COMPARISON OF CoNiCrAlY COATINGS PRODUCED BY HVOF AND CGDS-SPRAYING TECHNIQUE

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F15%3APU114583" target="_blank" >RIV/00216305:26210/15:PU114583 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

COMPARISON OF CoNiCrAlY COATINGS PRODUCED BY HVOF AND CGDS-SPRAYING TECHNIQUE

Original language description

CoNiCrAlY bond coats manufactured by the high-velocity oxygen-fuel spraying (HVOF) and cold gas dynamic spraying (CGDS) deposition technique have been investigated and comparison of phase modification is presented in the paper. Even though both techniques accelerate powder particles with high kinetic energy, the resulting coatings differ considerably in their microstructures. In the former, high pressure is created by burning gases such as acetylene, propane or kerosene at high pressure and generating high temperature (3500 to 4500 C) in the gun. This gives high acceleration to powder particles which melt and deposit on substrate layer by layer with splat cool mechanism. On the other hand, large kinetic energy is generated in cold spray by passing carrier gases such as He or N2 through converging-diverging nozzle, with lower gun temperature of around 600 C. Here the particles are not liquid droplets because of lower temperature and the deposition mechanism is not a splat cooling, but a high impact of solid particles, which results in plastic deformation, making very adherent coating. In this work, CoNiCrAlY powder was deposited on Inconel 718 substrate using HVOF and CGDS deposition process. The bond coats microstructural features were characterized by means of SEM and XRD analyses. The experimental results demonstrated that the CoNiCrAlY bond coats prepared by both HVOF and CGDS technique displayed the lower porosity for CGDS microstructure, and therefore CGDS represents an interesting and promising alternative for their manufacturing.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JJ - Other materials

OECD FORD branch

—

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2015

Confidentiality

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

Article name in the collection

METAL 2015

ISBN

978-80-87294-62-8

ISSN

—

e-ISSN

—

Number of pages

6

Pages from-to

152-158

Publisher name

Tanger Ltd.

Place of publication

Brno

Event location

Brno

Event date

Jun 3, 2015

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000374706100178