TY - JOUR
T1 - Pack Aluminization Assisted Enhancement of Thermo-mechanical Properties in Nickel Inverse Opal Structures
AU - Shetty, Pralav P.
AU - Zhang, Runyu
AU - Angle, Jesse P.
AU - Braun, Paul V.
AU - Krogstad, Jessica A.
N1 - Funding Information:
The manuscript was written through contributions from all authors. All authors have given approval to the final version of the manuscript. Funding The authors would like to acknowledge the funding and technical support from BP through the BP International Centre for Advanced Materials (BP-ICAM), which made this research possible. Notes The authors declare no competing financial interest.
Publisher Copyright:
© 2018 American Chemical Society.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/3/13
Y1 - 2018/3/13
N2 - A low temperature, vapor phase approach to improve the thermal stability of nonrefractory deterministically structured inverse opals is demonstrated. Specifically, pack aluminization at 550 °C was conducted on Ni inverse opals, introducing controlled amounts of Al into the structure. This enabled the formation of a strengthening Ni3Al phase, resulting in enhanced high temperature strength and stability. Following aluminization, the deterministic structures remained stable up to 1000 °C, a 500 °C increase relative to the starting Ni inverse opals. The thermal stability of the aluminized structures is comparable to that of much more difficult to fabricate deterministically structured refractory structures. Additionally, the pack aluminized structures exhibited a 17.6% increase in elastic modulus and an 81.6% increase in hardness relative to the initial Ni inverse opal. This is a promising combination of thermo-mechanical properties for very fine, deterministic structures used in high temperature, chemically harsh environments.
AB - A low temperature, vapor phase approach to improve the thermal stability of nonrefractory deterministically structured inverse opals is demonstrated. Specifically, pack aluminization at 550 °C was conducted on Ni inverse opals, introducing controlled amounts of Al into the structure. This enabled the formation of a strengthening Ni3Al phase, resulting in enhanced high temperature strength and stability. Following aluminization, the deterministic structures remained stable up to 1000 °C, a 500 °C increase relative to the starting Ni inverse opals. The thermal stability of the aluminized structures is comparable to that of much more difficult to fabricate deterministically structured refractory structures. Additionally, the pack aluminized structures exhibited a 17.6% increase in elastic modulus and an 81.6% increase in hardness relative to the initial Ni inverse opal. This is a promising combination of thermo-mechanical properties for very fine, deterministic structures used in high temperature, chemically harsh environments.
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U2 - 10.1021/acs.chemmater.7b04988
DO - 10.1021/acs.chemmater.7b04988
M3 - Article
AN - SCOPUS:85043787950
SN - 0897-4756
VL - 30
SP - 1648
EP - 1654
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 5
ER -