A STUDY OF THE PHOSPHIDATION OF ZIRCONIUM
The direct interaction between phosphorus vapor at 1 atm and Zr metal was studied over the temperature range from 500 to 1100 deg C. At first, the reaction layer being less than 1 mu thick, only subphosphide of the probable composition Zr/sub 3/P was formed. Further phosphidation yielded the hexagonal monophosphide ZrP, besides traces of subphosphide. The rate of reaction was small between 500 and 700 deg C and increased rapidly above 700 deg C. At 1000 deg C it is a linear function of time for reaction layers less than 0.05 mm thier. This indicates that possibly due to cracks in the brittle phosphide layer, the phosphidation takes place always at a fresh metal surface. A nonidentified black phase containing Zr and possibly phosphorus was vapor-deposited on the walls of the reaction tubes. (auth)
- Research Organization:
- Pennsylvania State Univ., University Park
- NSA Number:
- NSA-18-008332
- OSTI ID:
- 4099295
- Report Number(s):
- TID-19990 Paper 5
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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