Crystallization of amorphous Fe{sub 82}P{sub 18}

Journal Article · Sat Apr 01 04:00:00 EST 2000 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-000-0102-6· OSTI ID:20050540

Wei, B; Kohler-Redlich, P; Lueck, R; Li, Y; Ruehle, M

Magnetothermal analysis (MTA), high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD) were employed to investigate the crystallization behavior of amorphous Fe{sub 82}P{sub 18}. Three transition stages with distinct microstructures were identified: lamellae of the supersaturated intermetallic compound Fe{sub 3}P with about 5-nm width and varying composition are the result of the first transition (stage 1); the growth of polygonal grains of about 100-nm size from the lamellae marks the second transition (stage 2); and in the final stage 3, grains of {alpha}-Fe are precipitated. The lamellar structure is formed by one-dimensional growth, as concluded from the Avrami exponent n, which was found to lie in the range 1.32 {le} n {le} 1.72. Analysis of the transformation kinetics from the characteristic isothermal transformation curves confirmed that the crystallization process depends very sensitively on the heat-treatment temperature.

• Research Organization: Tsinghua Univ., Beijing (CN)
• OSTI ID: 20050540
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 4 Vol. 31; ISSN MMTAEB; ISSN 1073-5623
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALLIZATION
HEAT TREATMENTS
IRON ALLOYS
KINETICS
MICROSCOPY
MICROSTRUCTURE
PHOSPHORUS ADDITIONS
X-RAY DIFFRACTION