CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Nan Zhang,Qingkui Li,Kaijun Yang,Hailong Wang,Jinpeng Zhu,Zhuang Ma,Lihong Gao,Yanbo Liu,Yang Liu,Jilin He
Core-shell structured cermet powders with thermal conductivity anisotropy have been brought into focus because they have a great potential application as the horizontal thermal diffusion layer material in multilayer thermal protective coating (TPC). In this contribution, core-shell structured YSZ@Cu cermet powders were fabricated by electroless deposition (ED) of Cu on yttria-stabilised zirconia (YSZ) powder. The surface of YSZ powder was uniformly coated with a thin Cu shell of approximately 2 μm. Through X-ray photoelectron spectra (XPS) analysis, it was found that trace CuO and Cu 2 O oxides formed on the surface of Cu shell. Results of thermal spraying adaptability analysis show the flowability of core-shell structured YSZ@Cu cermet powder improved to 56.8 s/50 g, which conforms better to the basic requirements of thermal spraying material. By differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) tests, the YSZ@Cu powder had good thermal stability. In particular, between 25 and 500 °C, the anisotropy thermal conductivity rose higher than 1.8 and it remained stable at approximately 1.6 with temperature as high as 900 °C. All these features promise it a high-performance thermal conductivity anisotropy material.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Yizhe Lv,Yaoning Sun,Chunming Deng,Xiujuan Fan,Shuangjian Li,Chao Wang,Yaqi Yang,Yuhang Zhang,Chunyan He
Reliable and long-lasting self-lubricating, wear-resistant, and corrosion-resistant ceramic-based coatings are vital for combating coupling damage in marine environments. However, the lack of understanding of marine protective coatings' damage mechanisms has hindered the development of design theories. Therefore, the development of integrated coating preparation techniques and corrosion-wear evolution research are urgently needed. This study introduces carnauba wax into thermally sprayed ceramic coatings via vacuum-hot impregnation, creating a composite coating that exhibits corrosion resistance, wear resistance, and lubrication. Analyzing the electrochemical and tribological performance tests of the composite coatings under various corrosion cycles aims to investigate the protective effect of the coatings and the corrosion/friction evolution patterns. The results indicate that carnauba wax seals micro-nano defects of the coating. Simultaneously, carnauba wax within the coating defects imparts hydrophobic properties (>112°), decreasing seawater interaction with the coating surface. Over a 70-day corrosion testing period, the polarization resistance ( R p ) of the coating reached 2.42 × 10 7 Ω·cm 2 , indicating excellent corrosion resistance. A well-covered lubricating film composed of Al 2 O 3 , ZrO 2 , and carnauba wax was formed in the wear area, with carnauba wax providing a low friction coefficient (<0.2), while nano Al 2 O 3 and ZrO 2 enhance the load-bearing capacity of the lubricating film. Throughout the full corrosion cycle, the coating demonstrates stable and excellent lubricating wear resistance; the wear rate is only 8.58 × 10 −7 mm 3 ∙N −1 ∙m −1 . This research offers new protective strategies for components in marine environments while exploring long-term corrosion-wear evolution of coatings.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Yizhe Lv,Yaoning Sun,Fangxu Sun,Chunming Deng,Xiujuan Fan,Shuangjian Li,Chao Wang,Yaqi Yang,Yuhang Zhang,Chunyan He
Inspired by the mechanism of skiing, herein, a novel composite coating with excellent lubrication properties was developed by incorporating solid-liquid reversible lubricating phases into the inherent microcracks and pores of thermally sprayed ceramic coatings. The results indicate that the crystalline-amorphous heterostructure formed within the micro-nano cracks, enhancing their cohesive strength and toughness. Compared to traditional ceramic coatings, the friction coefficient of the composite coating has been reduced by 80 %, while the wear rate decreased from 2.89 × 10 −4 to 6.44 × 10 −7 mm 3 ∙N −1 ∙m −1 . Under the applied load and friction-induced heat, a thin liquid lubrication film is formed. Importantly, the lubricating phase continuously overflows from defects under the induction of frictional heat to replenish the lubricating film, ensuring long-term lubrication of the coating.
