Affiliation:
1. Beijing Jiaotong University
Abstract
The current-carrying wear characteristics of Ti3AlC2 sliding against low-carbon steel were
investigated. Tests were carried out using a block-on-disk type friction tester, with sliding speeds of
20~60 m/s, normal pressures range in 0.4~ 0.8 MPa, and the current intensity of 0 A, 50 A and 100 A.
The Ti3AlC2 showed good current-carrying wear properties. At the sliding speed of 20 m/s, the wear
rate of the Ti3AlC2 (× 10-6 mm3/Nm) was varied in the range of (2.05 ~ 2.41), (2.64 ~ 2.39) and (6.26
~ 3.62), under the current of 0 A, 50 A and 100 A, respectively. Both the surfaces of Ti3AlC2 and the
steel were covered by a frictional film, which was consisted of iron titanate (Fe2.25Ti0.75O4) and
aluminum iron oxide (AlFeO3). The wear rate of Ti3AlC2 with current was composed of two parts: the
interaction of micro-arc ablation and mechanical friction, and the coupled action of thermal and
mechanical effect. Which one will be the main mechanism depends on the material parameters of
Ti3AlC2 and the mechanical parameters such as the normal pressure or the sliding speed.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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