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Pulsed Laser Melting of Metallic Glasses

Published online by Cambridge University Press:  15 February 2011

Animesh K. Jain ,
D.K. Sood ,
G. Battaglin ,
A. Carnera ,
G. Della Mea ,
V.N. Kulkarni ,
P. Mazzoldi  and
R.V. Nandedkar
Animesh K. Jain
Affiliation:
Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay-400 085, India
D.K. Sood
Affiliation:
Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay-400 085, India
G. Battaglin
Affiliation:
Unita GNSM-CNR, Instituto di Fisica, Universita di Padova, 35100 Padova, Italy
A. Carnera
Affiliation:
Unita GNSM-CNR, Instituto di Fisica, Universita di Padova, 35100 Padova, Italy
G. Della Mea
Affiliation:
Unita GNSM-CNR, Instituto di Fisica, Universita di Padova, 35100 Padova, Italy
V.N. Kulkarni
Affiliation:
Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay-400 085, India
P. Mazzoldi
Affiliation:
Unita GNSM-CNR, Instituto di Fisica, Universita di Padova, 35100 Padova, Italy
R.V. Nandedkar
Affiliation:
Materials Science Laboratory, Reactor Research Centre, Kalpakkam-603 102, India
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Abstract

We have studied pulsed ruby laser melting of metallic glasses – Fe40Ni40P14B6 and Fe40Ni40B20. Both amorphous and crystallised samples were used, and some of them were implanted with Ru to serve as a marker species. SEM measurements on surface topography and RBS (1.8 MeV He+) depth profiling of Ru marker redistribution were used to establish melting above about 1 J/cm2. Heat flow calculations and liquid phase diffusion analysis of the Ru marker species under a moving melt front have been performed. The observed redistribution of Ru upto 2.5 J/cm2 is consistent with an effective D ∼ 5 × 10−5 cm2 s−1. The flat Ru depth profiles at higher energy densities are shown to arise from convection effects. Results on crystallised and amorphous samples are similar. Preliminary TEM measurements of quenched regions on a crystallised sample show an unexpected absence of amorphous phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 13 , 1982 , 703
Copyright
Copyright © Materials Research Society 1983

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References

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