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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: The Failure Analysis of Tungsten Rhenium Thermocouple
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 964-968)
Author(s): Hao Yang, Chongqing Instrument Materials Research Institute Chongqing 400700
De-mao Chen, Chongqing Instrument Materials Research Institute Chongqing 400700
Qi Liu, Chongqing Instrument Materials Research Institute Chongqing 400700
Xue-jun Xin, Chongqing Instrument Materials Research Institute Chongqing 400700
Xiao-liang Yang, Chongqing Instrument Materials Research Institute Chongqing 400700
Zhou Yu, Chongqing Instrument Materials Research Institute Chongqing 400700
Abstract: This paper discusses the possible chemical reactions and its condition of Tungsten Rhenium thermocouple in nitrogen gas at high temperature containing graphite by thermodynamic calculation and energy dispersive spectroscopy(EDS) test. The studies show that the complicated chemical reactions among nitrogen gas, graphite and W-Re are the reasons of W-Re thermocouple failured at high temperature. In the assemble process of Tungsten Rhenium thermocouple, it is not suitable for SiC to be used as insulated materials for W-Re thermocouple and tries to avoid the crossed contamination among graphite quartz sand and W-Re. alloy
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