Investigation of the Splat Deposition Behavior onto a Composite Coating in Cold Spray

The splat test is usually generated by low feed rate cold spraying of particles onto an as-polished substrate and it can be considered as a monolayer coating deposition. In this study, in order to investigate cold spray deposition mechanisms, Fe splats were sprayed onto the cold-sprayed single component 316L, Fe, and a composite 90Fe coatings. Results showed that although there is only 3.6 vol.% of 316L in the composite 90Fe coating, Fe splats exhibit a much better deposition behavior onto the 90Fe as compared with the single component Fe coating. To explain this observation, Fe splat samples were characterized using the scanning electron microscope (SEM), optical profilometry, splat adhesion tests, and splat nanoindentation. Finally, a preliminary explanation towards the Fe splat deposition behavior onto the composite coating was drawn.

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Fabrication and microstrain evolution of Al-TiB2 composite coating by cold spray deposition

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420717690559 ◽

2017 ◽

Vol 233 (6) ◽

pp. 1044-1052 ◽

Cited By ~ 1

Author(s):

H Chen ◽

Z Pala ◽

T Hussain ◽

DG McCartney

Keyword(s):

Composite Coating ◽

Cold Spray ◽

Spray Deposition ◽

Composite Coatings ◽

Cold Spraying ◽

X Ray Diffraction ◽

Composite Powders ◽

X Ray ◽

Micro Cracks ◽

Powder Particles

This paper investigates the microstructure evolution of Al-TiB2 coatings prepared by cold spraying. In situ Al-TiB2 composite powders containing uniformly distributed titanium diboride (TiB2) particles with a size range of 5–100 nm in the Al matrix and Al/Al-TiB2 blended powders were used as the cold spray feedstock for coating fabrication on aluminium alloy substrates. The microstructures of the feedstock powders and as-deposited coatings were characterised using scanning electron microscopy with energy dispersive X-ray analysis and X-ray diffraction. Al/Al-TiB2 blended powder coatings, compromising closely packed powder particles, were sprayed to an approximate thickness of 500 µm. Al-TiB2 composite coatings (approximately 50 µm thick) were obtained retaining the microstructure of the composite powders being sprayed and no evidence of detrimental phase transformation was found. However, micro-cracks were found to exist in the Al-TiB2 coating due to the hardly deformable powder particles. Little or no microstrain was revealed in the as-sprayed Al-TiB2 coating, indicating that annealing may have occurred due to the localised adiabatic heating during the spraying process. It is demonstrated that it is possible to fabricate the Al-TiB2 composite coating by cold spray deposition but further improvements to eliminate coating cracking are required.

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Effect of the Neodymium Content on Mechanical Properties of the Electro-Brush Plated Nano-Al2O3/Ni Composite Coating

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.525-526.277 ◽

2012 ◽

Vol 525-526 ◽

pp. 277-280

Author(s):

Guo Jin ◽

Xiu Fang Cui ◽

Er Bao Liu ◽

Qing Fen Li

Keyword(s):

Mechanical Properties ◽

Rare Earth ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Composite Coating ◽

Nanoindentation Test ◽

X Ray Diffraction ◽

X Ray ◽

Small Cracks ◽

Scanning Electron

The effect of the neodymium content on mechanical properties of the electro-brush plated nanoAl2O3/Ni composite coating was investigated in this paper. The microstructure and phase structure were studied with scanning electron microscope (SEM) and X-ray diffraction (XRD). The hardness and abrasion properties of several coatings with different neodymium content were studied by nanoindentation test and friction / wear experiment. Results show that the coatings are much finer and more compact when the neodymium was added, and the hardness and abrasion property of the coatings with neodymium were improved obviously. Besides, the small cracks conduced by the upgrowth stress in the coatings were ameliorated when the rare earth neodymium was added. The improvement mechanism was further discussed.

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PHASE CONSTITUENTS AND MICROSTRUCTURE OF Ti3Al/Fe3Al + TiN/TiB2 COMPOSITE COATING ON TITANIUM ALLOY

Surface Review and Letters ◽

10.1142/s0218625x11014527 ◽

2011 ◽

Vol 18 (03n04) ◽

pp. 103-108 ◽

Cited By ~ 12

Author(s):

JIANING LI ◽

CHUANZHONG CHEN ◽

CUIFANG ZHANG

Keyword(s):

Wear Resistance ◽

Titanium Alloy ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Composite Coating ◽

Laser Cladding ◽

X Ray Diffraction ◽

X Ray ◽

Laser Cladding Process ◽

Scanning Electron

Laser cladding of the Fe3Al + B4C/TiN + Al2O3 pre-placed powders on the Ti-6Al-4V alloy can form the Ti3Al/Fe3Al + TiN/TiB2 composite coating, which improved the wear resistance of the Ti-6Al-4V alloy surface. In this study, the Ti3Al/Fe3Al + TiN/TiB2 composite coating has been researched by means of X-ray diffraction and scanning electron microscope. It was found that during the laser cladding process, Al2O3 can react with TiB2 , leading to the formations of Ti3Al and B . This principle can be used to improve the Fe3Al + B4C/TiN laser-cladded coating on the Ti-6Al-4V alloy. Furthermore, during the cladding process, C consumed the oxygen in Fe3Al + B4C /TiN + Al2O3 molten pool, which retarded the productions of the redundant metal oxides.

