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Micropyretic synthesis of NiAl containing Ti and B

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Abstract

The effect of alloying additions of Ti and B on the process of micropyretic synthesis on NiAl and on the microstructure of the synthesized alloy was examined. It was observed that the combustibility of the quaternary alloy is good despite the presence of the alloying elements because of an additional combustion reaction between Ti and B. The microstructure of the quaternary alloy was found to consist primarily of the NiAl and Ti boride phases. The effect of preheating of the specimen prior to synthesis on the process of synthesis was also examined. It was observed that preheating not only can change the morphology of the phases but also influence the nature of the phases present in the alloy. The mechanism of the formation of the two phase microstructure during the synthesis from the elemental powders was established by stopping the combustion front and by carrying out a detailed microstructural characterization of regions around the stopped combustion front.

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Authors and Affiliations

  1. Materials Science Division, Bhabha Atomic Research Centre, 400 085, Trombay, Mumbai, India

    G. K. Dey & A. Arya

  2. International Center for Micropyretics, University of Cincinnati, P.O. Box 210012, 45221, Cincinnati, Ohio, USA

    J. A. Sekhar

Authors
  1. G. K. Dey
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  2. A. Arya
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  3. J. A. Sekhar
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Dey, G.K., Arya, A. & Sekhar, J.A. Micropyretic synthesis of NiAl containing Ti and B. Journal of Materials Research 15, 63–75 (2000). https://doi.org/10.1557/JMR.2000.0014

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