Figure 4.
SEM images of cross-sections of (a) 0-10, (b) 20-10, (c) 30-10, and (d) 240-0 specimens, showing (i) top, (ii) center, and (iii) bottom sections (Secondary electron detector, high vacuum mode, accelerated voltage 5 kV).
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.