NDLI: Wear Behavior of (TiB$_{2}$–TiC)–Ni/TiAl/Ti Gradient Materials Prepared by the FAPAS Process

Content Provider	Springer Nature Link
Author	Hu, Lifang Chen, Shaoping Xue, Pengfei Jiang, Zhengyi Meng, Qingsen
Copyright Year	2012
Abstract	(TiB$_{2}$–TiC)–Ni/TiAl/Ti functionally gradient materials were prepared by field-activated pressure-assisted synthesis processes. (TiB$_{2}$–TiC)–Ni composite ceramic, the top layer of the functional gradient materials, was prepared in situ by the combustion synthesis process using Ti and B$_{4}$C powders as raw materials. Scanning electron microscope (SEM) images of the ceramic layer revealed that the TiB$_{2}$ and TiC particles in the composite were fine and homogeneously dispersed in the Ni matrix. The friction and wear properties of the (TiB$_{2}$–TiC)–Ni ceramic were evaluated by sliding against a GCr15 disk at temperatures from ambient up to 400 °C. The experimental results showed that the friction coefficient of the (TiB$_{2}$–TiC)–Ni ceramic decreased with the increasing testing temperature, load, and sliding speed. However, the loss rate decreased at higher temperature and increased at higher load and higher sliding speed. The wear mechanisms of (TiB$_{2}$–TiC)–Ni ceramic mainly depend upon thermal oxidation at higher temperature, load, and sliding speed. The worn topography and phase component of the worn surfaces were analyzed using SEM, energy dispersive spectroscopy, and X-ray diffraction. The oxide films of Fe$_{2}$O$_{3}$, TiO$_{2}$, and B$_{2}$O$_{3}$ formed during the friction process play an important role in lubrication, which results in a smaller friction coefficient.
Starting Page	313
Ending Page	322
Page Count	10
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	49
Issue Number	2
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2012-11-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Borides Carbides Friction mechanisms Self lubrication friction Ceramic composite 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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