Dissolving metal supports in 3d printed metals and ceramics using sensitization

A method of fabricating a metal or ceramic component using 3D printing, the method comprising:

• creating a 3D printed piece constructed of a first metal or ceramic material and including a body of the component coupled to one or more support structures;
• applying a sensitization agent to surfaces of the 3D printed piece, wherein the sensitization agent alters a chemical composition of the first metal or ceramic material into a second metal or ceramic material at the surfaces of the 3D printed piece where the sensitization agent was applied such that, after reacting with the sensitization agent, the first metal or ceramic material of the metal or ceramic piece is at least partially covered by the second metal or ceramic material;
• and
• separating the body of the component from the one or more support structures by applying a chemical or electrochemical dissolution process that dissolves the second metal or ceramic material without significantly affecting the first metal or ceramic material.