Nickel-niobium alloys obtained by picosecond pulsed laser quenching

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(86)90024-6· OSTI ID:6911554

Lin, C J; Spaepen, F

Ni/sub x/Nb/sub 100-x/ alloys were quenched from the melt by irradiation with a 30 ps Nd:YAG laser pulse with a fluence of about 1 J cm/sup -2/. The crystalline starting materials were multilayered films prepared by d.c. sputtering from alternating elemental targets. For average compositions 40 less than or equal to chi less than or equal to 79, the as-deposited films were amorphous and showed the X-ray peak corresponding to the composition modulation. For other compositions, the as-deposited films were microcrystalline. The laser-quenched alloys in the range 23 less than or equal to chi less than or equal to 82 were amorphous. This range exceeds that in which amorphous alloys have been prepared by other melt quenching techniques or by sputtering. Laser quenching resulted in glass formation even below the T/sub 0/ line and at intermetallic compound compositions. In the range 0 less than or equal to chi less than or equal to 18, homogeneous supersaturated b.c.c. solutions were formed. In the range 89 less than or equal to chi less than or equal to 100, homogeneous supersaturated f.c.c. solutions containing twins and stacking faults were formed.

• Research Organization: IBM Research Lab., 5600 Cottle Road, San Jose, CA (US)
• OSTI ID: 6911554
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 34:7; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
BCC LATTICES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DEPOSITION
ELECTROMAGNETIC RADIATION
FABRICATION
FCC LATTICES
FILMS
LASER RADIATION
LASERS
NEODYMIUM LASERS
NICKEL ALLOYS
NIOBIUM ALLOYS
QUENCHING
RADIATIONS
SOLID STATE LASERS
SPUTTERING
STACKING FAULTS
STRUCTURAL CHEMICAL ANALYSIS