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Pressureless sintering of ultra-low-binder WC-Ni Hardmetals via bimodal powder packing and colloidal processing
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DOI：10.1016/j.ijrmhm.2026.107925.png)
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Abstract
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• Pressureless sintering yields >97% density in WC-Ni hardmetals with 1 vol-% Ni. • Bimodal packing efficiency is maximized at 25–30 vol-% total submicron fraction. • Sintering is accelerated by n-WC, while Ni content defines densification pathways. • XRD and HR-TEM reveal an η-carbide (Ni₂W₄C) interphase between WC and Ni.
Keywords:
Particle packing
Pressureless sintering
Hardmetals
WC-Ni
Nanosized WC
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