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Diffusivity of Ti-Ni Diffusion Couple Enhanced by Pulse Current During Spark Plasma Sintering

  • Ruidi Li
  • Pengda Niu
  • Shenghua DengEmail author
  • Tiechui Yuan
  • Guanghong Liu
Communication
  • 32 Downloads

Abstract

The effect of pulse current (PC) on the interdiffusion of Ti-Ni system was investigated under spark plasma sintering. The growth rate of Ni-Ti intermetallics under PC was 3.22 to 6.44 times higher than that with direct current (DC). The reaction activation energy of intermetallics at PC was 18.4 to 79.0 kJ/mol, which is lower than the activation energy of 275.1 to 313.9 kJ/mol at DC; thus, the increased growth rate at PC may have resulted from the decrease of activation energy.

Notes

The authors wish to acknowledge the financial support of National Natural Science Foundation of China (51571214, 51874369) and Key Research Project of Hunan Province (2016JC2003, 2015GK3004, 2015JC3006).

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  • Ruidi Li
    • 1
  • Pengda Niu
    • 1
  • Shenghua Deng
    • 2
    Email author
  • Tiechui Yuan
    • 1
  • Guanghong Liu
    • 1
  1. 1.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaP.R. China
  2. 2.School of Material Science and EngineeringJiangxi University of Science and TechnologyGanzhouP.R. China

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