Publication detail

Wear of Gas-flame Composite Coatings with Tungsten and Nickel Matrix. Part II. Erosive Wear

M. KANDEVA, P. SVOBODA, ZH. KALITCHIN, T. PENYASHKI, G. KOSTADINOV

Original Title

Wear of Gas-flame Composite Coatings with Tungsten and Nickel Matrix. Part II. Erosive Wear

Type

journal article in Web of Science

Language

English

Original Abstract

The object of the investigation is characterising the wear and wear resistance of composite powder coatings, deposited by supersonic flame stream (i.e. High Velocity Oxygen-Fuel (HVOF) spraying). Two groups of coatings have been obtained – powder composites of tungsten and nickel matrices, whereupon each group includes coatings having different sizes of the powder particles. The coatings have been tested in two cases – during abrasion and erosion. The research work consists of two parts. The first part represents the results on the characteristics of wear during dry friction on the surface with fixed attached abrasive particles. Results are presented here on the wearing of the coatings under the effect of air stream, carrying solid abrasive particles (erosion wear), more specifically – mass erosion wear, erosion rate, erosion intensity, absolute and relative wear resistance under identical conditions of erosion of the coatings. It has been found out that upon increasing the size of the particles 4 times from 11 to 45 μm in the case of coatings with tungsten matrix the wear resistance grows up 2.1 times, while in the case of coatings with nickel matrix the growth of the erosion resistance is insignificant – 1.2 times. The comparative results on the wear of the tested coatings during abrasion and erosion show different tendencies in the influence of the sizes on the wear and wear resistance. The abrasive wear resistance of the two kinds of coatings is greater in the case of smaller sizes of the powder particles. The same coatings in the case of erosion possess lower wear resistance, i.e. lower resistant ability under the impact effect of the abrasive particles in the air stream.

Keywords

HVOF coatings, tribology, abrasion wear, erosive wear.

Authors

M. KANDEVA, P. SVOBODA, ZH. KALITCHIN, T. PENYASHKI, G. KOSTADINOV

Released

1. 10. 2019

Publisher

SCIBULCOM LTD

Location

BULGARIA

ISBN

1311-5065

Periodical

J ENVIRON PROT ECOL

Year of study

20

Number

3

State

Republic of Bulgaria

Pages from

1292

Pages to

1302

Pages count

11

URL

https://docs.google.com/a/jepe-journal.info/viewer?a=v&pid=sites&srcid=amVwZS1qb3VybmFsLmluZm98amVwZS1qb3VybmFsfGd4OjMxZWE0ZGViM2IzYjYyOGI

BibTex

@article{BUT159627,
  author="Petr {Svoboda}",
  title="Wear of Gas-flame Composite Coatings with Tungsten and Nickel Matrix. Part II. Erosive Wear",
  journal="J ENVIRON PROT ECOL",
  year="2019",
  volume="20",
  number="3",
  pages="1292--1302",
  issn="1311-5065",
  url="https://docs.google.com/a/jepe-journal.info/viewer?a=v&pid=sites&srcid=amVwZS1qb3VybmFsLmluZm98amVwZS1qb3VybmFsfGd4OjMxZWE0ZGViM2IzYjYyOGI"
}