Effect of Nozzle Geometry on the Microstructure and Properties of HVAF Sprayed WC-10Co4Cr and Cr3C2 -25NiCr Coatings

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43951188" target="_blank" >RIV/49777513:23640/18:43951188 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s11666-018-0717-z" target="_blank" >http://dx.doi.org/10.1007/s11666-018-0717-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11666-018-0717-z" target="_blank" >10.1007/s11666-018-0717-z</a>

Result language

angličtina

Original language name

Effect of Nozzle Geometry on the Microstructure and Properties of HVAF Sprayed WC-10Co4Cr and Cr3C2 -25NiCr Coatings

Original language description

Thermally sprayed hard metal coatings are the industrial standard solution for numerous demanding applications to improve wear resistance. In the aim of improving coating quality by utilising finer particle size distributions, several approaches have been studied to control the spray temperature. The most viable solution is to use the modern high velocity air-fuel (HVAF) spray process, which has already proven to produce high-quality coatings with dense structures. In HVAF spray process, the particle heating and acceleration can be efficiently controlled by changing the nozzle geometry. In this study, fine WC-10Co4Cr and Cr3C2-25NiCr powders were sprayed with three nozzle geometries to investigate their effect on the particle temperature, velocity and coating microstructure. The study demonstrates that the particle melting and resulting carbide dissolution can be efficiently controlled by changing the nozzle geometry from cylindrical to convergent–divergent. Moreover, the average particle velocity was increased from 780 to over 900 m/s. The increase in particle velocity significantly improved the coating structure and density. Further evaluation was carried out to resolve the effect of particle in-flight parameters on coating structure and cavitation erosion resistance, which was significantly improved in the case of WC-10Co4Cr coatings with the increasing average particle velocity.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20506 - Coating and films

Project

<a href="/en/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

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

—

Volume of the periodical

27

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

680-694

UT code for WoS article

000430378200011

EID of the result in the Scopus database

2-s2.0-85045088095