PROBLEMS OF INVESTIGATING THERMOELECTRODE ALLOYS, STABLE TO OXIDATION UP TO 2000 Deg. C
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
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The possibility of developing a thermocouple capable of measuring temperatures up to 2000 deg. C in oxidizing media and in air was studied. Only alloys based on Ir are suitable for such thermocouples. A review is given on work done on the development of high-temperature thermocouples performing in oxidizing media. The thermocouple Ir-60RhIr, suitable for measuring temperatures up to 2000C for 10-20 hrs. in air was the best of the known thermocouples. Data for heat resistance, phase compn. of Ir alloys, and properties of pure metals indicate that good thermoelectric properties and high stability can be found in alloys of Ir with Rh, Pt, Pd, and Au. Alloys of Ir with nonnoble metals, and complex alloys based on Ir can also be used.
- Properties of Metals and Alloys
- Test Facilities, Equipment and Methods