High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys
Gao Shuang1,2; Hou Jieshan1; Yang Fei1; Wang Changshuai1; Zhou Lanzhang1
Corresponding AuthorHou Jieshan(
AbstractHigh temperature oxidation behaviors of cast K317 and K325 alloy at 900 and 1000 degrees C in air environment were contrastively investigated by TGA, XRD and SEM (EDS). The results show that K317 alloy has a superior oxidation resistance compared with K325 alloy. The kinetic curves of the two alloys oxidized at 900 degrees C for 100 h obey the parabolic rate law while those at 1000 degrees C obey sectionally the parabolic rate law. The oxide structure of K317, from the top surface down to the base material, consists of NiO-TiO2-NiCr2O4 composite oxide, Cr2O3 oxide dense band and Al2O3 internal oxide. In comparison, internal oxidation is not observed in K325 alloy whose oxide layer is composed of two oxide layers: NiO-NiCr2O4-Nb2O5 composite oxide and Cr2O3 oxide layer. Serious MoO3 volatilization and oxide spallation take place in K325 alloy after the oxidation at 1000 degrees C for 100 h. In addition, the adhesion property of K325 alloy is worse than that of K317 alloy due to the occurrence of the micro-voids on the oxide layer/substrate interface.
KeywordNi-based superalloy anti-oxidation element oxidation kinetics oxidation mechanism
Indexed BySCI
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000463845300041
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorHou Jieshan
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gao Shuang,Hou Jieshan,Yang Fei,et al. High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(3):960-966.
APA Gao Shuang,Hou Jieshan,Yang Fei,Wang Changshuai,&Zhou Lanzhang.(2019).High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys.RARE METAL MATERIALS AND ENGINEERING,48(3),960-966.
MLA Gao Shuang,et al."High Temperature Oxidation Behaviors of Two Cast Ni-based Superalloys".RARE METAL MATERIALS AND ENGINEERING 48.3(2019):960-966.
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