DELTA-PHASE ZIRCONIUM HYDRIDE AS A SOLID MODERATOR
In a suady of the preparation and properties of deltaphase zirconium hydride it was found that large, sound bodies of the hydride can be prepared by direct combination of the elements if the rate of the reaction is retarded by limiting the supply of available hydrogen. Specimens up to 1-in. diameter were prepared using this technique. Because delta-phase zirconium hydride does not readily form eutectics with iron- and nickel-base alloys below 1800 deg F these materials may be utilized for cladding the hydride. Delta-phase zirconium hydride is unaffected by exposure to liquid NaK or to nitrogen gas at temperatures below 1000 deg F. The hot hardness of deltaphase zirconium hydride is about 130 kg per mm/sup 2/ at room temperature and 40 kg per mm/sup 2/ at 1500 deg F. The mean coefficient of thermal expansion (68 to 1337F) is 6.5 x 10/sup -6/ per deg F. The thermal conductivity varies from 5.7 Btu/(ft)(hr)(F) at 300 deg F to 5.1 Btu/(ft)(hr)(F) at 1300 deg F. (auth)
- Research Organization:
- Battelle Memorial Inst., Columbus, Ohio
- DOE Contract Number:
- W-7405-ENG-92
- NSA Number:
- NSA-13-007727
- OSTI ID:
- 4259310
- Report Number(s):
- BMI-1243
- Country of Publication:
- United States
- Language:
- English
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