On Prediction of Amorphous Phase Forming Compositions in the Iron-Rich Fe-Zr-B Ternary System and Their Synthesis |
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| Authors: | B Ramakrishna Rao A K Shah M Srinivas J Bhatt A S Gandhi B S Murty |
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| Affiliation: | (1) Naval Materials Research Laboratory, Ambernath, Thane, 421506, India;(2) Panipat Institute of Engineering and Technology, Panipat, Haryana, PIN - 132102, India;(3) Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad, 500058, India;(4) Department of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology, Nagpur, 440010, India;(5) Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India;; |
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| Abstract: | A thermodynamic model parameter P
H-S
, which is a product of enthalpy of chemical mixing and mismatch entropy normalized by Boltzmann’s constant, was used as a
guiding tool to predict amorphous phase forming compositions in Fe-rich alloys of the Fe-Zr-B system. Attempts were made to
evaluate the effect of Zr addition on the P
H-S
parameter and phase formation by mechanical alloying (MA) and rapid solidification processing (RSP). A systematic evaluation
of the P
H-S
parameter of various binary compounds in the Fe-Zr-B system and ternary alloys indicated ~–7 kJ/mol as a lower bound for
the formation of amorphous phase. Model predictions were verified with phase formation in two random compositions in the Fe-rich
end of the Fe-Zr-B system synthesized by MA and RSP. |
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