materials-physics-2018-scientifictracks

22 / 22

Page 65
conferenceseries.com
Volume 6 Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212 Materials Physics 2018
August 16-17, 2018
August 16-17, 2018 | London, UK
4th International Conference on
Condensed Matter and Materials Physics
Synthesis of a stable HCP-FCC mixture phase of the high-entropy superalloys
Al0.15Co 0.18Cr 0.12Fe0.11Ni0.36Ti0.08 at high pressure
Chih Ming Lin
National Tsing Hua University, Taiwan
High-entropy superalloys (HESA), Al 0.15Co0.18Cr0.12Fe0.11 Ni0.36Ti0.08, non-equimolar solid solutions of six elements, represent
a new strategy for the design of materials with properties superior to those of conventional alloys. However, their phase
space remains constrained, with transition metal high-entropy alloys containing FCC γ matrix with localized dispersion of L12
γ' particles. Here, we report the high-pressure synthesis of a stable HCP-FCC mixture phase of the prototypical high-entropy
superalloys Al0.15 Co0.18 Cr0.12Fe0.11Ni 0.36Ti0.08.Thismartensitic transformation begins at 0.55GPa and is attributed to suppression of
the local magnetic moments, destabilizing the initial FCC γ structure. However, the behaviour of Al0.15 Co0.18Cr 0.12Fe0.11Ni0.36Ti0.08
is unique in that the HCP phase is retained following decompression to ambient pressure, yielding a stable HCP-FCC mixture
phase. This demonstrates a means of tuning the structures and properties of high-entropy superalloys in a manner not
achievable by conventional processing techniques.
Recent Publications:
1. Lin CM et al. (2014) Pressure-induced structural phase transition in bulk Zn0.98Mn0.02 O by angular dispersive X-ray
diffraction. J. Alloys and Compounds. 604C:298-303. Doi:10.1016/j.jaillcom.2014.03.055.
2. Lin C M et al. (2015) Pressure-Induced Phase Transitions in InAs studied by angular-dispersive x-ray diffraction and
roman spectroscopy. Science of Advanced Materials. 7:1039-1044. Doi:10.1166/sam.2015.2174.
3. Huang J M et al. (2015) In situ Al-doped ZnO films by atomic layer deposition with an interrupted flow. Material
Chemistry and Physics. 165:245-252. Doi:10.1016/j.matchemphys.2015.09.024.
4. Lin K L et al. (2016) Structural properties of pressure-induced structural phase transition of Si-doped GaAs by angular
dispersive X-ray diffraction. Appl. Phys. A. 122(2):117. Doi:10.1007/s00339-016-9660-3.
5. Huang J M et al. (2016) Enhanced electrical properties and field emission characteristics of AZO/ZnO-nanowire
core–shell structures. Phys. Chem. Chem. Phys. 18(22):15251-15259. Doi: 10.1038/s41598-018-19679-2.
Biography
Chih Ming Lin has his expertise in evaluation and passion in improving the health and wellbeing. Her open and contextual evaluation model based on responsive
constructivists creates new pathways for improving healthcare. His research interest include: the physical properties of high-entropy alloys (HEAs) and Topological
insulators (TIs) materials under high pressure and the process of synthesis of high-entropy alloys (HEAs) and Topological insulators (TIs) materials.
Chih Ming Lin, Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C2-017