Ceramics Division Characterization of Fracture Origins

$characterization of fracture$

Origin Identity and Catalog

The first attribute of a fracture origin is its identity. The characterization shall be by a phenomenological approach which identifies what the flaw is and not how it appears under a particular mode of viewing.


             Use:   the origin is a pore.
      Do not use:   the origin is a white spot.

Fracture origins and their definitions are listed below. Click on one of the column headings in the table below to see photos of typical origins.

Inherently Volume-Distributed Origins	Inherently Surface-Distributed Origins	Miscellaneous/Mixed
•Pore •Porous Seam •Porous Region •Agglomerate •Inclusion •Compositional Inhomogeneity •Large Grain(s) •Crack	•Machining Damage •Handling Damage •Pit •Surface Void	•Unidentified •Other •Multiple Origins •Mixed •Uncertain •Not Examined

NIST is an agency of the
U.S. Commerce Department

Date created: 08 February 2001
Last updated: 05 September 2002

Technical inquiries:
Ceramics Division
NIST, 100 Bureau Drive, Stop 8520, Gaithersburg, MD 20899-8520.
Phone (301) 975-6119
Fax (301) 975-5334

Ceramics website comments:
Ceramics Webmaster

General NIST inquiries:
Public Inquiries Unit:
Phone (301) 975-NIST (6478)
TTY (301) 975-8295