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题名: Strain-induced ordered structure of titanium carbide during depositing diamond on Ti alloy substrate
作者: Li, X. J.;  He, L. L.;  Li, Y. S.;  Yang, Q.;  Hirose, A.
发表日期: 2017
摘要: During the deposition of diamond films on Ti alloy substrates, titanium carbide is a common precipitated phase, preferentially formed at the interfacial region. However, in this case, the precipitation of an ordered structure of titanium carbide has not been reported. In our work, a long periodic ordered structure of TiC has been observed at the deposited diamond film/Ti alloy interface by high resolution transmission electron microscopy (HRTEM). The long periodic ordered structure is identified as 6H-type. The formation mechanism is revealed by comparative studies on the different structures of TiC precipitated under different diamond deposition conditions in terms of deposition time, atmosphere and temperature. A large number of carbon vacancies in the interfacial precipitated TiC phase are verified through electron energy loss spectroscopy (EELS) quantification analysis. However, an ordered arrangement of these carbon vacancies occurs only when the interfacial stress is large enough to induce the precipitation of 6H-type TiC. The supplementary analysis by X-ray diffraction (XRD) further confirms that additional diffraction peaks presented in the XRD patterns are corresponding to the precipitation of 6H-type TiC. (C) 2016 Elsevier Inc. All rights reserved.
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Recommended Citation:
Li, X. J.,He, L. L.,Li, Y. S.,et al. Strain-induced Ordered Structure Of Titanium Carbide During Depositing Diamond On Ti Alloy Substrate[J]. Materials Characterization,2017,123:227-232.

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