Accession Number : ADA330479

Title :   High Temperature Sensors and Arrays for Turbomachines

Descriptive Note : Final rept. 1 Sep 96-31 Aug 97

Corporate Author : VATELL CORP CHRISTIANSBURG VA

Personal Author(s) : Langley, Lawrence W.

PDF Url : ADA330479

Report Date : 01 SEP 1997

Pagination or Media Count : 16

Abstract : The objective of this program was to create an apparatus and method for laser chemical vapor deposition (LCVD) of sensors in vacuum under control of a multi-axis positioning system. The system will be used to deposit sensors directly on the curved surfaces of turbine blades, which are insulated beforehand with a sputtered layer of alumina, 20 to 40 microns thick. This system embodies several departures from conventional LCVD. A continuous laser is employed instead of a pulsed laser, to improve the consistency and rate of deposition. The evaporation chamber is inside the vacuum chamber and closely coupled to the nozzle which floods the laser focal point. The entire vapor path is heated, with the objective of improving the speed and efficiency of vapor conversion to deposited metal. Unconverted vapor is scavenged by a carrier flow of inert gas before it can enter the main chamber.

Descriptors :   *CHEMICAL VAPOR DEPOSITION, *TEMPERATURE SENSITIVE ELEMENTS, PULSED LASERS, VACUUM CHAMBERS, TURBINE BLADES, LASER APPLICATIONS.

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE