| 摘要 |
<p>A spray coating process and apparatus (14,16,20) suitable for depositing coatings on surfaces of components, and particularly surfaces that are difficult to access with conventional cold spraying equipment. The process and apparatus (14,16,20) employ a spray gun (16) having a tubular body (22) with a longitudinal axis and an exit at one end thereof. The body (22) has a first portion (26) defining a converging passage (38), a second portion (28) defining a diverging passage (40) that defines the exit (32) of the body (22), and a throat portion (30) therebetween that defines a throat (42) between and connecting the converging and diverging passages (38,40). The gun (16) is further equipped with at least one gas inlet (36) for introducing a gas upstream of the converging passage (38), and at least one feedstock inlet (34) for introducing a feedstock at or immediately upstream of the throat (42).</p> |
