Interdiffusion between copper and nickel powders and sintering map development during spark plasma sintering

摘要

An investigation into spark plasma sintering was performed using Cu-Ni powder blends. Pucks were sintered between 700 and 900 degrees C. Isolated copper particles were analyzed by energy-dispersive spectroscopy. Compositional maps and diffusion coefficients showed that diffusion was uniform in all directions, while activation energies demonstrated an increase in diffusion efficiency. A solution to the diffusion equation was used to model sintering times to obtain homogeneous components, given various powder blend compositions, and the results were experimentally validated. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.