J. Mater. Sci. Technol. ›› 1993, Vol. 9 ›› Issue (2): 116-120.

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Morphology and Microstructure of Sputtered Superalloy Coating

Bangjie XIA+;Hanyi LOU;Lixin ZHANG, Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals, Academia Sinica, Shenyang, 110015, China   

  • 收稿日期:1993-03-28 修回日期:1993-03-28 出版日期:1993-03-28 发布日期:2009-10-10

Morphology and Microstructure of Sputtered Superalloy Coating

Bangjie XIA+;Hanyi LOU;Lixin ZHANG, Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals, Academia Sinica, Shenyang, 110015, China   

  • Received:1993-03-28 Revised:1993-03-28 Online:1993-03-28 Published:2009-10-10

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摘要： <正> The morphology and microstructure of magnetron sputtered coating of superalloy K38G on cast al-loy K38G have been investigated by means of SEM, TEM and XRD. The results indicate that thesputtered coating is identical to the substrate in chemical composition but it is composed only of γphase without γ'. The sputtered superalloy coating presents columnar structure and the grain size isin the range of 20-100 nm. There are a great number of planar defects such as stacking faults andmicrotwins in the coating. The morphology and microstructure of the sputtered coating may haveclose relation to the remarkable increase of oxidation resistance of the coating.

Abstract: The morphology and microstructure of magnetron sputtered coating of superalloy K38G on cast al- loy K38G have been investigated by means of SEM, TEM and XRD. The results indicate that the sputtered coating is identical to the substrate in chemical composition but it is composed only of γ phase without γ'. The sputtered superalloy coating presents columnar structure and the grain size is in the range of 20-100 nm. There are a great number of planar defects such as stacking faults and microtwins in the coating. The morphology and microstructure of the sputtered coating may have close relation to the remarkable increase of oxidation resistance of the coating.

Key words: sputtering, superalloy, coating