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NiCoCrAlYSiB+AlSiY梯度涂层恒温氧化行为
Alternative TitleISOTHERMAL OXIDATION BEHAVIOR OF A NiCoCrAlYSiB+AlSiY GRADIENT COATING
王维新; 姜肃猛; 卫广智; 马军; 宫骏; 孙超
2011
Source Publication金属学报
ISSN0412-1961
Volume47.0Issue:005Pages:578-586
Abstract采用电弧离子镀技术在镍基单晶高温合金基体上制备了NiCoCrAlYSiB涂层和(NiCoCrAlYSiB+AlSiY)梯度涂层,对比研究了2种涂层退火态的组织结构和在1000,1100和1150℃下的恒温氧化行为.结果表明:退火处理后,NiCoCrAlYSiB涂层是由γ/γ相和弥散其中的点状β-NiAl相构成;(NiCoCrAlYSiB+AlSiY)梯度涂层分为两层,外层以β-NiAl相为主,含有少量的Cr3Si相、内层和NiCoCrAlYSiB涂层的结构相似.NiCoCrAlYSiB涂层在1000℃下有良好的抗氧化性能,在1100和1150℃下因表面生成保护性较差的尖晶石相而快速退化;(NiCoCrAlYSiB+AlSiY)梯度涂层在1000—1150℃下均表现出良好的抗高温氧化性能,1100℃度下氧化300 h后仍有大量的β-NiAl相存在,1150℃下氧化300 h后涂层中Al含量仍在8%(质量分数)以上,少量的β-NiAl相和过饱和的γ/γ相可维持表面Al_2O_3膜的形成和修复.
Other AbstractConventional NiCoCrAlYSiB coating and(NiCoCrAlYSiB+AlSiY)gradient coating were prepared by using arc ion plating(AIP)on the Ni base single crystal superalloy substrate. Comparative studies of the morphology and microstructure together with high temperature oxidation behaviors at 1000,1100 and 1150℃for the two different coatings were investigated.The results show that after vacuum annealing,the conventional coating is mainly composed of generalγ′/γand a small quantity ofβ-NiAl dispersed inγ′/γwhile the outer layer of the gradient coating consists ofβ-NiAl and dispersedα-Cr and Cr_3Si inβ-NiAl and the inner layer consists of Cr-rich phases plus minorβ-NiAl.The conventional coating has excellent oxidation resistance only at 1000℃.while it degraded rapidly at 1100℃and 1150℃,on which surface spinel formation was observed;however, the gradient coating has more excellent oxidation resistance than the conventional one at all the three temperatures.After oxidation for 300 h at 1100℃,there still exists a great amount ofβ-NiAl,and even after oxidation for 300 h at 1150℃,Al content is higher than 8%(mass fraction),in which a small amount ofβ-NiAl and supersaturatedγ′/γinsure the formation and self repair of alumina.
Keyword梯度涂层 电弧离子镀 恒温氧化 互扩散
Indexed ByCSCD
Language中文
CSCD IDCSCD:4218739
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/156963
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
王维新,姜肃猛,卫广智,等. NiCoCrAlYSiB+AlSiY梯度涂层恒温氧化行为[J]. 金属学报,2011,47.0(005):578-586.
APA 王维新,姜肃猛,卫广智,马军,宫骏,&孙超.(2011).NiCoCrAlYSiB+AlSiY梯度涂层恒温氧化行为.金属学报,47.0(005),578-586.
MLA 王维新,et al."NiCoCrAlYSiB+AlSiY梯度涂层恒温氧化行为".金属学报 47.0.005(2011):578-586.
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