Sensors for monitoring the processing of carbon-carbon composites

Bernhard R. Tittmann; C. Eric Yen

doi:10.1117/12.207712

20 April 1995 Sensors for monitoring the processing of carbon-carbon composites

Bernhard R. Tittmann, C. Eric Yen

Proceedings Volume 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation; (1995) https://doi.org/10.1117/12.207712
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

Carbon-carbon composite are used in many applications including aircraft disk brakes, space shuttle leading edges, rocket inlet nozzles and exit cones, and are currently being considered for future aircraft structural components, because of their mechanical stability under adverse temperature conditions. Unfortunately, the processing of carbon-carbon composites, especially the first carbonizations, has a relatively low yield, because of in-process interply failure leading to catastrophic delaminations. Considerable amount of man-power, equipment time and material are lost. Here we report on the progress in the development of sensors for monitoring these catastrophic events during the first carbonization. Specifically, acoustic emission sensors and gas sensors are singled out as the most promising ones for monitoring the evolution of micro and macro-structural changes during the first carbonization. Analysis of the high temperature waveguide was undertaken to determine the optimum waveguide geometry so that only a single mode is allowed to propagate in the waveguide.

Citation Download Citation

Bernhard R. Tittmann and C. Eric Yen "Sensors for monitoring the processing of carbon-carbon composites", Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); https://doi.org/10.1117/12.207712

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available