Patent ID: 7338202
Filing Date: 2008-03-04
Classification: B81B,B81C,G01K,G01N

Abstract:
1. A process for producing a series of micro electro mechanical system (MEMS)-based sensors for high temperature flow path applications wherein sensors are fabricated with polymer derived ceramics (PDCs), comprising the steps of: a) selecting a polymer precursor consisting of silicon, carbon and nitrogen with excellent thermo-mechanical properties at high temperatures; b) incorporating in the polymer precursor a sensor for sensing point measurements in environmental conditions; c) incorporating in the polymer precursor a sensor for determining flow path conditions in said environmental conditions; d) shaping and crosslinking the polymer precursor incorporating the point measurements sensor and the flow path conditions sensor to form an infusible network of polymer components; and e) converting the polymer components to a polymer derived ceramic (PDC) by pyrolysis at temperatures from about 800 to about 1200° C., to provide MEMS-based sensors for use in high temperature flow path applications, that output to a recording device for accurate, real-time, on-line, in-situ condition monitoring while withstanding environmental conditions up to about 2000° K without external cooling.