A new method to texture dense M(n+1)AX(n) ceramics by spark plasma deformation

作者：Lapauw T^*; Vanmeensel K; Lambrinou K; Vleugels J

来源：Scripta Materialia, 2016, 111: 98-101.

DOI：10.1016/j.scriptamat.2015.08.023

• MAX phase
• Deformation behaviour
• Spark plasma sintering
• Textured ceramics

This work explored a new method to texture M(n+1)AX(n) phases by deforming discs of dense ceramics Maxthal 211 (R) (nominally Ti2AlC) and Maxthal 312 (R) (nominally Ti3SiC2) in a spark plasma facility. The disc diameter increased by 40% without crack formation. After deformation, the MAX grains exhibited clear preferential crystallographic orientation, whereby the c-axis was aligned to the compression direction. The fracture toughness increased both parallel and perpendicular to the textured top surface compared with the as-sintered materials. The onset of plastic deformation was observed near the brittle-to-plastic transformation temperature, a fact that could be associated with the change in elastic response.

• 出版日期2016-1-15