EFFECT OF VACUUM HEAT TREATMENT ON OXIDATION RESISTANCE OF SPUTTERED NiCrAlY COATING ONA Ni-BASE SINGLE-CRYSTAL SUPERALLOY

J Chin Soc Corr Pro

2002, Vol. 22

Issue (3): 153-157 DOI:

Research Report

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EFFECT OF VACUUM HEAT TREATMENT ON OXIDATION RESISTANCE OF SPUTTERED NiCrAlY COATING ONA Ni-BASE SINGLE-CRYSTAL SUPERALLOY

Meiheng Li;Zhongyuan Zhang;Xiaofeng Sun

中科院金属所

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Abstract The influence of vacuum heat treatment on NiCrAlY c oating,which was deposited on a Ni-base superalloy substrate by magnetron sputte ring was investigated.It was shown that the sputtered NiCrAlY coating,which cons isted of a two-phase mixture:γ-Ni and β-NiAl phase,had a homogeneous elemental distribution.After vacuum heat treatment,the sputtered NiCrAlY coating mainly c onsisted of γ′-Ni3Al,β-NiAl,and trace of α-Al2O3 phases and the outerm ost layer of the sputtered NiCrAlY coating riched in Al and depleted in Cr.The s puttered NiCrAlY coating after vacuum heat treatment formed α-Al2O3 much ea rlier and the α-Al2O3 scale had a better adherence to the NiCrAlY coating.T herefore vacuum heat treatment improved the oxidation resistance of sputtered Ni CrAlY coating.

Key words: sputtering NiCrAlY coating vacuum heat treatment oxida tion resistance

Received: 29 November 2000

ZTFLH:

TG174.451

Corresponding Authors: Meiheng Li

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Meiheng Li; Zhongyuan Zhang; Xiaofeng Sun. EFFECT OF VACUUM HEAT TREATMENT ON OXIDATION RESISTANCE OF SPUTTERED NiCrAlY COATING ONA Ni-BASE SINGLE-CRYSTAL SUPERALLOY. J Chin Soc Corr Pro, 2002, 22(3): 153-157 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2002/V22/I3/153

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