Karpenko N. Regularities in multiphase eutectic crystallization of boron- and phosphorous-containing iron alloys

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0411U006159

Thesis Registration Form

0411U006159.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

20-10-2011

Specialized Academic Board

Д 08.051.02

Oles Honchar Dnipro National University

Essay

The Fe-P-В, Fe-P-Мо, Fe-С-Мо, and Fe-P-В-Мо alloys have been investigated. The alloying with phosphorous and boron has been shown to increase components mutual solubility as a result of substitutional-and-interstitial solid solutions formation. The Fe-Fe, Fe-P, and Fe-B atomic bondings length of Fe3P1-хBх solid solutions has been calculated. The peculiarities in univariant binary and ternary eutectics crystallization have been established. The main mechanisms of ternary euitectics crystallization have been suggested as follows: divorced crystallization; simultaneous cooperative three-phase growth; ternary eutectics growth as binary eutectics with the third phase inclusions; and liquid separation into two binary eutectics that grow simultaneously. The properties of the following primary phases have investigated: ferrite alloyed with phosphorous and boron, Fe3(P,B), Fe2(P,B), Fe3(В,Р), Fe2(В,Р), and Fe5PB2.

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