New MAX‐Phase Compounds in the V–Cr–Al–C System
Yanchun Zhou*Member, The American Ceramic SocietyFanling MengGraduate School of Chinese Academy of Sciences, Beijing 100039, ChinaJie ZhangGraduate School of Chinese Academy of Sciences, Beijing 100039, China
2008en
ABI
Abstract
New layered compounds, (V 0.5 Cr 0.5 ) 3 AlC 2 , (V 0.5 Cr 0.5 ) 4 AlC 3 , and (V 0.5 Cr 0.5 ) 5 Al 2 C 3 were synthesized by reactive hot pressing V, Cr, Al, and graphite powders. The crystal structures of these new phases were determined using a combination of X‐ray diffraction and scanning transmission electron microscopy. (V 0.5 Cr 0.5 ) 3 AlC 2 is isotypical to Ti 3 AlC 2 ; while (V 0.5 Cr 0.5 ) 4 AlC 3 has the Ti 4 AlN 3 or α‐Ta 4 AlC 3 ‐type crystal structure. (V 0.5 Cr 0.5 ) 5 Al 2 C 3 is formed by periodically stacking of half‐unit cells of (V 0.5 Cr 0.5 ) 2 AlC and (V 0.5 Cr 0.5 ) 3 AlC 2 .
Identifiers
Citations and references
Cited by 20 references