NDLI: Influence of Al$_{2}$O$_{3}$ Particle Size on Microstructure, Mechanical Properties and Abrasive Wear Behavior of Flame-Sprayed and Remelted NiCrBSi Coatings

Content Provider	Springer Nature Link
Author	Habib, K. A. Ca, D. L. Caudet, C. T. Damra, M. S. Cervera, I. Bellés, J. Ortells, P.
Copyright Year	2017
Abstract	The influence of micrometric alumina (low surface area-to-volume ratio) and nanometric alumina (high surface area-to-volume ratio) on microstructure, hardness and abrasive wear of a NiCrBSi hardfacing alloy coating applied to an AISI 304 substrate using flame spraying (FS) combined with surface flame melting (SFM) is studied. Remelting after spraying improved the mechanical and tribological properties of the coatings. Microstructural characterization using XRD, SEM and EDS indicated that alumina additions produced similar phases (NiSi, Ni$_{3}$B, CrC and Ni$_{31}$Si$_{12}$) regardless of the alumina size, but the phases differed in morphology, size distribution and relative proportions from one coating to another. The addition of 12 wt.% nanometric Al$_{2}$O$_{3}$ increased the phases concentration more than five- to sixfold and reduced the hard phases size about four-to threefold compared with NiCrBSi + 12 wt.% micrometric Al$_{2}$O$_{3}$. Nanoalumina led to reduced mass loss during abrasive wear compared to micrometric alumina and greater improvement in hardness.
Starting Page	1647
Ending Page	1656
Page Count	10
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	26
Issue Number	4
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2017-03-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	abrasive wear flame spray micrometric and nanometric Al$_{2}$O$_{3}$ NiCrBSi particles surface area surface flame melting Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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