Article
Materials Science, Multidisciplinary
Sergey Grigoriev, Eugeniy Gershman, Iosif Gershman, Alexander Mironov
Summary: The study investigated the influence of Cu-Al2O3-Zn powder mixtures on the properties of coatings deposited via cold spraying. Results showed that coatings with different composition ratios displayed varied adhesion, electrical conductivity, and wear resistance. The 60Cu-40Al(2)O(3) coating exhibited superior adhesion and conductivity, while the 40Cu-50Al2O3-10Zn coating was the most wear-resistant.
Article
Materials Science, Coatings & Films
Qin Chen, Min Yu, Kai Cao, Hui Chen
Summary: The influence of different ceramic phases on the wear resistance and thermal conductivity of cold spray coatings was explored. The addition of Al2O3 or SiC improved the coating quality, and composite coatings with Al2O3 or SiC exhibited better wear resistance. The thermal conductivity of all coatings was lower than pure Cu coating, but significantly improved after annealing for composite coatings with Al2O3 or SiC.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Zhizhong Wang, Li Ma, Bin Han, Guosheng Huang, Qi Cao, Mingxian Sun
Summary: The cold spraying parameters affect the performance of FAA coating, with spray temperature having no effect on amorphous content, porosity decreasing with the increase of spray parameters, hardness slightly decreasing, and sealing necessary for corrosion resistance.
SURFACE ENGINEERING
(2021)
Review
Materials Science, Multidisciplinary
Huipeng Wang, Peng Li, Weiling Guo, Guozheng Ma, Haidou Wang
Summary: Copper-based composite coatings have been widely used in important industries due to their excellent properties. The cold spray (CS) technology, characterized by low-temperature deposition, has emerged as the most promising method for preparing Cu-based composite coatings. This paper introduces the principle and deposition mechanism of CS technology, explores the deposition mechanism of Cu-based metal/ceramic composite coatings, summarizes the effects of key CS process parameters on the coating quality, reviews the current research status of cold-sprayed Cu-based composite coatings in different fields, and elaborates on the improvement of coating performance through post-process treatments. Finally, the future development of Cu-based composite coatings and CS technology is discussed.
Article
Materials Science, Multidisciplinary
Marcin Winnicki, Wojciech Lapa, Zbigniew Znamirowski
Summary: Investigation into the field electron emission of cold-sprayed copper-silicon carbide composite coatings on a steel substrate revealed that the morphology of copper powder and the addition of an extra SiC layer significantly influenced the emission intensity. Using the Fowler-Nordheim model, the threshold electric field and coefficient of electric field amplification of the Cu/SiC + SiC coatings were found to be in the range of E-th = 20 to 24 V/mu m and beta = 340 to 410, respectively.
Article
Chemistry, Physical
Naijiang Wang, Chengxin Liu, Yangang Wang, Hao Chen, Xingrong Chu, Jun Gao
Summary: This study aims to obtain the Al-Zn composite coating with the best anti-corrosion performance by optimizing the spraying temperature, spraying distance and powder-feeding motor speed. The experimental results showed that the coating had a hardness of 67 HV, a porosity of 0.57%, and a thickness of 0.588 mm when the spraying temperature, spraying distance and powder-feeding motor speed were 500 degrees C, 27 mm and 1.5 r/min, respectively. The EIS test results demonstrated that the coating had good corrosion resistance at this parameter.
Article
Materials Science, Multidisciplinary
Hao Chen, Chengxin Liu, Xingrong Chu, Tao Zhang, Jianjun Zheng
Summary: In this study, Cu-based coatings with excellent corrosion resistance were prepared by cold spraying. The coatings showed a dense microstructure, and the presence of Al improved the corrosion resistance.
