Abstract
| Language | English |
|---|---|
| Title of host publication | 4th International Conference on New Forming Technology (ICNFT 2015) |
| Editors | Y. Qin, A. Dean, J. Lin, S. J. Yuan, F. Vollertsen |
| Number of pages | 7 |
| DOIs | |
| Publication status | Published - 10 Aug 2015 |
Publication series
| Name | MATEC Web of Conferences |
|---|---|
| Publisher | EDP Sciences |
| Volume | 21 |
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Keywords
- fabrication
- nitinol
- alloys
- vacuum sintering
- thermal explosion mode
- spark plasma sintering
- microforming
- nickel
- titanium
Cite this
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Fabrication of NiTi shape memory alloy by Micro-FAST. / Huang, Kunlan; Qin, Yi; Zhao, Jie; Bin Zulkipli, Muhammad; Hijji, Hasan.
4th International Conference on New Forming Technology (ICNFT 2015). ed. / Y. Qin; A. Dean; J. Lin; S. J. Yuan; F. Vollertsen. 2015. 10003 (MATEC Web of Conferences; Vol. 21).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Fabrication of NiTi shape memory alloy by Micro-FAST
AU - Huang, Kunlan
AU - Qin, Yi
AU - Zhao, Jie
AU - Bin Zulkipli, Muhammad
AU - Hijji, Hasan
PY - 2015/8/10
Y1 - 2015/8/10
N2 - A NiTi shape memory alloy, known as nitinol, has been intensively studied for last five decades. The NiTi alloy with large size is commonly produced by vacuum sintering, thermal explosion mode of self-propagating high-temperature synthesis (TE-SHS) and spark plasma sintering (SPS). These methods are, however, rarely utilized for the forming of miniature and micro-sized components and have their own limits and disadvantages, such as long process chains and low efficiency with the processes. In the study reported in this paper, an innovation in rapid powder consolidation technology, called Micro-FAST (combining micro-forming and electric-current activated sintering techniques (FAST)) is introduced for the forming of micro-components in which the loose powders are loaded directly into the die, followed by electric-sintering. In the study, Φ4.0 mm × 4.0 mm miniature cylinders were formed with pre-alloyed NiTi powders. Sintered sample with relative density of 98.65% has been fabricated at a sintering temperature of 1150 °C in a relatively short cycle time (119.5 s). Based on the results of SEM and XRD, it was found that the densified samples with Ni3Ti, NiTi and NiTi2 phases were produced.
AB - A NiTi shape memory alloy, known as nitinol, has been intensively studied for last five decades. The NiTi alloy with large size is commonly produced by vacuum sintering, thermal explosion mode of self-propagating high-temperature synthesis (TE-SHS) and spark plasma sintering (SPS). These methods are, however, rarely utilized for the forming of miniature and micro-sized components and have their own limits and disadvantages, such as long process chains and low efficiency with the processes. In the study reported in this paper, an innovation in rapid powder consolidation technology, called Micro-FAST (combining micro-forming and electric-current activated sintering techniques (FAST)) is introduced for the forming of micro-components in which the loose powders are loaded directly into the die, followed by electric-sintering. In the study, Φ4.0 mm × 4.0 mm miniature cylinders were formed with pre-alloyed NiTi powders. Sintered sample with relative density of 98.65% has been fabricated at a sintering temperature of 1150 °C in a relatively short cycle time (119.5 s). Based on the results of SEM and XRD, it was found that the densified samples with Ni3Ti, NiTi and NiTi2 phases were produced.
KW - fabrication
KW - nitinol
KW - alloys
KW - vacuum sintering
KW - thermal explosion mode
KW - spark plasma sintering
KW - microforming
KW - nickel
KW - titanium
UR - http://www.icnft2015.com/
U2 - 10.1051/matecconf/20152110003
DO - 10.1051/matecconf/20152110003
M3 - Conference contribution book
SN - 9782759818235
T3 - MATEC Web of Conferences
BT - 4th International Conference on New Forming Technology (ICNFT 2015)
A2 - Qin, Y.
A2 - Dean, A.
A2 - Lin, J.
A2 - Yuan, S. J.
A2 - Vollertsen, F.
ER -