Internal Boundaries Grain Boundaries: (i) Special; (ii) General Domain Boundaries (category of special grain boundaries)

symmetric tilt boundary

sinb b

D

Chiang, Bernie, and Kingery, “Physical Ceramics: Principles for Ceramic Science & Engineering” Wiley 1997

Allen and Thomas “The Structure of Materials” Wiley 1999.

asymmetric tilt boundary

Chiang, Bernie, and Kingery, “Physical Ceramics: Principles for Ceramic Science & Engineering” Wiley 1997

Allen and Thomas “The Structure of Materials” Wiley 1999.

Allen and Thomas “The Structure of Materials” Wiley 1999.

twist boundary

Chiang, Bernie, and Kingery, “Physical Ceramics: Principles for Ceramic Science & Engineering” Wiley 1997

screw dislocationout of the plane

screw dislocationin the plane