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Effect of Composition on Properties of Alumina/Titanium Silicon Carbide Composites
Author(s) -
Luo Yong Ming,
Li Shu Qin,
Chen Jian,
Wang Rui Gang,
Li Jian Qiang,
Pan Wei
Publication year - 2002
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.1151-2916.2002.tb00589.x
Subject(s) - materials science , composite material , fracture toughness , spark plasma sintering , silicon carbide , vickers hardness test , sintering , titanium carbide , percolation threshold , titanium , ceramic , phase (matter) , flexural strength , carbide , electrical resistivity and conductivity , microstructure , metallurgy , electrical engineering , chemistry , engineering , organic chemistry
In the present study, the room‐temperature properties of Al 2 O 3 ‐Ti 3 SiC 2 composites with different Ti 3 SiC 2 contents are determined. The composites are prepared by attrition milling Al 2 O 3 and Ti 3 SiC 2 mixture powders followed by spark plasma sintering (SPS) under vacuum. From a closer examination of the dependencies of the electrical conductivity on compositions in this system, we determined the percolation threshold at which an interconnected network of electrically conductive phase arises. Since the hardness of Ti 3 SiC 2 is lower than that of Al 2 O 3 , the Vickers hardness decreased with the increasing of Ti 3 SiC 2 content while the fracture toughness and the strength increased. The maximum strength (673 MPa) and the maximum toughness (9.3 MPa·m 1/2 ) were reached in the pure Ti 3 SiC 2 material.