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Microstructural and Mechanical Properties of Flash SPS WC-Co/AISI 304L Diffusion Bonded

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Abstract:

In this study, the bonding of WC-Co cermet to AISI 304L stainless steel was achieved through the flash spark plasma sintering (FSPS) process under a steady pressure of 5 MPa and ultra-short holding durations. The investigation focused on the impact of holding time on interfacial characteristics, diffusion behavior, and mechanical performance. The results demonstrated that prolonged holding times, particularly up to 12 seconds, led to pronounced interfacial deformation and significant diffusion of Co, Ni, and Fe elements across the joint interface. Toughness assessment of the WC-Co cermet near the bonded region was carried out using the Vickers indentation fracture (VIF) technique. The analysis revealed a decline in mechanical integrity with extended holding times, increasing the brittleness of the joint despite the enhanced elemental diffusion between the cermet and the stainless steel.

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Periodical:

Materials Science Forum (Volume 1163)

Pages:

53-58

DOI:

https://doi.org/10.4028/p-PLcd5z

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Online since:

October 2025

Authors:

Bouzid Maamache*, Naima Ouali, Brahim Belkessa, Hakem Maamar, Pavol Hvizdoš, Billel Cheniti

Keywords:

Flash SPS, Fracture Toughness, Inter-Diffusion, Interface, Microstructure, WC-Co Cermet

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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