Article
Materials Science, Coatings & Films
M. Blum, E. Gyoktepeliler-Akin, A. Killinger
Summary: Investigation was conducted on the direct spraying of AlN using a supersonic suspension flame spray (HVSFS) process to enhance the thermal conductivity, and the performance of the sprayed coatings, including morphology and phase composition, was analyzed. The results showed that the coatings with axially injected pure AlN suspension had the highest AlN content, and the thermal conductivity values were positively correlated with the AlN content in the coatings.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Yu-Juan Li, Xiao-Tao Luo, Chang-Jiu Li
Summary: Utilizing acid pickling to remove the surficial oxide scale of powder particles, the study focused on improving the deposition efficiency and properties of cold-sprayed Cu deposits. Results showed that acid pickling significantly enhanced the deposition efficiency from 74% to 84% and improved the tensile properties and conductivities of Cu deposits. Acid-pickled powder yielded a tensile strength of 245 MPa, Young modulus of 85 GPa, electrical conductivity of 90%IACS, and thermal conductivity of 298 W.m(-1).K-1.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Naveen Manhar Chavan, Prita Pant, G. Sundararajan, P. Suresh Babu
Summary: It is well known that post treatments are necessary for cold sprayed coatings to achieve properties similar to their bulk counterparts, even with high pressure cold spray. In this study, high energy infrared emitters were used as a heating tool for post treating cold sprayed copper based coatings. The influence of heating power density and exposure duration on coating properties and microstructure was comprehensively explored. Pure copper coatings responded well to the mobile post treatment, showing improved microstructure and properties comparable to or better than furnace heat treatment. However, Cu-Al alloy coatings showed less favorable response to both infrared and furnace post treatments, which is discussed based on microstructural observations.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Han Hu, Lin Mao, Jinkun Xiao, Guodong Sun, Hanlin Liao, Chao Zhang
Summary: Atmospheric plasma spraying was used to deposit CT65 ceramic composite coatings on 304 stainless steel substrates. The influence of hydrogen flow rates on coating structure, hardness, and compactness was evaluated. The results showed that increasing hydrogen flow rate reduced coating wear rate and changed the wear mechanism from abrasive to adhesive.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yan-wei Wang, Xing-yu Wang, Xiao-long Wang, Yong Yang, Yu-hang Cui, Yu-duo Ma, Wen-wei Sun
Summary: MoO3-Al composite powders were used to prepare in situ composite coatings, with the optimal composition of 63 wt% MoO3. The porosity of the coatings decreased first and then increased with the increase of MoO3 content. The composite coating with 63 wt% MoO3 showed the highest microhardness and the best wear resistance among the coatings with different MoO3 contents.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Zhikai Liu, Weiqi Lian, Cansen Liu, Xiaohua Jie
Summary: In this study, Ni-Al intermetallic composite coatings reinforced with in situ reduced graphene oxide (r-GO) were successfully prepared using low-pressure cold spraying and subsequent heat treatment. The microstructure and phase of the composite coatings were characterized using X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). Results from the high-temperature wear test indicate that the in situ rGO-reinforced Ni-Al intermetallic composite coatings exhibit a 33.3% lower friction coefficient and 26% lower wear rate compared to pure Ni-Al intermetallic coatings, attributed to the generation of an easy-shearing transferred film between the coating and grinding ball.
Article
Materials Science, Multidisciplinary
Chao Han, Li Ma, Xudong Sui, Bojiang Ma, Guosheng Huang
Summary: A low energy density laser re-melting method was used to improve the performance of cold spraying FeCoCrMoBCY FAA coating on 40Cr substrate, resulting in improved abrasion resistance and reduced corrosion rate. However, it was unable to completely eliminate the penetrated diffusion passage. Further optimization is needed to enhance the anticorrosion performance of this method.
Article
Materials Science, Ceramics
Jarnail Singh, Sukhpal Singh Chatha, Hazoor Singh
Summary: The study showed that with the increase of CS content in the HA coating, the corrosion resistance of HA-CS coatings improved. Additionally, surface roughness, porosity, microhardness and crystallinity increased with the increase of CS content in HA.
CERAMICS INTERNATIONAL
(2021)