NIMTE OpenIR  > 2018专题
Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents
Liu, Jingzhou; Zuo, Xiao; Wang, Zhenyu; Wang, Li; Wu, Xiaochun; Ke, Peiling; Wang, Aiying
2018
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
Volume753Pages:43421
AbstractThe effect of Al content on phase structure and mechanical properties of vacuum annealed Cr-Al-C coatings was investigated. Cr-Al-C coatings were deposited by co-sputtering of Cr2Al and Al targets in optimized CH4/Ar atmosphere. The atomic content of Al was adjusted through the control of Al target current from 0.5 A to 3.0 A, thus Cr-Al-C coatings with different stoichiometric ratios were obtained. After 1.5 h thermal annealing at 750 degrees C in vacuum, Cr2AlC MAX phase was observed from the XRD measurements. The Rietveld refinement of XRD spectra results indicated that the annealed coatings were composed of Cr2AlC, Al8Cr5 and Cr7C3 phases with different amounts. With the increase of Al content, the hardness and modulus of the Cr2AlC MAX phase coatings varied from 10.17 to 19.00 GPa and 198.43 to 267.62 GPa, respectively, while the toughness suffered an obvious decline. HRTEM analysis demonstrated that the excess of Al content resulted in the formation of Al8Cr5 and Al segregation at grain boundaries, which led to the deterioration of mechanical properties. (C) 2018 Elsevier B.V. All rights reserved.
Keywordm(n+1)Ax(n) Phases Max Phases Behavior Oxidation Deposition Ceramics Microstructure Deformation Powders Ti2alc
Subject AreaChemistry
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/17313
Collection2018专题
Recommended Citation
GB/T 7714
Liu, Jingzhou,Zuo, Xiao,Wang, Zhenyu,et al. Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,753:43421.
APA Liu, Jingzhou.,Zuo, Xiao.,Wang, Zhenyu.,Wang, Li.,Wu, Xiaochun.,...&Wang, Aiying.(2018).Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents.JOURNAL OF ALLOYS AND COMPOUNDS,753,43421.
MLA Liu, Jingzhou,et al."Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents".JOURNAL OF ALLOYS AND COMPOUNDS 753(2018):43421.
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