Simple chemical vapor deposition systems for depositing multiple-metal aluminide coatings

摘要

A chemical vapor deposition (CVD) system and method for applying an aluminide coating constituted by two or more extrinsic metal components on a jet engine component. The aluminide coating is capable of forming a protective complex oxide upon subsequent heating in an oxidizing environment. At least one of the extrinsic metals in the aluminide coating is provided as a first vapor phase reactant from a receptacle coupled by a closed communication path with the reaction chamber of the CVD system and free of a carrier gas. The aluminide coating is formed by the chemical combination of the first vapor phase reactant with a second vapor phase reactant either created in situ in the reaction chamber or supplied by a carrier gas to the reaction chamber from a precursor source.

主权项

1. A chemical vapor deposition system for forming a coating on a jet engine component by use of first and second donor materials, the chemical vapor deposition system comprising:
a main reaction chamber including an interior space configured to hold said jet engine component and the first donor material; a first heater configured to heat the main reaction chamber, the first donor material, and said jet engine component to create a deposition environment in the interior space that contains a first vapor phase reactant from the first donor material; a first receptacle external of the main reaction chamber and adapted to hold the second donor material, the first receptacle communicating with the deposition environment of the main reaction chamber via a communication path so as to share the deposition environment of the main reaction chamber and to permit transport of the second vapor phase reactant from the first receptacle to the main reaction chamber, the first receptacle being free of fluid communication with a source of carrier gas, being free of fluid communication with a source of corrosive gas, and being sealed but for the communication path that is otherwise closed; and a second heater different from the first heater and configured to heat the first receptacle to a temperature different from the temperature of the main reaction chamber, wherein the first vapor phase reactant and the second vapor phase reactant, at least one of which contains a first extrinsic metal, cooperate to form the coating containing the first extrinsic metal on the jet engine component.