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Pulse Electric Current–Aided Reactive Sintering of High‐Purity Zr 3 Al 3 C 5
Author(s) -
Zhou Jie,
Qiu Fagui,
Shen Lu,
Li Fangzhi,
Xue Jianming,
Barsoum Michel W.,
Huang Qing
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12766
Subject(s) - sintering , materials science , analytical chemistry (journal) , ternary operation , microstructure , scanning electron microscope , phase (matter) , nuclear chemistry , chemistry , metallurgy , composite material , chromatography , computer science , programming language , organic chemistry
Herein, we report on the in situ reactive synthesis and simultaneous densification of a high‐purity ternary Zr 3 Al 3 C 5 phase via pulse electric current sintering ( PECS ) of Zr / Al /graphite powder mixtures with a molar ratio of 3:3.2:4.8. The phases and microstructure evolution in the 580°C–1800°C temperature range were characterized by X ‐ray diffraction, real‐time sintering curves, and a scanning electron microscope equipped with an energy dispersive spectroscope. An additive‐free, fully dense Zr 3 Al 3 C 5 compound was obtained at 1800°C using a load corresponding to a stress of 35 MPa for 20 min. The final product was comprised of 96.61 wt% Zr 3 Al 3 C 5 , 3.14 wt% ZrC , and 0.25 wt% Zr 2 Al 3 C 4 ; the relative density was 97%.