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Majid Zarezadeh Mehrizi

Majid Zarezadeh Mehrizi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-6187-8592
Education: PhD.
ScopusId: 42862660300
HIndex:
Faculty: Engineering
Address: Arak University
Phone:

Research

Title
Laser cladding of CoWSi/WSi2 on Ni substrate and evaluation of its high temperature oxidation behavior
Type
JournalPaper
Keywords
CoWSi/WSi2 coating; Laser cladding; Microstructure; Cyclic oxidation
Year
2014
Journal Ceramics International
DOI
Researchers Majid Zarezadeh Mehrizi ، morteza shamanian ، Ali Saidi ، Reza ShojaRazavi

Abstract

A CoWSi/WSi2 coating was cladded on a nickel substrate using Nd:YAG pulsed laser. Microstructure and composition of the coating were characterized by X-ray diffraction (XRD) as well as scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDS). The microstructure evaluations demonstrated that a uniform free cracks coating was formed, which metallurgically bonded to the substrate. XRD and EDS analysis results showed that some Ni dilution occurred at the coating/substrate interface and that the coating consisted of CoWSi, WSi2 and γ-Co. Cyclic oxidation behavior of the coating indicated that the CoWSi/WSi2 coating could effectively prevent the oxidation of nickel at 1100 1C in air up to 40 h. The oxide scale was composed of CoO, SiO2, WO3 and NiCo2O4.