NDLI: Realization of Ru–C Eutectic Point for Evaluation of W

Content Provider	Springer Nature Link
Author	Ogura, H. Masuyama, S. Izuchi, M. Yamazawa, K. Arai, M.
Copyright Year	2015
Abstract	Tungsten–rhenium (W–Re) thermocouples are widely used in industry for measurements at high temperatures, up to $$2000\,^{\circ }\hbox {C}$$ . Since the electromotive force (emf) of a W–Re thermocouple is known to change during exposure at high temperatures, evaluation of the emf stability is essential for measuring temperature precisely and for realizing precise temperature control used to ensure the quality of products subject to annealing processes. To evaluate precisely the thermoelectric stability around $$2000\,^{\circ }\hbox {C}$$ , two Ru–C $$(1953\,^{\circ }\hbox {C})$$ cells (crucible and Ru–C eutectic alloy) were constructed in our laboratory. The key feature of the cells is that their dimensions are large to ensure there is sufficient immersion available to evaluate the homogeneity characteristics of the thermocouples. By using one of the Ru–C cells, the drift and inhomogeneity of Type C (tungsten–5 % rhenium vs tungsten–26 % rhenium) thermocouples during an exposure to high temperature around $$2000\,^{\circ }\hbox {C}$$ were evaluated. Furthermore, to explore possible applications of the eutectic point to other types of high-temperature thermocouples, the drift of an IrRh/Ir thermocouple (iridium–40 % rhodium vs iridium) was also evaluated using another Ru–C cell. The tests with W–Re and IrRh/Ir thermocouples demonstrate that the newly developed Ru–C cells can be used to successfully realize melting plateaux repeatedly. This enables the long-term drift measurements essential for the evaluation and improvement of high-temperature thermocouples. The results obtained in this study will also be useful for evaluating the uncertainty of thermocouple calibrations at around $$2000\,^{\circ }\hbox {C}$$ .
Starting Page	385
Ending Page	398
Page Count	14
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	36
Issue Number	2-3
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2015-01-10
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drift Inhomogeneity IrRh/Ir thermocouple Ru–C eutectic point Type C thermocouple W–Re thermocouple Condensed Matter Physics Mechanics Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Stability of Tungsten–Rhenium Thermocouples in the Range from 0 °C to 1500 °C

Thermocouples with Built-In Self-testing

Realization of Fe–C Eutectic Point Using an Alumina Crucible

Development and Evaluation of a Co–C Eutectic-Point Cell for Thermocouple Calibration

A New Co–C Eutectic Fixed-Point Cell for Thermocouple Calibration at $$1324\,^{\circ }\mathrm{C}$$

Comparisons of Co–C and Pd–C Eutectic-Point Cells for Thermocouple Calibration Between NMIA and NMIJ

Effect of Annealing on Drift in Type S Thermocouples Below $$900\, ^{\circ }\hbox {C}$$

Multi-Mini-Eutectic Fixed-Point Cell for Type C Thermocouple Self-Calibration

Comparison of Co–C Eutectic-Point Cells for Thermocouple Calibration Between SP and NMIJ

Realization of Ru–C Eutectic Point for Evaluation of W–Re and IrRh/Ir Thermocouples

Similar Documents

Stability of Tungsten–Rhenium Thermocouples in the Range from 0 °C to 1500 °C

Thermocouples with Built-In Self-testing

Realization of Fe–C Eutectic Point Using an Alumina Crucible

Development and Evaluation of a Co–C Eutectic-Point Cell for Thermocouple Calibration

A New Co–C Eutectic Fixed-Point Cell for Thermocouple Calibration at $$1324\,^{\circ }\mathrm{C}$$

Comparisons of Co–C and Pd–C Eutectic-Point Cells for Thermocouple Calibration Between NMIA and NMIJ

Effect of Annealing on Drift in Type S Thermocouples Below $$900\, ^{\circ }\hbox {C}$$

Multi-Mini-Eutectic Fixed-Point Cell for Type C Thermocouple Self-Calibration

Comparison of Co–C Eutectic-Point Cells for Thermocouple Calibration Between SP and NMIJ

Realization of Ru–C Eutectic Point for Evaluation of W–Re and IrRh/Ir Thermocouples