THERMOPHYSICAL PROPERTIES OF ZIRCONIUM HYDRIDE
Thermal conductivity values were determined for three Zr--H alloys containing 60.0, 56.6, and 45,3 at.% H, A definite negative coefficiert of conductivity was observed for the delta hydride (60.0 at.% H) over the test range (300 to 720 deg C). The observed conductivities at the lower hydrogen levels are discussed in terms of the phases present, Dilatometric data for four Zr--H alloys ranging from 41.0 to 64.7 at.% H are presented. The average expansion coefficient for delta phase (60.7 at.% H) from 200 to 850 deg C was shown to be 14.2 x 10/sup -6 per C. Reasons are given to explain some of the grossly contradictory expansivity data which have appeared in the literature. Heat capacity data from drop calorimeter tests are presented for three Zr--H alloys containing 64.0, 57.1, and 50.2 at.% H. Specific heat curves were obtained from the data for delta phase (57.1 at.% H) in the range from 500 to 750 deg C and for epsilon phase (64.0 at.% H) in the range from 200 to 625 deg C. In additi on to the experimental data, a technique is described for producing massive test specimens which are free of cracks and of uniform hydrogen content. (auth)
- Research Organization:
- Univ. of Denver
- NSA Number:
- NSA-17-004940
- OSTI ID:
- 4756512
- Journal Information:
- Am. Soc. Metals, Trans. Quart., Journal Name: Am. Soc. Metals, Trans. Quart. Vol. Vol: 55
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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