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The studies on the interfacial evolution behavior of ZrO2(ZrB2) active diffusion barrier
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School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an,Northwest Institute for Nonferrous Metal Research,School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an,Northwest Institute for Nonferrous Metal Research,Xi’an

Clc Number:

TG174.44

Fund Project:

The National Basic Research Program of China (973 program 2012CB625102); 2015 Doctoral Innovation Fund at Xi’an University of Architecture and Technology.( 6040300566)

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    Abstract:

    In this paper, two sample groups, N5/(ZrB2+ZrO2)/NiCrAl and N5/ZrO2/NiCrAl, were prepared on Ni-based single crystal alloy (Rene N5) substrate by electron beam physical vapor deposition (EB-PVD). Both sample groups were exposed to isothermal oxidation at 900 °C for 5 h and at 1000 °C, for 250 h, 300 h or 350 h. The microstructural evolution and deterioration failure behavior was investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results suggest that the introduction of ZrB2 decelerates the interfacial reaction rate of the active diffusion barrier of Al2O3 but did not affect the final formation of the Al2O3 diffusion barrier with anti-diffusion properties. Moreover, the introduction of ZrB2 prolongs the service life of active diffusion barrier structure and changes its failure mode.

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[Lintao Liu, Zhengxian Li, Chenxi Yang, Fei He. The studies on the interfacial evolution behavior of ZrO2(ZrB2) active diffusion barrier[J]. Rare Metal Materials and Engineering,2018,47(5):1365~1369.]
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History
  • Received:September 05,2016
  • Revised:November 14,2016
  • Adopted:December 02,2016
  • Online: June 08,2018
  • Published: