Novel utilization of liquid feedstock in high velocity air fuel (HVAF) spraying to deposit solid lubricant reinforced wear resistant coatings
Artikel i vetenskaplig tidskrift, 2021

The ability to axially inject liquid feedstock has encouraged the thermal spray research community to explore
this concept to deposit coatings for various next generation functional applications. The current study explores
the utilization of liquid feedstock in high velocity air fuel (HVAF) spraying to deposit solid lubricant reinforced
wear resistant coatings for the first time. The study successfully demonstrates the use of a powder-suspension
hybrid processing approach to incorporate a solid lubricant Boron Nitride (as suspension) in a wear resistant
Cr3C2–NiCr (as powder) cermet matrix. Coatings were characterized using Scanning Electron Microscopy and
Raman Spectroscopy to analyze their microstructure and phase constitution. The results show that the tribological
performance of the hexagonal boron nitride (hBN)-incorporated composite coating was significantly
better than the traditional powder-derived Cr3C2–NiCr coating. Such hBN-incorporated composite coatings are
needed to improve the mechanical properties and enhance the overall tribological performance of metallic
components used in various applications, especially at high temperature such as cylinder bore, pistons, deformation
tools, etc. The limitations of liquid based lubricants at high temperature motivates the use of hBN
reinforced composite coatings as it can form a protective solid lubrication tribo-film. The study concludes that
the emerging HVAF technology can accommodate liquid feedstock and be successfully utilized to deposit hybrid
powder-suspension composite coatings to create multi length scale microstructures which can be attractive for
combining different tribological attributes in the same coatings system.

Wear

Coatings

HVAF

Boron nitride

Hybrid

Suspension

Författare

Ashish Ganvir

Turku University of Applied Sciences

Högskolan Väst

Adwait Rajeev Jahagirdar

Högskolan Väst

Antonio Mulone

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Louise Örnfeldt

Chalmers

Stefan Bjorklund

Högskolan Väst

Uta Klement

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Shrikant Joshi

Högskolan Väst

Journal of Materials Processing Technology

0924-0136 (ISSN)

Vol. 295 117203

Deponering av grafenhaltiga beläggningar på stora ytor för olika funktionella tillämpningar

VINNOVA, 2018-12-01 -- 2020-12-31.

VINNOVA, 2018-12-01 -- 2020-12-31.

Drivkrafter

Hållbar utveckling

Ämneskategorier

Materialteknik

Annan materialteknik

Styrkeområden

Produktion

Materialvetenskap

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1016/j.jmatprotec.2021.117203

Mer information

Senast uppdaterat

2021-05-09