Fabrication and characterization of Mo-Cu nano-composite powders by a chemical co-deposition technique

In this work, a method of chemical co-precipitation combined with hydrogen reduction was used to prepare Mo-25Cu nanopowder. Phase distribution and thermodynamic analysis of the powder with calcination and reduction at different temperatures were analyzed, and the reaction mechanism was obtained. The prepared Mo-25Cu nanopowder sintered at high temperature to form the alloy block, and the microstructure, morphology and properties of the Mo-Cu composite were compared with those of the Mo-Cu alloy sintered directly with mixed powder in micron size. Mo-25Cu compacts prepared by sintering at 1200 degrees C in a hydrogen atmosphere with synthetic powder show good sinterability and excellent physical as well as mechanical properties with a relative density of 96.6%, electrical conductivity of 36.2%IACS and Vickers hardness of 2.68 GPa, respectively. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

A method of chemical co-precipitation combined with hydrogen reduction was used to prepare Mo-25Cu nanopowder with good sinterability and excellent physical and mechanical properties. The powder was analyzed for phase distribution, thermodynamic behavior, and reaction mechanisms at different temperatures, leading to the comparison of the microstructure, morphology, and properties of Mo-Cu composite with those directly sintered from mixed micron-sized powder.