Published January 1, 2019 | Version v1
Journal article Open

Production of Mo2NiB2 Based Hard Alloys by Self-Propagating High-Temperature Synthesis

  • 1. Istanbul Tech Univ, Met & Mat Engn Dept, Istanbul, Turkey
  • 2. Sabanci Univ, Nanotechnol Res & Appl Ctr, Istanbul, Turkey
  • 3. Russian Acad Sci, Inst Struct Macrokinet & Mat Sci, Moscow, Russia

Description

Mo-Ni-B-Al as-cast alloys containing 35.5-58.7 wt% Mo, 23.0-57.6 wt% Ni, 3.3-5.2 wt% B, and 2.2-13.5 wt% Al were synthesized by Self-Propagating High-Temperature Synthesis (SHS) using a mixture of MoO3, NiO, B2O3 and Al powders in order to obtain low-cost Mo2NiB2 containing hard materials. The first series of experiments were performed using 1.05 times the stoichiometric amount of Al. In the second series of experiments, FactSage thermochemical modeling software was used to minimize Al increasing the Mo2NiB2 formation in the as-cast alloys. The products were characterized by using atomic absorption spectrometry (AAS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-hardness techniques.

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