the μg/mL level. The developed MALDI-IMS method was successfully employed to obtain the TBC spatial distribution in the mouse organs collected from mice exposed to 160 mg/kg/day of TBC for 30 days. High-pressure liquid chromatography-tandem mass spectroscopy (HPLC-MS/MS) was also used to evaluate the accumulation of TBC in liver, kidney, heart, and brain. The combination of MALDI-IMS and HPLC-MS/MS showed that TBC can accumulate in mice organs and it is mainly distributed in the renal parenchyma. In summary, an innovative method was developed for the analysis of TBC spatial distribution by MALDI-IMS using a novel NDA/AgOTf matrix, extending the application of MALDI-IMS in environmental pollutants .
研究领域:
分析化学
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环境科学
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毒理学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）