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Densification and characterization of rapid carbothermal synthesized boron carbide
Author(s) -
Toksoy Muhammet Fatih,
Rafaniello William,
Xie Kelvin Yu,
Ma Luoning,
Hemker Kevin Jude,
Haber Richard Alan
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12654
Subject(s) - materials science , boron carbide , dwell time , spark plasma sintering , sintering , carbothermic reaction , stoichiometry , carbide , indentation hardness , particle size , niobium carbide , metallurgy , grain size , carbon fibers , chemical engineering , composite material , microstructure , composite number , engineering , medicine , clinical psychology , chemistry , organic chemistry
Submicrometer boron carbide powders were synthesized using rapid carbothermal reduction (RCR) method. Synthesized boron carbide powders had smaller particle size, lower free carbon, and high density of twins compared to commercial samples. Powders were sintered using spark plasma sintering at different temperatures and dwell times to compare sintering behavior. Synthesized boron carbide powders reached >99% TD at lower temperature and shorter dwell times compared to commercial powders. Improved microhardness observed in the densified RCR samples was likely caused by the combination of higher purity, better stoichiometry control, finer grain size, and a higher density of twin boundaries.