Assessment of B4C reaction with liquid iron alloys

The degree of reaction achieved when B4C powders are brought into contact with liquid iron alloys has been assessed by a levitation dispersion test. Reaction occurs rapidly, leading to boron carbide dissolution and iron boride formation. In carbon-free iron alloys borocarbide, Fe23(C, B)6, also form...

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Bibliographic Details
Published in:Journal of materials science 1994-01, Vol.29 (2), p.464-467
Main Authors: TERRY, B. S, CHINYAMAKOBVU, O. S
Format: Article
Language:English
Subjects:
Applied sciences
Dispersion hardening metals
Exact sciences and technology
Metals. Metallurgy
Powder metallurgy. Composite materials
Production techniques
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Summary:The degree of reaction achieved when B4C powders are brought into contact with liquid iron alloys has been assessed by a levitation dispersion test. Reaction occurs rapidly, leading to boron carbide dissolution and iron boride formation. In carbon-free iron alloys borocarbide, Fe23(C, B)6, also forms and, in low-carbon iron alloys, free graphite was also formed. High-carbon alloys reacted to form both Fe3(C, B) and free graphite. Attempts to provide protection for the B4C by forming a TiC coating on its surface by in situ reactions with liquid Fe-Ti and Fe-Ti-C alloys proved unsuccessful, with TiC forming as a dispersed phase throughout the iron matrix. 6 refs.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF01162507