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Reactive Hot Pressing of ZrB 2 –SiC–ZrC Composites at 1600°C
Author(s) -
Wu WenWen,
Zhang GuoJun,
Kan YanMei,
Wang PeiLing
Publication year - 2008
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/j.1551-2916.2008.02507.x
Subject(s) - sintering , materials science , porosity , relative density , ceramic , hot pressing , ball mill , raw material , composite material , impurity , metallurgy , chemistry , organic chemistry
A ZrB 2 –SiC–ZrC ceramic was produced by reactive hot pressing using Zr, Si, and B 4 C as raw materials. The kinetics of the reaction process was studied. The reduction of powders by ball milling is of crucial importance for the sintering. The self‐propagating high‐temperature synthesis reaction between the raw powders can be ignited by controlling the sintering conditions, which leads to a sintering temperature as low as 1600°C, the lowest sintering temperature reported thus far. The relative density is 97.3%, with an open porosity of 0.6%, and the mechanical properties are comparable to the composites that sintered at higher temperatures. The depletion of oxygen impurities during the sintering was discussed.