ISOTHERMAL OXIDATION BEHAVIOR OF SPUTTERED IN738  NANOCRYSTALLINE COATING

J Chin Soc Corr Pro

2001, Vol. 21

Issue (3): 137-143 DOI:

Research Report

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ISOTHERMAL OXIDATION BEHAVIOR OF SPUTTERED IN738 NANOCRYSTALLINE COATING

Shujiang Geng;Fuhui Wang;Shenglong Zhu

中科院金属所;金属腐蚀与防护国家重点实验室

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Abstract A sputtered nanocrystalline coating of IN738 alloy was obtained by means of magnetron sputtering.The isothermal oxidation behavior of the bulk alloy and nanocrystalline coating of IN738 in air was studied.The r esults indicated that a double external oxide scale was formed on the nanocrysta lline coating at 900℃ and 1000℃ without internal oxidation and nitridation.Th e scale consisted of an outer part of main Cr2O3 and an inner part of a cont inuous Al2O3 scale,which offered good adhesive and protectiveness.However, at 800℃ the inner continuous Al2O3 scale was not formed on the coating.Th e oxidation mechanism of the nanocrystalline coating was also discussed.

Key words: sputtering IN738 alloy nanocrystalline oxidation

Received: 30 December 2000

ZTFLH:

TG172.82

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Shujiang Geng; Fuhui Wang; Shenglong Zhu. ISOTHERMAL OXIDATION BEHAVIOR OF SPUTTERED IN738 NANOCRYSTALLINE COATING. J Chin Soc Corr Pro, 2001, 21(3): 137-143 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2001/V21/I3/137

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