Interaction between plasma-sprayed coatings and a titanium alloy substrate

1. In the deposition of a tungsten coating on a titanium substrate regions of chemical reaction are observed. In the deposition of an 80% Ni-20% Cr alloy coating by the plasma-spraying process adhesion is purely mechanical in character. 2. It has been established that the amount of tungsten in the zones of chemical reaction is a function of the spraying range.