NDLI: Interface Structure and Wear Behavior of Cr26 Ferrous Matrix Surface Composites Reinforced with CTC$

Content Provider	Springer Nature Link
Author	Zheng, Kaihong Gao, Yimin Tang, Shuli Li, Yefei Ma, Shengqiang Yi, Dawei Zhang, Zhiyun
Copyright Year	2014
Abstract	Using cast tungsten carbide particles (CTC$_{P}$) and reduced iron powders as raw materials, the porous ceramic preforms with honeycomb, strip, and layer structure, respectively, were prepared by loose sintering process; then, the CTC$_{P}$/Cr26 ferrous matrix composites were fabricated by casting infiltration process. The microstructure of the composites was analyzed by SEM, XRD, and EDS. The results show that a sintered shell forms as a result of the reaction of Fe and W$_{2}$C in the CTC$_{P}$ during loose sintering process; the inner part of the shell around the CTC$_{p}$ consists of WC and Fe$_{3}$W$_{3}$C phases, while the outer part between the particles is dominated by Fe$_{3}$W$_{3}$C. Therefore, the strength of preforms is enhanced because the particles are connected with each other by sintered shell. During casting infiltration process, a transition layer constituted by WC and Fe$_{3}$W$_{3}$C formed at the interface of CTC$_{p}$ and the matrix due to the dissolution and precipitation of the sintered shell in the high-temperature liquid iron. The three-body abrasive wear behavior of the composites was investigated. The result shows the wear resistance of honeycomb structure composite is comparable to that of whole layer (WL) structure composite, which is three times of heat-treated Cr26. However, the honeycomb structure composite has higher performance/cost ratio owing to the lower CTC$_{p}$ volume fraction and higher strength and toughness compared with the WL structure composite.
Starting Page	15
Ending Page	23
Page Count	9
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	54
Issue Number	1
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2014-02-13
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Composite Cast tungsten carbide particles Wear behavior Casting infiltration process Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Theoretical and Applied Mechanics Physical Chemistry Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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