Degradation of the Layer Applied by Cold Kinetic Deposition

2021 ◽  
Vol 105 (1) ◽  
pp. 339-354
Author(s):  
Tomáš Binar ◽  
Jana Zimáková ◽  
Michal Šustr ◽  
Lukáš Řehořek ◽  
Maros Samel ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Cold Spray ◽  
Copper Coating ◽  
Aluminum Substrate ◽  
Metallographic Analysis ◽  
Corrosive Environment ◽  
Corrosion Tests

During the described experiment, a sample with a copper coating was formed on an aluminum substrate by cold spray. Subsequently, this sample was split for corrosion tests, where the split samples were exposed to a corrosive environment for different exposure times. The extent of corrosion degradation of the samples was evaluated by acoustic emission and metallographic analysis for corrosion-loaded samples for 100, 200 and 300 hours.

The Failure of Carbon Fiber Reinforced Composite Analyzed by Acoustic Emission

2020 ◽  
Vol 405 ◽  
pp. 205-211
Author(s):  
Vladimír Mára ◽  
Jan Krčil ◽  
Lenka Michalcová ◽  
Elena Čižmárová
Keyword(s):  
Acoustic Emission ◽  
Carbon Fiber ◽  
Mechanical Test ◽  
Metallographic Analysis ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Damage And Failure ◽  
Reinforced Composite ◽  
Carbon Fiber Reinforced ◽  
Damage Processes

This paper focus on evaluation of behavior, damage and failure processes occurring during the loading cycles in the carbon fiber reinforced composite by acoustic emission method. Since acoustic emission is physical phenomenon that detects the released energy in form of waves spreading through the material due to stimulation of material by external or internal stress, it is possible to evaluate complex damage and failure processes. For that purpose, the standard and open holes tensile testing specimens with different number of plies were manufactured. Selected acoustic emission parameters were correlated with data obtained from mechanical test. Linear localization method together with signal analysis using Fast Fourier transform algorithm were used as another tool for detection and evaluation of spreading damage processes inside the composite during the load. Basic damage types inside the composite material were identified by metallographic analysis using light microscopy. More complex damage processes were observed on the fracture surface using stereomicroscopy and scanning electron microscopy.

Analysis of cold spray‐coated boiler‐tube material in a chlorine‐based corrosive environment at 900° C

2019 ◽  
Vol 71 (2) ◽  
pp. 232-241 ◽  
Author(s):  
Harminder Singh ◽  
Sukhminderbir Singh Kalsi ◽  
Tejinder Singh Sidhu
Keyword(s):  
Cold Spray ◽  
Corrosive Environment ◽  
Boiler Tube ◽  
Tube Material

J0404-1-1 Improvement of Copper Coating Adhesion Strength by Slipping Particle Impact in Cold Spray

2009 ◽  
Vol 2009.6 (0) ◽  
pp. 345-346
Author(s):  
Koichi TAKADA ◽  
Kazuhiko SAKAKI ◽  
Koichiro NAGATA ◽  
Daiki YUTOH ◽  
Yasuo SHIMIZU
Keyword(s):  
Adhesion Strength ◽  
Cold Spray ◽  
Copper Coating ◽  
Particle Impact ◽  
Coating Adhesion

Characteristic of Cu-Based Catalytic Coating for Methanol Steam Reforming Prepared by Cold Spray

2010 ◽  
Vol 156-157 ◽  
pp. 68-73 ◽  
Author(s):  
Feng Wang ◽  
Jing Zhou ◽  
Zi Long An ◽  
Xin Jing Zhou
Keyword(s):  
Cold Spray ◽  
Steam Reforming ◽  
Fixed Bed ◽  
Copper Coating ◽  
Methanol Steam Reforming ◽  
Reaction Products ◽  
Al2o3 Coating ◽  
Transfer Resistance ◽  
Catalytic Coating ◽  
Al2o3 Composite

Cu-based catalyst is active for methanol steam reforming (MSR) at low temperature. The Cu、Cu+Al2O3 composite and CuO/ZnO/Al2O3 catalytic powers are used as feedstock for coating fabrication by cold spray. MSR experiment and SEM、EDX 、XRD analysis before and after the MSR on the coating has been carried out to study the micostructure and catalytic characteristic of the deposits. Results show that, after reaction the morphology of the Cu coating changes from piled sheets structure to mciro-ramify structure, its porosity obviously increase, the net weight of O、Al in the coating increases, H2 content in the reaction products reaches 74.9%. While for the Cu+Al2O3 composite coating, the content of copper in the coating decreases compared with the initial powder, and the stability of Cu+Al2O3 coating is better than the copper coating in MSR reaction. Particle bonding between coating and substrate and the bonding between the particles in the coating is mainly belonged to mechanical bite and physical bonding; Porosity in the latter two coating is higher than the copper coating. But there is no phase change of the coating. CuO/ZnO/Al2O3 coating shows a much higher activity than conventional fixed bed catalyst due to the reduction of heat and mass transfer resistance in the reactor. So it is available to fabricate catalytic coating by cold spray.

Study of Selected Properties of Coatings Devoted to Extreme Tribo-Corrosive Conditions

2015 ◽  
Vol 818 ◽  
pp. 32-36 ◽  
Author(s):  
Anna Guzanová ◽  
Janette Brezinová ◽  
Jozef Bronček ◽  
Pavlo Maruschak ◽  
Mariana Landová
Keyword(s):  
Aqueous Solution ◽  
Wear Resistance ◽  
Point Of View ◽  
Metallographic Analysis ◽  
High Velocity Oxygen Fuel ◽  
Corrosive Environment ◽  
Properties Of Coatings ◽  
Pin On Disc ◽  
Oxygen Fuel ◽  
Fuel Technology

The paper deals with the evaluation of coatings CoMoCrSi and WC-NiMoCrFeCo applied by High Velocity Oxygen Fuel technology from point of view of their suitability for renovation of sink roll in hot dip galvanizing line. The structure of the coatings was evaluated by metallographic analysis. The adhesion of the coatings as-sprayed and after thermal cyclic loading was determined by pull-off test. Wear resistance of the coatings was evaluated by pin-on-disc test in the corrosive environment of 1M aqueous solution of NaCl.

Metallization of polyether ether ketone (PEEK) by copper coating via cold spray

2018 ◽  
Vol 342 ◽  
pp. 209-219 ◽  
Author(s):  
Chaoyue Chen ◽  
Xinliang Xie ◽  
Yingchun Xie ◽  
Xincheng Yan ◽  
Chunjie Huang ◽  
...  
Keyword(s):  
Cold Spray ◽  
Copper Coating ◽  
Polyether Ether Ketone ◽  
Ether Ketone

Corrosion of Cold Spray Deposited Copper Coating on Steel Substrates

CORROSION ◽  
10.5006/1757 ◽  
2015 ◽  
Vol 71 (10) ◽  
pp. 1237-1247 ◽  
Author(s):  
Raheleh Partovi-Nia ◽  
Sridhar Ramamurthy ◽  
Dmitrij Zagidulin ◽  
Jian Chen ◽  
Rebecca Jacklin ◽  
...  
Keyword(s):  
Cold Spray ◽  
Copper Coating ◽  
Steel Substrates
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