In situ martensitic transformation in a ternary MgO-Y/sub 2/O/sub 3/-ZrO/sub 2/ alloy: II, transformation in tetragonal ZrO/sub 2/ precipitates

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1988.tb06391.x· OSTI ID:6238093

Lee, R R; Heuer, A H

The stress-induced martensitic transformation of t-ZrO/sub 2/ precipitates in a ternary MgO-Y/sub 2/O/sub 3/-ZrO/sub 2/ alloy has been studied in situ in the transmission electron microscope. The transformation occurs autocatalytically and takes place by piecewise growth of two twin-related m-ZrO/sub 2/ variants. Unloading causes retransformation of partially transformed precipitates, but this reverse (m ..-->.. t) transformation of fully transformed precipitates only occurs on heating. The martensitic transformation in this system is clearly thermoeleastic.

• Research Organization: Dept. of Materials Science and Engineering, Case Western Reserve Univ., Cleveland, OH (US); CPS, Inc., Cambridge, MA (US)
• OSTI ID: 6238093
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 71:8; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ALLOY SYSTEMS
ALLOYS
CARBON ADDITIONS
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELASTICITY
ELECTRON MICROSCOPY
IRON ALLOYS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MARTENSITE
MECHANICAL PROPERTIES
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PRECIPITATION
SEPARATION PROCESSES
TENSILE PROPERTIES
TERNARY ALLOY SYSTEMS
TETRAGONAL LATTICES
THERMOELASTICITY
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES