Microstructure, wear and corrosion behaviors of plasma sprayed NiCrBSi-Zr coating

In this paper, the effect of mechanical vibration with reinforcement particles namely Silicon Carbide (SiC) on microstructure, mechanical properties, wear, and corrosion behaviors of aluminum alloy surface composites fabricated via friction stir processing (FSP) was investigated. The method was entitled friction stir vibration process (FSVP). The results revealed that recrystallized fine grains formed in all processing samples as a result of dynamic recovery and recrystallization, while samples processed in friction stir vibration processing resulted in better grain refinement in the stir zone than in conventional friction stir processing. Compared to conventional friction stir processing, in friction stir vibration processing, the hardness and tensile strength increased due to microstructure modification and better reinforcing distribution. From corrosion analysis, the corrosion resistance of the friction stir vibration processed samples showed a significant increase compared to the friction stir processed specimens. The wear results indicated that the wear resistance of friction stir vibration processed specimens is higher than friction stir processed specimens due to the development of smaller grains and a more homogenous distribution of the strengthening particles as the vibration is applied.

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Influence of laser surface engineering of AISI P20-improved mold steel on wear and corrosion behaviors

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2019.08.006 ◽

2019 ◽

Vol 377 ◽

pp. 124852 ◽

Cited By ~ 5

Author(s):

Changkyoo Park ◽

Ahjin Sim ◽

Sanghoon Ahn ◽

Heeshin Kang ◽

Eun-Joon Chun

Keyword(s):

Surface Engineering ◽

Laser Surface ◽

Wear And Corrosion ◽

Aisi P20 ◽

Laser Surface Engineering ◽

Corrosion Behaviors

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EFFECT OF OXYACETYLENE FLAME REMELTING ON WEAR BEHAVIOUR OF SUPERSONIC AIR-PLASMA SPRAYED NiCrBSi/h-BN COMPOSITE COATINGS

Surface Review and Letters ◽

10.1142/s0218625x17500834 ◽

2016 ◽

Vol 24 (06) ◽

pp. 1750083 ◽

Cited By ~ 3

Author(s):

N. N. ZHANG ◽

D. Y. LIN ◽

B. HE ◽

G. W. ZHANG ◽

Y. ZHANG ◽

...

Keyword(s):

Wear Resistance ◽

Composite Coatings ◽

Alloy Coating ◽

Wear Behaviour ◽

Air Plasma ◽

X Ray ◽

Wear And Corrosion ◽

Before And After ◽

Higher Temperature ◽

Plasma Sprayed

NiCrBSi alloy coatings are widely used in wear and corrosion protection at higher temperature. As a primary hard phase forming element, B element can effectively improve the coating hardness. In this study, the low coefficient of friction of BN with three ratios (10%, 20%, and 30%) was added in order to reduce the wear rate and provide additional B element. The NiCrBSi/h-BN composite coatings were successfully prepared on a cast-iron substrate using supersonic air-plasma spray technology. The phase constitution, microstructure characterization, and microhardness of the coatings before and after oxyacetylene flame remelting were investigated by means of scanning electron microscope (SEM), X-ray diffraction, and energy dispersive analysis of X-ray techniques, respectively. The wear resistance of composite coatings was also tested in this paper. It was found that the microstructure was well refined by remelting treatment and this was beneficial for the adherence between the coating and the substrate, which was nearly 33[Formula: see text]MPa. The wear resistance of the NiCrBSi alloy coating was also improved with the increasing component of h-BN in remelted samples. When the h-BN content reached 30%, the friction coefficient decreased to 0.38 for the remelted coating. The effect of the remelting process on the anti-abrasive property and extension of the material’s wear life was quite important.

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Process Parameter Impact on Suspension-HVOF-Sprayed Cr2O3 Coatings

Journal of Thermal Spray Technology ◽

10.1007/s11666-019-00940-7 ◽

2019 ◽

Vol 28 (8) ◽

pp. 1933-1944 ◽

Cited By ~ 1

Author(s):

Jarkko Kiilakoski ◽

Richard Trache ◽

Stefan Björklund ◽

Shrikant Joshi ◽

Petri Vuoristo

Keyword(s):

Chromium Oxide ◽

High Velocity ◽

Atmospheric Plasma ◽

Promising Alternative ◽

Air Curtain ◽

Resistance To Sliding ◽

Wear And Corrosion ◽

And Performance ◽

Plasma Sprayed ◽

The Impact

Abstract Chromium oxide (Cr2O3) is commonly used as an atmospheric plasma-sprayed (APS) coating from powder feedstock in applications requiring resistance to sliding wear and corrosion, as well as amenability to texturing, e.g., in anilox rolls. Recently, high-velocity oxy-fuel spray methods involving suspension feedstock have been considered an extremely promising alternative to produce denser and more homogeneous chromium oxide coatings with lower as-sprayed surface roughness, higher hardness and potentially superior wear performance compared to conventional APS-sprayed coatings. In this study, the impact of process parameters namely auxiliary air cleaning nozzles and a transverse air curtain on suspension high-velocity oxy-fuel-sprayed Cr2O3 suspensions is presented. The produced coatings are characterized for their microstructure, mechanical properties and wear resistance by cavitation erosion. The results reveal the importance of optimized air nozzles and air curtain to achieve a vastly improved coating structure and performance.

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TRIBALOY T-700

Alloy Digest ◽

10.31399/asm.ad.ni0221 ◽

1975 ◽

Vol 24 (9) ◽

Keyword(s):

Nuclear Reactors ◽

Intermetallic Phase ◽

Heat Treating ◽

Corrosion And Wear ◽

Powder Metal ◽

Wear And Corrosion ◽

Base Matrix ◽

Nickel Base ◽

Wear And Corrosion Resistance ◽

Plasma Sprayed

Abstract TRIBALOY T-700 consists of a hard, intermetallic phase in a softer, nickel-base matrix. It can be cast or hardfaced. As alloy powder it can be plasma sprayed or blended with other powders for P/M (Powder/Metallurgy) processing. It combines outstanding wear and corrosion resistance for use in pumps, extruders, bearings, mixers and particularly elements of nuclear reactors. It has excellent resistance to wear in liquid sodiium. This datasheet provides information on composition, physical properties, hardness, and compressive strength as well as fracture toughness, creep, and fatigue. It also includes information on corrosion and wear resistance as well as heat treating, machining, joining, and powder metal forms. Filing Code: Ni-221. Producer or source: E. I. DuPont de Nemours & Company Inc..

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