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Preparation and Properties of Ternary Ti 3 AlC 2 and its Composites from Ti–Al–C Powder Mixtures With Ceramic Particulates
Author(s) -
Peng L. M.
Publication year - 2007
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.1551-2916.2007.01517.x
Subject(s) - materials science , ceramic , composite material , flexural strength , fracture toughness , titanium carbide , ternary operation , hot pressing , cubic zirconia , crystallite , titanium , carbide , electrical resistivity and conductivity , max phases , metallurgy , computer science , electrical engineering , programming language , engineering
A layered ternary carbide phase, Ti 3 AlC 2 , was synthesized by hot pressing from the starting materials of Ti, aluminum, and activated carbon at 1400°C for 2 h. Its composites were also fabricated through addition of micro‐sized SiC and partially stabilized zirconia particulates to the pulverized Ti 3 AlC 2 powders. The polycrystalline Ti 3 AlC 2 ceramic obtained has a flexural strength of 172 MPa and a fracture toughness of 4.6 MPa·m 1/2 , respectively. This compound is relatively soft (Vikers hardness of 2.7 GPa) and exhibits good electrical conductivity with an electrical resistivity of 8.2 μΩ·m. Both the Ti 3 AlC 2 /SiC and Ti 3 AlC 2 /ZrO 2 composites are superior to the monolithic Ti 3 AlC 2 ceramic in strength, fracture toughness, and micro‐hardness.