Tribological Properties of Hard Metal Coatings Sprayed by High-Velocity Air Fuel Process

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F16%3A43928131" target="_blank" >RIV/49777513:23640/16:43928131 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s11666-015-0285-4" target="_blank" >http://dx.doi.org/10.1007/s11666-015-0285-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11666-015-0285-4" target="_blank" >10.1007/s11666-015-0285-4</a>

Result language

angličtina

Original language name

Tribological Properties of Hard Metal Coatings Sprayed by High-Velocity Air Fuel Process

Original language description

Lowering the thermal energy and increasing the kinetic energy of hard metal particles sprayed by the newly developed HVAF systems can significantly reduce their decarburization, and increases the sliding wear and corrosion resistance of the resulting coatings, making the HVAF technique attractive, both economically and environmentally, over its HVOF predecessors. Two agglomerated and sintered feedstock powder chemistries, WC-Co (88/12) and WC-CoCr (86/10/4), respectively, with increasing primary carbides grain size from 0.2 to 4.0 microns, have been deposited by the latest HVAF-M3 process onto carbon steel substrates. Their dry sliding wear behaviors and friction coefficients were evaluated at room temperature via Ball-on-disk (ASTM G99-90) wear tests against Al2O3 counterparts, and via Pin-on-disk (ASTM G77-05) wear tests against modified martensitic steel counterparts in both dry and lubricated conditions. Sliding wear mechanisms, with the formation of wavy surface morphology and brittle cracking, are discussed regarding the distribution and size of primary carbides. Corrosion behaviors were evaluated via standard Neutral Salt Spray, Acetic Acid Salt Spray, accelerated corrosion test, and electrochemical polarization test at room temperature. The optimization of the tribological properties of the coatings is discussed, focusing on the suitable selection of primary carbide size for different working load applications.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JK - Corrosion and material surfaces

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Thermal Spray Technology

ISSN

1059-9630

e-ISSN

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Volume of the periodical

25

Issue of the periodical within the volume

1-2

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

331-345

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84953639648