TiB Cermet Hardface/Titanium Backface Functionally Gradient Materials (FGMs) for High Performance Ballistic Applications

A program is proposed to demonstrate fabrication of functionally gradient materials (FGMs) for advanced armor against small arms threats, through leverage of Cercom's existing technology database for fabrication of cermet TiB/Ti FGMs up to 150mm square. The program will advance state of the art technology for FGMs, with a fabrication method adaptable to high volume, low cost production, in contrast to other reported processes. The new program will investigate ballistic effects of varying levels of titanium metal content in cermet TiB/Ti FGMs, and evaluation through V50 testing against 800 grain fragment simulating and .50 caliber AP projectile threats. Three cermet TiB compositions will be used as hardface materials for the FGMs, with titanium contents of 5,10, and 15 percent. Modeling of residual stresses, performed by UES, Inc., wil be used to maximize hardface thickness. Fabrication method will be hot pressing, including a Cercom-developed, modified tape casting process to tailor intermediate layers. Tile size will be 150mm square, with scale up to 300mm square in an Option Task. Attachment of one FGM tile to a metallic base will be demonstrated. Recommendations for optimization of cermet TiB/Ti FGMs will be made in a Phase II program plan.