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Iron and Nickel Cellular Structures by Sintering of 3D‐Printed Oxide or Metallic Particle Inks
Author(s) -
Taylor Shan L.,
Jakus Adam E.,
Shah Ramille N.,
Dunand David C.
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600365
Subject(s) - materials science , sintering , composite material , extrusion , oxide , metal , bimetal , cracking , shrinkage , non blocking i/o , metal powder , metallurgy , relative density , nickel oxide , biochemistry , chemistry , catalysis
Inks comprised of metallic Fe or Ni powders, an elastomeric binder, and graded volatility solvents are 3D‐printed via syringe extrusion and sintered to form metallic cellular structures. Similar structures are created from Fe 2 O 3 and NiO particle‐based inks, with an additional hydrogen reduction step before sintering. All sintered structures exhibit 92–98% relative density within their struts, with neither cracking nor visible warping despite extensive volumetric shrinkage (≈70–80%) associated with reduction (for oxide powders) and sintering (for both metal and oxide powders). The cellular architectures, with overall relative densities of 32–49%, exhibit low stiffness (1–6 GPa, due to the particular architecture used), high strength (4–31 MPa), and high ductility, leading to excellent elastic and plastic energy absorption, when subjected to uniaxial compression.