Study on low velocity cyclic impact wear of amorphous carbon films with different mechanical properties

The reproducible wear characterization methods were used to evaluate and analyze the cyclic dynamic loads damage and sliding wear process of the amorphous carbon films. The films with different properties (a-C, a-C:H and a-C: H/WC) on copper substrate (H62) were tested. The wear rates of the three d...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2020-11, Vol.402, p.126339, Article 126339
Main Authors: Li, Qinglin, Shi, Shaomiao, Li, Xia, Ding, Shiyan, Fan, Chenglong, Zhang, Guangan
Format: Article
Language:English
Subjects:
Amorphous carbon film
Carbon
Chipping
Crack propagation
Cyclic loads
Dynamic loads
Dynamic response
Fatigue cracking
Fatigue failure
Fatigue tests
Fracture mechanics
Fracture mechanisms
Fracture toughness
Frictional wear
Impact damage
Impact resistance
Impact tests
Impact wear
Impact wear resistance
Interlayers
Low velocity cyclic impact wear
Mechanical properties
Sliding friction
Spalling
Substrates
Tribology
Wear rate
Wear resistance
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The reproducible wear characterization methods were used to evaluate and analyze the cyclic dynamic loads damage and sliding wear process of the amorphous carbon films. The films with different properties (a-C, a-C:H and a-C: H/WC) on copper substrate (H62) were tested. The wear rates of the three different films have the same order of magnitude under sliding friction test. However, the films failure degrees were quite different in low velocity impact tests based on energy control. It is necessary to select the appropriate film for a given tribological application. The test results show: the a-C: H film has better impact wear resistance, while the damage of a-C:H/WC film is the worst due to the existence of WC interlayer. In the impact test, it was found that the fracture toughness of the a-C:H/WC film was inversely correlation to the H3/E2 and H/E ratio. Test results indicated that the film failure behavior includes fatigue cracking, chipping, and spalling. In addition, soft film is more durable than hard film under impact fatigue load. •The films failure degrees are different in low velocity impact tests though the wear rates are close under sliding friction.•The impact tests can obtain the dynamic response based on kinetic energy Ei in the impact process.•The fracture toughness of the a-C:H/WC film was inversely correlation to the H3/E2 and H/E ratio.•The soft film is more durable than hard film under impact fatigue load.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2020.126339