CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
The critical role of Si doping in enhancing the stability of M6C carbides
Jiang, L; Ye, XX; Wang, ZQ; Yu, C; Dong, JS; Xie, RB; Li, ZJ; Yan, L; Sham, TK; Zhou, XT; Li, AM
2017
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume728Issue:-Pages:917-926
Subtype期刊论文
AbstractM6C carbides are one of the most common second phases in high speed steels and superalloys, and also an alternative catalytic materials for energy applications. Although the influences of Si doping on the stability of M6C carbides have been frequently observed in different alloys, the atomic-scale mechanism of which remains poorly understood. Here we obtain the Ni3Mo3C-type M6C carbides in GH3535 alloys and evaluate the dependence of their structure and composition on Si contents. Combining high-energy synchrotron X-ray diffraction and first-principle calculations, Si atoms are found to preferentially occupy Ni (16d) sites in Ni3Mo3C structure. The electronic structures and Si K-edge x-ray absorption near edge structures demonstrate the band hybridization and charge transfer between Si atoms and the nearest-neighbor Ni (32e) and Mo (48f) atoms in Si-doped Ni3Mo3C structures, which is responsible for the stability of M6C carbides. (C) 2017 Elsevier B.V. All rights reserved.
KeywordHigh-speed Steels Oxygen Reduction Reaction Term Thermal Exposure Mo-cr Superalloy Mechanical-properties Fuel-cells Silicon Ni Catalyst Fe
DOI10.1016/j.jallcom.2017.09.042
WOS KeywordHIGH-SPEED STEELS ; OXYGEN REDUCTION REACTION ; TERM THERMAL EXPOSURE ; MO-CR SUPERALLOY ; MECHANICAL-PROPERTIES ; FUEL-CELLS ; SILICON ; NI ; CATALYST ; FE
Indexed BySCI
Language英语
WOS IDWOS:000412818600107
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28857
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Jiang, L,Ye, XX,Wang, ZQ,et al. The critical role of Si doping in enhancing the stability of M6C carbides[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,728(-):917-926.
APA Jiang, L.,Ye, XX.,Wang, ZQ.,Yu, C.,Dong, JS.,...&Li, AM.(2017).The critical role of Si doping in enhancing the stability of M6C carbides.JOURNAL OF ALLOYS AND COMPOUNDS,728(-),917-926.
MLA Jiang, L,et al."The critical role of Si doping in enhancing the stability of M6C carbides".JOURNAL OF ALLOYS AND COMPOUNDS 728.-(2017):917-926.
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