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
Metals
·
2017
·Vol. 7
·期 4
·137
·
IF 1.984
Xiaobo Wang,Taoyuan Ouyang,Xiaohua Duan,Chengzhu Ke,Xuemin Zhang,Jie Min,Aang Li,Weiyang Guo,Xudong Cheng
One type of multimodal (comprised of nanometer and sub-micrometer WC particles) and two types of conventional (comprised of nanometer and sub-micrometer WC particles, respectively) WC/Co powders were deposited on AISI 304L stainless steel substrates by using high velocity oxygen fuel spraying. The use of multimodal WC particles was indicated to have a beneficial effect on the solar absorptance (α) of the WC/Co coatings. The α of the multimodal WC coating reached 0.87, which was much higher than what can be achieved by either fine (0.82) or coarse powders (0.80) alone. By microstructural analysis, the enhancement in solar absorptance of the multimodal WC/Co coating was ascribed to the layer of distributed WC particles. During the thermal spraying, the nanostructured WC particles underwent rapid melting for the large specific surface area while the aggregated powders were heated, but not necessarily melted. The molten nano-WC would fill the available pores between the softened and heated aggregates, providing a layered distribution of WC particles for the spray-deposited coating. In this condition, the light-trapping in the multimodal coating will be enhanced due to the efficient light reflection among the multimodal WC particles, which contributes to the enhancement of solar absorptance.Keywords:solar selective absorbing coating;high velocity oxygen fuel;selective absorbing properties
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jintao Wang,Du Hong,Xin Zhong,Liping Huang,Yaran Niu,Hong Li,Xuebin Zheng,Jinliang Sun
A study of abradable sealing coatings (ASCs) compatible with ceramic matrix composites (CMCs) is reported. Three kinds of bi-layer ASCs (YSZ, Yb 2 SiO 5 , and Yb 2 Si 2 O 7 ) with CaF 2 lubricant phase were deposited by atmospheric plasma spray (APS) technology, respectively, which possessed the capability to protect CMCs from degradation and alleviate thermal expansivity mismatch. The porosity of all three coatings was less than 10%, and theYSZ-CaF 2 and Yb 2 Si 2 O 7 -CaF 2 coatings possessed similar Rockwell hardness, which were smaller than the Yb 2 SiO 5 -CaF 2 coating. However, the Yb 2 Si 2 O 7 -CaF 2 coatings displayed excellent abradability in friction and wear tests at room temperature and 900 °C. Long-term oxidation tests were conducted at 1300 °C for 100 h, and the YSZ-CaF 2 coating cracked and spalled. The structures of the Yb 2 SiO 5 -CaF 2 and Yb 2 Si 2 O 7 -CaF 2 coatings remained intact. Ca 0.15 Zr 0.85 O 1.85 solid solution and CaSiO 3 phase were formed in YSZ-CaF 2 coating, while Ca 2 Yb 8 (SiO 4 ) 6 O 2 phase was generated in Yb 2 SiO 5 -CaF 2 and Yb 2 Si 2 O 7 -CaF 2 coatings. After thermal shock with 40 cycles at 1100 °C, the whole YSZ-CaF 2 coating spalled off, while the structure of Yb 2 SiO 5 -CaF 2 and Yb 2 Si 2 O 7 -CaF 2 coatings remained integrity with good thermal shock resistance. This study might offer new insights for the further development of ASCs suitable for CMCs.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Chunyan He,Xing Hu,Shuangjian Li,Jialin He,Zhongwu Liu,Xiujuan Fan,Changguang Deng
Superhydrophobic coatings have attracted increasing attention due to their exceptional performance. Although these materials are becoming more widely employed, there are still a number of critical challenges, such as complex or costly fabrications, poor long-term stability, weak interfacial bonding between ceramics and fluoropolymers, and others, that may limit their application in large areas. This study presents the creation of a durable and versatile superhydrophobic Al 2 O 3 /Polytetrafluoroethylene (PFA) composite coating via a one-step thermal spraying technique. Results show that the formation of interdiffusion layer between Al 2 O 3 and PFA splats could be responsible for robust interfacial bonding. The composite coating retains its superhydrophobic properties after 100 cycles of wear with 1000-grit sandpaper subjected to a load of 100 g (equivalent to a friction distance of 2000 cm). With the challenges of bending damage and high-strength wear, the superhydrophobic Al 2 O 3 /PFA composite coating exhibits remarkable self-cleaning efficacy against various liquids. The robust hybrid coating features straightforward preparation, outstanding characteristics, and durability, potentially generating significant interest in the engineering application sector.
研究领域:
材料科学
·
表面工程
·
涂层技术
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Rui He,Mingxian Liu,Yan Shen,Rong Liang,Wei Liu,Changren Zhou
Here, we reported a fast, low-cost, and effective fabrication method of large-area and rough halloysite nanotubes (HNTs) coatings by thermal spraying of HNTs ethanol dispersions. A uniform HNTs coating with high transparence is achieved with tailorable surface roughness and thickness. Compared with normal cells, the tumor cells can be captured effectively with high capture yield by the HNTs coatings (expect HeLa cells), which is attributed to the enhanced topographic interactions between HNTs coating and cancer cells. HNTs coating formed from 2.5% ethanol dispersions shows the highest tumor cells capture yeild (90%), which is related to the appropriate roughness and anti-EpCAM conjugation. The capture yield of HNTs coating towards MCF-7 cells can be further improved to 93% within 2 h under dynamic shear using a peristaltic pump. The capture yield increases with the incubation time, and the flow rate with 1.25 mL/min leads to the maximum capture yield. The HNTs coatings are also effective for capture of tumor cells spiked in artificial blood samples and blood samples from patients with metastatic breast cancer. More than 90% targeted MCF-7 cells and very small amounts of white blood cells are captured by the anti-EpCAM conjugated HNTs coatings from a blood sample. HNTs are further loaded anticancer drug doxorubicin (DOX) and then thermally sprayed into coatings. The MCF-7 cells captured on DOX loaded HNTs coating display significant membrane rupture characteristic and only 3% cell viability after 16 h. The high capture efficiency of tumor cells by HNTs coating fabricated by the thermal spraying method makes them show promising applications in clinical circulating tumor cells capture for early diagnosis and monitoring of cancer patients. The high killing ability of the DOX loaded HNTs coating can also be designed as an implantable therapeutic device for preventing tumor metastasis.
研究领域:
材料科学
·
生物医学工程
·
癌症研究
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）