DEVELOPMENT OF HIGH-TEMPERATURE STRAIN GAGES. National Bureau of Standards Monograph No. 26
Technical Report
·
OSTI ID:4034285
A summary is presented of a program aimed at the improvement of high- temperature strain gages of the electrical resistance type. Potential ceramic and metal components were evaluated and a gage was devised that was based on the evaluations. The gage (NBS 5B) was flexible and easy to install; however, it lacked resistance stability at higher temperatures. In an attempt to minimize this deficiency, ceramic cements were developed that showed greater electrical resistivity than was previously observed at 800 to l,800 deg F. A technique was devised for increasing the resistance to ground by applying a fired-on ceramic coating to the grid of a specially developed unbacked gage. A study was made of the cause of the erratic response of cemented gages that was not preheated prior to use. There were strong indications that the erratic response was caused mostly by the rapid decrease in resistance that accompanied structural changes in the cement. (auth)
- Research Organization:
- National Bureau of Standards, Washington, D.C.
- NSA Number:
- NSA-15-015754
- OSTI ID:
- 4034285
- Report Number(s):
- NP-9985
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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