ABSTRACT
Functionally graded materials (FGMs) are emergent materials fabricated for specific applications due to their unique characteristics and flexibility. The aim is to build a material that can withstand specific conditions on one side and have improved properties on the other side by continuously tailoring the material composition at the micron level. At present, these materials are at the forefront of material science. In the past two decades, several techniques for the development of FGMs have been proposed and practically exercised. Initially, a few methodologies were used to achieve the transition of composition and structure, i.e. liquid state processing, solid state processing, and deposition processing. Out of those, liquid state manufacturing is gaining high recognition for producing good-quality FGMs. This article presents a comprehensive description of some of the most famous liquid state methods for producing FGMs.
