THERMAL EXPANSION OF ZIRCONIUM BETWEEN 298 AND 1600 K
Abstract
The Zr was prepared by the iodide method and contained about 1 at -% Hf. Specimens in the form of rods about 0.05 cm in diameter were used in the x- ray diffraction method for determining the 2 expansion coefficients of hexagonal Zr. Measurements of bulk thermal expansion were made on a specimen about 25.4 cm long and 0.62 cm in diameter, which had 2 black-body holes (each 0.099 cm in diameter) drilled 5 cm from each end. The average coefficients of linear expansion between 298 deg and 1143 deg K were determined to be 5.5 x 10-6 deg-1 along the a-axis and 10.8 x 10-6 deg-1 along the c-axis, and 7.2 x 10-6 deg-1 for a randomly oriented polycrystalline sample. The average value of the linear coefficient of expansion of cubic Zr between 1143 deg and 1600 deg K is 9.7 x 10-6 deg-1, as measured by the comparator method. A decrease in volume of 0.66% occurs at the transition.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 1953
- Accession Number
- AD0004340
Entities
People
- Gordon B. Skinner
- Herrick L. Johnston
Organizations
- Ohio State University