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Failure Analysis of Thermally Shocked NiCr Films on Mn-Ni-Co Spinel Oxide Substrates

  • Min-Seok Jeon (a1), Jun-Kwang Song (a1), Eui-Jong Lee (a1), Yong-Nam Kim (a1), Hyun-Gyu Shin (a1) and Hee-Soo Lee (a1)...

Abstract

NiCr films were thermally evaporated on the Mn-Ni-Co-O thick-film substrates. The NiCr/Mn-Ni-Co-O bi-layer systems were tested in a thermal shock chamber with three temperature differences of 150, 175 and 200°C. The systems were considered to have failed when the sheet resistance of NiCr films changed by 30% relative to an initial value. As the cyclic repetition of thermal shock increased, the sheet resistance of NiCr coatings increased. The Coffin-Manson equation was applied to the failure mechanism of cracking of NiCr coatings and the SEM observation of cracks and delamination in NiCr coatings due to thermal cycling agreed well with the failure mechanism.

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Failure Analysis of Thermally Shocked NiCr Films on Mn-Ni-Co Spinel Oxide Substrates

  • Min-Seok Jeon (a1), Jun-Kwang Song (a1), Eui-Jong Lee (a1), Yong-Nam Kim (a1), Hyun-Gyu Shin (a1) and Hee-Soo Lee (a1)...

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