Surface energy driven crystallization of amorphous Ni{sub 69}Cr{sub 14}P{sub 17} alloy

Conference · Tue Nov 01 00:00:00 EST 1994

OSTI ID:10117040

Schumacher, G ^[1]; Wanderka, N; Wahi, R P ^[2]

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1. Argonne National Lab., IL (United States)
2. Hahn-Meitner-Institut Berlin (Germany)

Amorphous Ni{sub 69}Cr{sub l4}P{sub l7} specimens thinned for transmission electron microscopy have been studied in situ during thermal treatment. In the thinnest regions of the specimens (thickness d < 50 nm), a metastable hexagonal (Ni,Cr){sub 3}P phase nucleates at the perforation edge with the c-axis perpendicular to the specimen surface. The crystal width of this phase grows linearly with time. Above 530{degrees}C the hexagonal phase transforms into a stable b.c.t. (Ni,Cr){sub 3}P phase. It is concluded that the surface and grain boundary energies dominate nucleation and growth.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10117040
• Report Number(s): ANL/MSD/CP-83327; CONF-941144-55; ON: DE95005543; TRN: 95:001717
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS),Boston, MA (United States),28 Nov - 9 Dec 1994; Other Information: PBD: Nov 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL BASE ALLOYS
CRYSTALLIZATION
CRYSTAL-PHASE TRANSFORMATIONS
ENERGY DENSITY
CHROMIUM ALLOYS
PHOSPHORUS COMPOUNDS
PERFORATION
SURFACE ENERGY
TRANSMISSION ELECTRON MICROSCOPY
NUCLEATION
GRAIN BOUNDARIES
ELECTRON DIFFRACTION
HEAT TREATMENTS
INTERFACES
DENDRITES
FREE ENTHALPY
360102
360104
STRUCTURE AND PHASE STUDIES
PHYSICAL PROPERTIES