Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Scanning electron micrographs of the wear test specimens showing the morphology the worn out surfaces after the friction and wear test at different loads. (a) ABS at 5 N; (b) ABS at 20 N; (c) ABS + 5 wt% graphite at 5 N; (d) ABS + 5 wt% graphite 20 N.