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Properties of Pulse Plating Ni-SiC Nano-Composite Coating

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.228 ◽

2011 ◽

Vol 291-294 ◽

pp. 228-232

Author(s):

Ji Qun Zhang ◽

Hui Ming Jin ◽

Ji Cheng Gao ◽

Jun Shi ◽

Lu Li

Keyword(s):

Grain Size ◽

Electron Microscope ◽

Composite Coating ◽

Nickel Coating ◽

Pure Nickel ◽

Nano Composite ◽

Composite Plating ◽

Transmission Electron ◽

Nano Composite Coating ◽

Scanning Electron

A Ni-SiC nano-composite plating coating was prepared by using composite plating technology adding nano-SiC in the bath.Then the surface morphology was examined by scanning electron microscope (SEM), the transmission electron microscope (TEM) was used to study the grain size,the porosity, corrode-resistant, combines intensity and wearability of the composite plating coating were also tested and contrasted the result with the pure nickel coating. The results shows the surface of Ni-SiC composite coating are more uniform and compact for the adding of nano-Sic refined the grain, the wear resistance,microhardness and corrosion resistance of the composite coating are also significantly improved.

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Influence of Powder Type and Substrate Hardness on the Deposition Behavior of WC-17Co Particle in Cold Spraying

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.314-316.176 ◽

2011 ◽

Vol 314-316 ◽

pp. 176-180

Author(s):

Hong Tao Wang ◽

Gang Chang Ji ◽

Xiao Chen ◽

Qing Yu Chen ◽

Xiao Bo Bai ◽

...

Keyword(s):

Cross Sections ◽

Particle Surface ◽

Cold Spraying ◽

Particle Type ◽

Soft Substrate ◽

Deposition Behavior ◽

Powder Type ◽

Substrate Hardness ◽

Spraying Process ◽

Scanning Electron

In this study, the influence of particle type and substrate hardness on the deposition behavior of single WC-17Co particle during the cold spraying process was investigated. The morphology of the deposited particles was examined by scanning electron microscopy (SEM) from the particle surface and cross-sections. It was found that with increasing substrate hardness, the deposition behavior of WC-17Co particles transformed from completely embedding into soft substrate to partially flattening and even rebounding from the hard substrate. In the comparison between different powder types, spherical nanostructured WC-17Co particles experienced the more intensive deformation due to the smaller WC size.

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Electroless Deposition of Ni-P/SiO2 Composite Coating

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201664051459 ◽

2016 ◽

Vol 64 (5) ◽

pp. 1459-1464 ◽

Cited By ~ 1

Author(s):

Martin Buchtík ◽

Petr Kosár ◽

Jaromír Wasserbauer ◽

Martin Zmrzlý

Keyword(s):

Electron Microscope ◽

Composite Coating ◽

Electroless Deposition ◽

Nickel Coating ◽

Steel Substrate ◽

Deposition Process ◽

Second Step ◽

Nucleation Center ◽

Eds Analysis ◽

Scanning Electron

Electroless deposit Ni–P/SiO2 composite coating was performed on the steel substrate, DIN EN 10130. The preparation of nickel coating included two main steps. In the first step, the fraction of SiO2 particles sized the tens of nanometres was obtained by sedimentation. In the second step, the composite coating was plated on the steel substrate. The actual deposition process contains the deposition of plain Ni-P interlayer which served as the nucleation center for the deposition of Ni-P/SiO2 composite coating with co-deposited SiO2 particles. The morphology of deposited composite coating was studied by scanning electron microscope (SEM). Amount of individual elements in deposited coatings was determinated by EDS analysis. The microhardness of deposited composite coating was subsequently compared with microhardness value of the plain Ni–P coating.

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Wear Resistance of a Large Thick Fe Based Amorphous Composite Coating Deposited by Laser Cladding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.913.390 ◽

2018 ◽

Vol 913 ◽

pp. 390-395

Author(s):

Yong Tian Wang ◽

Jia Wei Mo ◽

Lu Lu Tao

Keyword(s):

Wear Resistance ◽

Phase Composition ◽

Electron Microscope ◽

Composite Coating ◽

Laser Cladding ◽

Steel Substrate ◽

X Ray Diffraction ◽

X Ray ◽

Hardness Tester ◽

Scanning Electron

A large thick Fe based amorphous composite coating was deposited on the carbon steel substrate by laser cladding method. The phase composition and microstructure are characterized using X-ray diffraction and scanning electron microscope, respectively. The results demonstrate that the large thick laser cladding coating has a typical layered structure mainly consisting of amorphous and nanocrystal phases. The wear resistance and microhardness property are tested by the Vickers hardness tester and MLS-225 type wet sand rubber wheel abrasion tester. The results show that the large thick laser cladding coating has excellent wear resistance and hardness.

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Cold Spray Process to Mitigate Potential Stress-Corrosion Cracking in Used Nuclear Fuel Storage Canisters

10.31399/asm.cp.itsc2021p0623 ◽

2021 ◽

Author(s):

Nicholas Pocquette ◽

Hwasung Yeom ◽

Hemant Agiwal ◽

Frank Pfefferkorn ◽

Kumar Sridharan ◽

...

Keyword(s):

Stainless Steel ◽

Stress Corrosion ◽

Nuclear Fuel ◽

Cold Spray ◽

Stress Corrosion Cracking ◽

Spent Nuclear Fuel ◽

Spray Deposition ◽

Cold Spraying ◽

Corrosion Cracking ◽

Spray Coatings

Abstract Cold spray deposition is being investigated for mitigation of chloride-induced stress corrosion cracking (CISCC) in dry cask storage systems (DCSS) for spent nuclear fuel. Welded regions of austenitic stainless-steel canisters in DCSS are under tensile stress and susceptible to environmental chloride corrosion, which can potentially lead to the formation of CISCC. The low thermal input and high throughput nature of cold spraying make it a viable repair and mitigation option for managing potential CISCC. Cold spray coatings are under compressive stress and act as a barrier in Cl-rich environments. Characterization data including microstructure, hardness, and corrosion resistance are presented for cold spray coatings on stainless steel substrates.

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