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Pt+g ￠-Ni3Al+g-Ni/CMSX-4涂層結(jié)構(gòu)的透射電鏡研究
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上海市科學(xué)技術(shù)委員會（08PJ1405200，10JC1405100，09520703300）；國家自然科學(xué)基金（50771061）


TEM Characterization of Pt+g ￠-Ni3Al+g -Ni/CMSX-4 Coating Microstructure
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    摘要:

    通過在CMSX-4鎳基單晶高溫合金表面鍍Pt然后采用包埋滲鋁的方法成功制備Pt改性的Pt+g ￠-Ni3Al+g -Ni/CMSX-4涂層，采用掃描電鏡和透射電鏡研究Pt+g ￠-Ni3Al+g -Ni/CMSX-4涂層的微觀結(jié)構(gòu)。TEM分析表明Pt主要分布于涂層g ￠-Ni3Al相中，且涂層g ￠-Ni3Al相里存在 {111} 孿晶；此外涂層內(nèi)還發(fā)現(xiàn)六方結(jié)構(gòu)富錸的拓?fù)涿芏严啵╩相），點陣常數(shù)為a = 0.473 nm和c = 2.565 nm，首次發(fā)現(xiàn)m 相內(nèi)除了（001）孿晶外還存在（10

    Abstract:

    Pt+g ￠-Ni3Al+g -Ni/CMSX-4 coatings were fabricated by Pt electroplating on CMSX-4 single crystal superalloys substrate and followed by an aluminizing pack cementation process. The microstructure of the Pt+g ￠-Ni3Al+g -Ni/CMSX-4 coating was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). TEM investigation showed that {111} twinning exists in the g ￠-Ni3Al phase, Pt was mainly distributed in the g ￠-Ni3Al. Precipitates were observed in the coatings. Selected area electron diffraction (SAED) reveals that the precipitate was the hexagonal topologically close-packed (TCP) m phase with lattice parameters a=0.473 nm, and c=2.565 nm. Twin domains parallel to (001) and (10

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操光輝,姚培培,Russell Alan M. Pt+g ￠-Ni3Al+g-Ni/CMSX-4涂層結(jié)構(gòu)的透射電鏡研究[J].稀有金屬材料與工程,2012,41(5):847~850.[Cao Guanghui, Yao Peipei, Russell Alan M. TEM Characterization of Pt+g ￠-Ni3Al+g -Ni/CMSX-4 Coating Microstructure[J]. Rare Metal Materials and Engineering,2012,41(5):847~850.]
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  • 收稿日期:2011-05-12
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