Spectroscopic wear detector

Details Spectroscopic wear detector Spectroscopic wear detector

1991-06-27

1993-02-16

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

73 86, 60223, 356311, 356 36, G01J 300, G01N 2100, G01N 1700

Patent

active

051875420

ABSTRACT:
The elemental composition of a material exposed to hot gasses and subjected to wear is determined. Atoms of an elemental species not appearing in this material are implanted in a surface at a depth based on the maximum allowable wear. The exhaust gasses are spectroscopically monitored to determine the exposure of these atoms when the maximum allowable wear is reached.

REFERENCES:
patent: 3712736 (1973-01-01), Boncoeur et al.
patent: 3735591 (1973-05-01), Burkhart
patent: 3745816 (1991-07-01), Erickson et al.
patent: 4120196 (1978-10-01), Hamilton et al.
patent: 4514797 (1985-04-01), Begin
patent: 4620185 (1986-10-01), Plahmer
patent: 4774150 (1988-09-01), Amano et al.
Monika Auweter-Kurtz et al.; "Cathode Phenomena in Plasma Thrusters"; Jul. 18-20, 1990; AIAA 90-2662.
Kurtz et al.; "Mechanisms of Hot Cathode Erosion in Plasma Thrusters"; Jul. 18-20, 1990; AIAA 90-2673.

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