Optimization of process parameters for spark plasma sintering of nano-structured ferritic Fe-18Cr-2Si alloy

Ihsan ul Haq Toor*, Junaid Ahmed, M. A. Hussein, N. Al-Aqeeli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Spark plasma sintering (SPS) process parameters were optimized in terms of densification, microhardness and corrosion resistance to develop a nano-structured Fe-18Cr-2Si ferritic alloy. The powders were mechanically alloyed (MA) in a planetary ball mill and subsequently SPS was carried out under different processing conditions. Powders and sintered samples were characterized using X-Ray Diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRD phase evolution studies on ball milled powders confirmed the formation of a crystallized alloy after 100 h milling. XRD of sintered alloy confirmed the development of a nano-structured ferritic alloy with a crystallite size in the range of 20–40 nm. Maximum densification of 96.0%, Vickers hardness of 710 HV and pitting potential (Epit = − 430 mVSCE) was achieved at a sintering temperature of 1100 °C, for 15 min holding time, at 50 °C/min of heating rate and at an applied pressure of 60 MPa.

Original languageEnglish
Pages (from-to)62-70
Number of pages9
JournalPowder Technology
Volume299
DOIs
StatePublished - 1 Oct 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

  • Corrosion
  • Mechanical alloying
  • Spark plasma sintering
  • Stainless steel alloys
  • X-Ray Diffraction

ASJC Scopus subject areas

  • General Chemical Engineering

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