Premium
Densification and Crystallization in Fe–Based Bulk Amorphous Alloy Spark Plasma Sintered in the Supercooled Liquid Region
Author(s) -
Paul Tanaji,
Singh Ashish,
Harimkar Sandip P.
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201700224
Subject(s) - materials science , supercooling , spark plasma sintering , sintering , crystallization , amorphous solid , alloy , atmospheric temperature range , amorphous metal , metallurgy , composite material , thermodynamics , crystallography , chemistry , physics
Spark plasma sintering of Fe 48 Cr 15 Mo 14 Y 2 C 15 B 6 bulk amorphous alloy at a range of temperatures in the supercooled liquid region (SLR) and above yielded near fully dense compacts. Upon sintering in the temperature range of 570–630 °C in SLR, large increments in density are observed due to enhanced sintering resulting from drastic reduction in the viscosity of the alloy. Above 630 °C, the absence of sufficient driving force for sintering and stiffening of the amorphous matrix from partial crystallization leads to sluggish densification. Analysis of the temperature profile in the sample and the die reveals that the temperature at the center of the sample is higher than that at the inner wall of the die as recorded by the thermocouple and the difference between the two is estimated to be between 31 and 53 °C.