Microstructure and Tribological Properties of Laser Clad gamma/Cr7C3/Tic Composite Coatings on gamma-TiA1 Intermetallic Alloy

doi:10.1016/j.wear.2006.06.012

IMECH-IR > 力学所知识产出(1956-2008)

	Microstructure and Tribological Properties of Laser Clad gamma/Cr7C3/Tic Composite Coatings on gamma-TiA1 Intermetallic Alloy
	Liu XB(刘秀波); Wang HM; Liu, XB (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
Source Publication	Wear
	2007
Volume	262 Issue:5-6 Pages:514-521
ISSN	0043-1648
Abstract	In order to improve the wear resistance of the gamma-TiAl intermetallic alloy, microstructure, room- and high-temperature (600 degrees C) wear behaviors of laser clad gamma/Cr7C3/TiC composite coatings with different constitution of NiCr-Cr3C2 precursor-mixed powders have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectrometer (EDS), block-on-ring (room-temperature) and pin-on-disk (high-temperature) wear tests. The responding wear mechanisms are discussed in detail. Results show that microstructures of the laser clad composite coatings have non-equilibrium solidified microstructures consisting of primary hard Cr7C3 and TiC carbides and the inter-primary gamma/Cr7C3 eutectic matrix, about three to five times higher average microhardness compared with the TiAl alloy substrate. Higher wear resistance than the original TiAl alloy is achieved in the clad composite coatings under dry sliding wear conditions, which is closely related to the formation of non-equilibrium solidified reinforced Cr7C3 and TiC carbides and the positive contribution of the relatively ductile and tough gamma/Cr7C3 eutectics matrix and their stability under high-temperature exposure.
Subject Area	力学
DOI	10.1016/j.wear.2006.06.012
Indexed By	SCI
Language	英语
WOS ID	WOS:000244411000003
WOS Research Area	Engineering ; Materials Science
WOS Subject	Engineering, Mechanical ; Materials Science, Multidisciplinary
Citation statistics	Cited Times:31[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://dspace.imech.ac.cn/handle/311007/16932
Collection	力学所知识产出(1956-2008)
Corresponding Author	Liu, XB (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
Recommended Citation GB/T 7714	Liu XB,Wang HM,Liu, XB . Microstructure and Tribological Properties of Laser Clad gamma/Cr7C3/Tic Composite Coatings on gamma-TiA1 Intermetallic Alloy[J]. Wear,2007,262,5-6,:514-521.
APA	刘秀波,Wang HM,&Liu, XB .(2007).Microstructure and Tribological Properties of Laser Clad gamma/Cr7C3/Tic Composite Coatings on gamma-TiA1 Intermetallic Alloy.Wear,262(5-6),514-521.
MLA	刘秀波,et al."Microstructure and Tribological Properties of Laser Clad gamma/Cr7C3/Tic Composite Coatings on gamma-TiA1 Intermetallic Alloy".Wear 262.5-6(2007):514-521.

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