SHS Extrusion of Materials Based on the Ti-Al-C MAX Phase

摘要

MAX phases are of great practical interest for the last decade. A MAX phase is an M_(n+1)AX_n ternary system with hexagonal close packing, where M is a transition metal, A is a subgroup A element, and X is carbon or nitrogen. These materials are intermediate in their properties between metals and ceramics [1, 2]. The main method for producing such materials is sintering [3], which consumes much time and energy and requires a large number of powder metallurgy procedures: compaction, vacuum sintering or hot pressing, plasticizer annealing, etc. An alternative to sintering is self-propagating high-temperature synthesis (SHS) [4], which consumes much less energy and simplifies ceramics production. It was shown [5,6] that SHS can be used for producing materials based on MAX phases without titanium carbide (an undesirable impurity).