| 摘要 |
<p>A method and apparatus are provided for gas phase alloying of a molten metal or molten ceramic with an element (44) dissociated from a reactive gas (36). A plasma gun (18) is used to create a high temperature stream of inert gas which substantially liquefies metal or ceramic particles (30) injected into the stream. The plasma gun (18) is equipped with a reactor (38) wherein a reactive gas (36) is injected into the stream containing the metal or ceramic particles (30). At least one element dissociated from the reactive gas (36) reacts with the liquid metal or ceramic particles (30) suspended in the stream by diffusing into the liquid particles (30) to form a compound of the metal or ceramic and the element in at least a portion of the particles. The thus alloyed particles may be frozen and collected as particles or dispersed onto a substrate (50) and cooled to form a coating.</p> |
