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In Situ Synthesis and Properties of Ti 3 AlC 2 /TiB 2 Composites
Author(s) -
Li Chao,
Li Meishuan,
Zhou Yanchun,
Zhang Jie,
He Lingfeng
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.1551-2916.2007.01954.x
Subject(s) - materials science , flexural strength , composite material , graphite , compressive strength , phase (matter) , modulus , titanium , elastic modulus , metallurgy , chemistry , organic chemistry
In order to improve the mechanical properties of Ti 3 AlC 2 , near‐fully dense Ti 3 AlC 2 /TiB 2 composites were synthesized using Ti, Al, graphite, and B 4 C powders as the initial materials. Compared with monolithic Ti 3 AlC 2 , the composites exhibit a much higher strength (for the compressive strength, from initial 723 MPa to maximal 2205 MPa; for flexural strength, from initial 340 MPa to maximal 861 MPa), and the strengthening effect can be held at least up to 1100°C. Moreover, besides the enhancement of the elastic modulus and hardness of Ti 3 AlC 2 , the introduction of a TiB 2 phase makes a positive contribution to its electrical conductivity.