Fracture toughness of materials. Progress report, October 1984-October 1985

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6460749

Burns, S J

The fracture toughness of partially stabilized zirconia has been measured, for specimens that are extremely metastable, to be approx.30MPa..sqrt pi... This is the largest fracture toughness of any known ceramic. The toughness is measured using a non-linear deformation analysis. Crack tip shielding in steels has been applied to warm pre-stressed specimens. The liquid N/sub 2/ toughness is elevated by about a factor of two. Thermodynamic cycles applied to partially stabilized zirconia have measured linear expansion coefficients at selected unaxial stress states. The hysteretic volume-temperature-stress surface has been determined, including two phase transformations.

• Research Organization: Rochester Univ., NY (USA). Dept. of Mechanical Engineering
• DOE Contract Number: FG02-84ER45051
• OSTI ID: 6460749
• Report Number(s): DOE/ER/45051-T2; ON: DE86004545
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CHALCOGENIDES
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
EXPANSION
FRACTURE PROPERTIES
LINE DEFECTS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
RESEARCH PROGRAMS
THERMAL EXPANSION
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES