Layered deposition for reactive joining of composites

A method comprising:

• applying layers of a first constituent and a second constituent on a surface of a ceramic matrix composite component to form a first outer coating, the first outer coating including the first constituent;
• applying layers of the first constituent and the second constituent on a component surface of a gas turbine engine component to form a second outer coating, the second outer coating including the second constituent, wherein the first constituent and the second constituent are capable of producing a thermodynamic non-equilibrium condition between the first constituent and the second constituent;
• forming a component assembly with the ceramic matrix composite component coupled to the gas turbine engine component and with the first outer coating of the ceramic matrix composite component in contact with the second outer coating of the gas turbine engine component;
• adding an energy to facilitate an equilibrium reaction between the first constituent of the first outer coating and the second constituent of the second outer coating;
• as a result of the adding the energy, forming a bond structure in the component assembly with a product of the equilibrium reaction, the bond structure affixing the ceramic matrix composite component to the gas turbine engine component, wherein the bond structure defines a level of porosity;
• and
• applying a melt infiltrant to the bond structure to at least partially reduce the level of porosity in the bond structure.