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Abstract:
The ternary zirconium-tantalum- carbon system was investigated using X-ray, DTA, melting point, and metallographic techniques on chemically analyzed alloys; a complete phase diagram for temperatures above 1000 C was established. The system contains a high melting continuous solid solution of binary monocarbide phases; a moderate zirconium-tantalum exchange occurs in both the high and low temperature modifications of the subcarbide, Ta2C. Two four-phase reaction planes and two limiting tie-lines are present in the metal-rich portion of the ternary diagram. A minimum melting point occurs in the zirconium-rich portion of the ternary. The results of this investigation are described and discussed; selection of alloys for general high temperature applications is discussed in the light of the results of the Zr-Ta-C investigation. A brief thermodynamical evaluation of the system is given along with a calculated isothermal section at 1500 C. (Author)
| Description: |
Technical rept. |
| Pages: |
72 |
| Report Date: |
NOV 1965 |
| Contract Number: |
615, AF336151249 |
| Report Number: |
0426674 |
Report Unavailable |
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