Thermal spray slurry, thermal spray coating and method for forming thermal spray coating

A thermal spray slurry prep material used for preparing a thermal spray slurry, wherein

• the thermal spray slurry comprises, as components, a dispersion medium and thermal spray particles formed of at least one species of material selected from the group consisting of a ceramic, a cermet and a metal;
• 800 mL of the thermal spray slurry contains A kg of the thermal spray particles;
• when 800 mL of the thermal spray slurry in which the thermal spray particles are dispersed is supplied at a flow rate of 35 mL/min to a horizontally-placed tube and collected, the collected slurry contains B kg of the thermal spray particles,
• the slurry has a supply efficiency index If of 70% or higher, determined by the next equation If (%)=B/A×100;
• and
• the slurry prep material comprises at least one component of the thermal spray slurry.