"A multiple exposure back reflection diffraction camera was designed to mount on the vacuum jacket of a pressurized helium gas "Cryomite". With this design it is possible to obtain six diffraction exposures on a single film at any temperature in the range of 180 to 25°K. temperatures within this range are reached in short intervals and exposure periods are less than 30 minutes in a 2.875 inch (73.03 mm) diameter camera. Some of the advantages of this design are; direct measurements, multiple exposures on a single film, short exposures, direct compensation of film length changes due to evacuation or processing of the film, and easy determination of transformation changes. Since the camera design did not permit oscillation of the metal powder specimens, a particle size of 20 micron or less was required to produce continuous lines of less than 0.197 inch (0.50 mm) width at theta angles greater than 70 degrees"--Abstract, page ii.
Straumanis, Martin E., 1898-1973
Weart, Harry W.
Frad, William A., 1909-1974
Planje, Theodore J., 1919-1980
James, William Joseph
Materials Science and Engineering
Ph. D. in Metallurgical Engineering
National Defense and Education Act Title IV Fellowship
University of Missouri--Rolla
x, 132 pages
© 1969 Claude L. Woodard, All rights reserved.
Dissertation - Open Access
Low temperature research
Thermal stresses -- Measurement
X-rays -- Diffraction
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Woodard, Claude Lowell, "X-ray determination of lattice parameters and thermal expansion coefficients of aluminum, silver and molybdenum at cryogenic temperatures" (1969). Doctoral Dissertations. 2322.