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

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

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 Mo2 NiB2 containing hard materials. The firs...

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Bibliographic Details
Main Authors: Moghaddam Sevinch Rahimi, Derin Bora, Yucel Onuralp, Sonmez M. Seref, Sezen Meltem, Bakan Feray, Sanin Vladimir N, Andreev Dimitriy E
Format: Article
Language:English
Published: De Gruyter 2019-02-01
Series:High Temperature Materials and Processes
Subjects:
hard materials
mo2nib2
shs
xrd
sem
Online Access:https://doi.org/10.1515/htmp-2019-0020
Description
Summary: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 Mo2 NiB2 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.
ISSN:0334-6455
2191-0324

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