A Nanosized WO₃ and CuO powder mixture is prepared using novel high-energy ball milling in a bead mill to obtain a W-Cu nanocomposite powder, and the effect of milling time on the structural characteristics of WO₃-CuO powder mixtures is investigated. The results show that the ball-milled WO₃-CuO powder mixture reaches at steady state after 10 h milling, characterized by the uniform and narrow particle size distribution with primary crystalline sizes below 50 nm, a specific surface area of 37 m²/g, and powder mean particle size (D₅₀) of 0.57 μm. The WO₃-CuO powder mixtures milled for 10 h are heat-treated at different temperatures in H₂ atmosphere to produce W-Cu powder. The XRD results shows that both the WO₃ and CuO phases can be reduced to W and Cu phases at temperatures over 700°C. The reduced W-Cu nanocomposite powder exhibits excellent sinterability, and the ultrafine W-Cu composite can be obtained by the Cu liquid phase sintering process.

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• Morphological Characteristics of W/Cu Composite Nanoparticles with Complex Phase Structure Synthesized via Reactive Radio Frequency (RF) Thermal Plasma
  Chulwoong Han, Song-Yi Kim, Soobin Kim, Ji-Woon Lee
  Metals.2024; 14(9): 1070.     CrossRef