TY - JOUR
T1 - Influence of process parameters on the sintering behaviour and densification of NiAl intermetallics fabricated by spark plasma sintering
AU - Awotunde, Mary
AU - Olubambi, Peter
AU - Chen, Daolun
N1 - Publisher Copyright:
© 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Symposium on Nanostructured, Nanoengineered and Advanced Materials.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - This work reports the results gathered from the consolidation of nickel aluminide (NiAl) intermetallics via spark plasma sintering (SPS) using different processing parameters. Two samples were fabricated and compared, one at a sintering temperature of 1000 ℃ for a dwell time of 7 min and the other at 1200 ℃ for 15 min. The SPS profiles were investigated to determine their impact on the resulting microstructures and mechanical properties of the NiAl intermetallics. The obtained results showed that the sample sintered at a higher temperature and a longer dwell time exhibited a higher density and a better microstructure, with a lower amount of porosity. These translated to a higher average hardness value with a smaller scatter due to superior bonding between the atoms associated with more complete diffusion.
AB - This work reports the results gathered from the consolidation of nickel aluminide (NiAl) intermetallics via spark plasma sintering (SPS) using different processing parameters. Two samples were fabricated and compared, one at a sintering temperature of 1000 ℃ for a dwell time of 7 min and the other at 1200 ℃ for 15 min. The SPS profiles were investigated to determine their impact on the resulting microstructures and mechanical properties of the NiAl intermetallics. The obtained results showed that the sample sintered at a higher temperature and a longer dwell time exhibited a higher density and a better microstructure, with a lower amount of porosity. These translated to a higher average hardness value with a smaller scatter due to superior bonding between the atoms associated with more complete diffusion.
KW - Inter-particle bonding
KW - Mechanical properties
KW - Nickel aluminide
KW - Sintering profiles
KW - Spark plasma sintering
UR - http://www.scopus.com/inward/record.url?scp=85105542482&partnerID=8YFLogxK
U2 - 10.1016/j.matpr.2020.07.142
DO - 10.1016/j.matpr.2020.07.142
M3 - Conference article
AN - SCOPUS:85105542482
SN - 2214-7853
VL - 38
SP - 1159
EP - 1163
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
T2 - 2020 International Symposium on Nanostructured, Nanoengineered and Advanced Materials, ISNNAM 2020
Y2 - 30 April 2020 through 3 May 2020
ER -