Journal
SCRIPTA MATERIALIA
Volume 134, Issue -, Pages 91-94Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.03.005
Keywords
Spark plasma sintering; Isothermal heat treatments; Diffusion coefficient; Titanium-copper; Pulsed electric current
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Funding
- National Natural Science Foundation of China [51574128, 51627805]
- Guangdong Natural Science Foundation for Research Team [2015A030312003]
- Guangdong Application-oriented Special Funds for Science and Technology RD [2016B090931002]
- Guangdong Special Funds for Public Welfare Research and Capacity Building [2014A010105020]
- US Army Research Office [W911NF-16-1-0269]
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In spark plasma sintering (SPS) it is widely acknowledged that there are specific physicochemical mechanisms associated with atomic diffusion; however, a reaction diffusion rate coefficient K has yet to be determined. In this work, we derive the K of titanium-copper diffusion couples using isothermal heat treatment of pulsed electric current (PEC), generated in SPS system. Our results show that the derived K for CuTi and Cu4Ti is at least two times higher than the corresponding ones determined under conventional annealing. Accordingly, this work substantiates, for the first time, the argument that PEC accelerates atomic diffusion compared with conventional annealing. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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