Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents

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	Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents
	Wang, Aiying; Zuo, Xiao; Liu, Jingzhou; Wang, Zhenyu; Wang, Li; Wu, Xiaochun; Ke, Peiling
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2018
卷号	753 页码:43421
关键词	m(n+1)Ax(n) Phases Max Phases Behavior Oxidation Deposition Ceramics Microstructure Deformation Powders Ti2alc
英文摘要	The 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.
学科主题	Chemistry
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17313]
专题	2018专题
推荐引用方式 GB/T 7714	Wang, Aiying,Zuo, Xiao,Liu, Jingzhou,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	Wang, Aiying.,Zuo, Xiao.,Liu, Jingzhou.,Wang, Zhenyu.,Wang, Li.,...&Ke, Peiling.(2018).Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents.JOURNAL OF ALLOYS AND COMPOUNDS,753,43421.
MLA	Wang, Aiying,et al."Fabrication and mechanical properties of high purity of Cr2AlC coatings by adjustable Al contents".JOURNAL OF ALLOYS AND COMPOUNDS 753(2018):43421.