Pressure- and Additive-Mediated Sintering of B4C at Relatively Low Temperatures

A significant improvement in sinterability of B 4 C was achieved at a relatively low temperature by applying high pressure (2 GPa) and adding a small amount (5 wt pct) of Ni. The sintered B 4 C and Ni powder mixture showed improved hardness in the range of 21 to 32 GPa and improved modulus as compar...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2017-03, Vol.48 (3), p.1230-1235
Main Authors: Goswami, Ramasis, Qadri, Syed B., Wollmershauser, James, Kolel-Veetil, Manoj K., Feygelson, Boris
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Metallic Materials
Nanotechnology
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:A significant improvement in sinterability of B 4 C was achieved at a relatively low temperature by applying high pressure (2 GPa) and adding a small amount (5 wt pct) of Ni. The sintered B 4 C and Ni powder mixture showed improved hardness in the range of 21 to 32 GPa and improved modulus as compared to the sintered B 4 C powder without additive. This is mostly attributed to the formation of Ni 4 B 3 , as characterized by Reitveld refinement method and transmission electron microscopy (TEM), which enhances the bonding between B 4 C particles. These results provide a new avenue toward the development of sintering of B 4 C at relatively low temperatures (
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-016-3905-9