Production of Al-Co-Ni ternary alloys by the SHS method for use in nickel based superalloys manufacturing

Murat Alkan*, M. Seref Sonmez, Bora Derin, Onuralp Yücel, Dmitrii E. Andreev, Vladimir N. Sanin, Vladimir I. Yukhvid

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In this study, Al-Co-Ni ternary alloys were synthesized, in order to obtain low-cost starting material for Ni-based superalloy production, by a self-propagating high temperature synthesis (SHS) both under normal gravity conditions (a=9.81 m/s2) and under high gravity conditions (up to 1000 g-force) by using a centrifugal machine. The mixture of Co3O4-NiO powder were reduced by Al powder for the production of SHS alloys with the estimated compositions of 5-10 mass% Al, 20-65 mass% Co, 25-75 mass% Ni. The effect of green mixture compositions and centrifugal overload on combustion temperature, alloy/slag separations, chemical composition and microstructure of final alloys were investigated. The chemical analysis results showed that production of SHS alloys were achieved by having up to 86.12% of Co and 92.32% of Ni recoveries. The highest metal recovery value was obtained in SHS alloy with the estimated composition of 10%Al-65%Co-25%Ni by the addition of 20% Al2O3 into the green mixture. The metal/slag separation efficiency increased by increasing the centrifugal overload.

Original languageEnglish
Pages (from-to)275-283
Number of pages9
JournalHigh Temperature Materials and Processes
Volume34
Issue number3
DOIs
Publication statusPublished - 1 May 2015

Bibliographical note

Publisher Copyright:
© 2015 by De Gruyter 2015.

Funding

Funding: The authors are pleased to acknowledge the financial support for this research from ITU-BAP (Istanbul Technical University, Office of Scientific Researches Projects, Project No. 34419), TUBITAK (The Scientific and Technological Research Council of Turkey, Project No. 109M701), ISMAN (Institute of Structural Macrokinetics and Materials Science, Russian Academy of Science).

FundersFunder number
ISMAN
Institute of Structural Macrokinetics and Materials Science, Russian Academy of Science
Air Force Office of Scientific Research34419
Russian Foundation for Basic Research14-08-91374
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu109M701
Istanbul Teknik Üniversitesi
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi

    Keywords

    • 81.05.Bx

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