Synthesis and Microstructural Characterization of Substoichiometric Ti2Al(CxNy) Solid Solutions and Related Ti2AlCx and Ti2AlN End‐Members. Issue 7 (2nd April 2014)

• Record Type: Journal Article
• Authors: Yu, Wenbo; Gauthier‐Brunet, Véronique; Cabioc'h, Thierry; Dubois, Sylvain; Vanderah, T.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 7(2014)
• Page Start: 2308
• Page End: 2313
• Publication Date: 2014-04-02
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12930
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12930-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Ti, TiC, Al and AlN powders were mixed to synthesize Ti₂Al(C_{<italic>x</italic>}N_{<italic>y</italic>}) (<italic>x</italic> + <italic>y</italic> &lt; 1) solid solutions, Ti₂AlC_{<italic>x</italic>} (<italic>x</italic> &lt; 1) and Ti₂AlN‐related end‐members by hot isostatic pressing at 1400°C/80 MPa for 4 h. For the pure carbides, it is demonstrated that single‐phased samples can only be obtained when about 15% of substoichiometry on the carbon site is applied. Such a result likely implies that Ti₂AlC_{<italic>x</italic>} can only exist in a narrow range of carbon composition. Ti₂AlN nitride can be synthesized with <italic>y</italic> = 1. Assuming that vacancy content varies linearly from 0 to 0.15 going from Ti₂AlN to Ti₂AlC_0.85 in the solid solutions, element concentrations have been calculated to synthesize different solid solutions. Thus, it is demonstrated that single‐phased and fully dense Ti₂Al(C_0.23N_0.71), Ti₂Al(C_0.45N_0.45), and Ti₂Al(C_0.66N_0.22) carbonitrides can be synthesized.</p> </abstract>