Development of High Strength Mo2NiB2 Ternary Boride Base Cermets Produced by Reaction Boronizing Sintering

Abstract:

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The effects of V substitution for Cr to the sintering behavior of Cr containing Mo2NiB2 ternary boride base cermets and Mn addition to the mechanical properties and microstructure of the Cr and V containing cermets were investigated by using Ni-5.0B-51.0Mo-(17.5-x)Cr-xV (mass%) and Ni-5.0B-51.0Mo-12.5Cr-5.0V-(0-1.5)Mn (mass%) model cermets. 10mass%V substitution for Cr in the Cr containing cermets markedly improved transverse rupture strength and hardness from 2.27 to 2.94GPa and from 85.3 to 87.2RA respectively and refined the microstructure by retarding the progress of sintering especially at liquid phase sintering stage. Small amount of Mn addition to the Cr and V containing Mo2NiB2 base cermets significantly improved the sinterability and increased the mechanical properties of the cermets.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

803-808

DOI:

10.4028/www.scientific.net/MSF.539-543.803

Citation:

K. Takagi et al., "Development of High Strength Mo2NiB2 Ternary Boride Base Cermets Produced by Reaction Boronizing Sintering", Materials Science Forum, Vols. 539-543, pp. 803-808, 2007

Online since:

March 2007

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$35.00

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