Study on increasing density of sintered W-1.5Ni alloy by Al-Cu-Zn alloy infiltration
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https://doi.org/10.54939/1859-1043.j.mst.FMC.2026.19-27Keywords:
Tungsten sintering; Alloy infiltration for porous W frame; Al-Cu-Zn alloy infiltration; Activated sintering.Abstract
This paper investigates the densification process of W–1.5%Ni composite mixtures prepared by pressing and sintering methods, achieving an initial relative density of 77–80% to form a porous W skeleton. The isothermal sintering was conducted in a graphite tube furnace at 1700 °C for 3 hours under an Ar protective atmosphere. Nickel (1.5%) was employed as a sintering activator. Subsequently, the remaining pores were filled by infiltration with a 50%Al–30%Cu–20%Zn liquid alloy at 1000 °C for 1 hour. The Al–Cu–Zn alloy infiltration technique proved to be effective in reducing the porosity of the sintered structure and increasing the overall density by approximately 3–5%, thereby enhancing the mechanical properties and thermal stability of the sintered composite. creating a composite material for use as a heat sink material.
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