Download or read book Thermal Expansion of Alpha zirconium Single Crystals written by Lowell T. Lloyd and published by . This book was released on 1963 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single crystals of alpha zirconium were used to measure, between room temperature and 860 deg C, the thermal expansions in the two principal crystallographic directions of the hexagonal-close-packed structure. The measurements were made with a dilatation interferometer. Equations which represent the lengths along the a and c axes and volume as functions of temperature are included.

Download or read book Thermal Expansion of Alpha uranium Single Crystals written by L. T. Lloyd and published by . This book was released on 1959 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dilatometric measurements have been obtained between 25 and 650 degrees C from alpha-uranium single crystals in the three principle crystallographic directions.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Temperature Deformation Characteristics of High Purity Zirconium Single Crystals written by David George Goodrich and published by . This book was released on 1970 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: High purity single crystals of zirconium were produced and mechanically strained in the temperature range from 4.2°K to 293°K. The crystals were produced by thermal treatment with a specially constructed electron beam zone refiner which provided the abrupt temperature gradient necessary for crystal growth. Specimens were electrolytically machined to have a reduced center section and chemically polished. Both examination under polarized light and Laue back reflection patterns were necessary to select specimens without alpha variants. Single crystals were tested at liquid helium temperature in a cryostat which was constructed for this study. Intermediate test temperatures were obtained with the specimen immersed in the proper refrigerant. The flow stress was determined for strains of 0.02%, 0.1%, and 0.2%. Strain rate was cycled from 0.002 inches per minute to 0.02 inches per minute to obtain data for calculation of activation volumes. The flow stress versus temperature curve was found to level off at a temperature of approximately 120°K which is 330°K lower than the lowest temperature observed previously for the phenomina. A pronounced peak in the curve of activation volume versus temperature was found at 230°K. Two possible explanations are proposed for the peak in activation volume. Inverse strain rate sensitivity was observed in three specimens two of which were tested at room temperature and one in liquid nitrogen. No evidence of basal slip or twinning was found at any temperature. A complete description of the design and operation of the zone refiner and cryostat is given in separate appendixes.

Download or read book Creep of Zirconium Alloys in Nuclear Reactors written by and published by ASTM International. This book was released on with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Creep of Zirconium Alloys in Nuclear Reactors written by D. G. Franklin and published by ASTM International. This book was released on 1983 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Coefficients of Thermal Expansion for Zirconium written by R. B. Russell and published by . This book was released on 1951 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Expansion of Crystals written by R.S. Krishnan and published by Elsevier. This book was released on 2013-10-22 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal Expansion of Crystals is a comprehensive examination of the various aspects of thermal expansion of crystals. The book provides both theoretical and experimental aspects of the study of thermal expansion. Chapters are devoted to subjects on measurement methods of thermal expansion; the theory of thermal expansion; behavior of thermal expansion during the occurrence of phase transformations; and thermal expansions in ferroelectric materials. Physicists and researchers, both theoretical and experimental, in the field of thermal expansion of crystals will find this book a valuable piece of reference.

Download or read book THERMAL EXPANSION OF ALPHA URANIUM SINGLE CRYSTALS written by and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Expansion of Zirconium and Zirconium tin Alloys Up to 570 C written by Marvin Moskowitz and published by . This book was released on 1952 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Metallurgy of Zirconium written by David Leslie Douglass and published by . This book was released on 1971 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List written by and published by . This book was released on 1948 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dimensional Instability written by R. E. Maringer and published by . This book was released on 1971 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The point of the memorandum is to emphasize the danger in accepting engineering data at face value. The definition of units used in the measurement of engineering parameters related to solid materials is discussed. A major portion of the memorandum is concerned with micromechanical strength parameters in solids such as yield strength, elastic limit, and proportional limit. Variation of elastic 'constants' in ordinary engineering materials under various conditions is discussed. A final section of the memorandum discusses variation of the thermal expansion coefficient in materials. (Author).

Download or read book Atomic Energy Research Reports for Sale by the U S Department of Commerce Office of Technical Services written by Business and Defense Services Administration and published by . This book was released on 1963 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review of Extraction Processing Properties and Applications of Reactive Metals written by Brajendra Mishra and published by John Wiley & Sons. This book was released on 2013-10-21 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume from the 1999 TMS Annual Meeting is intended to serve as a compendium on reactive metals. Specifically, this book concentrates on zirconium, hafnium, molybdenum, niobium, beryllium, and titanium. Covering different aspects of extraction and recovery, metal refining, processing, and current and potential applications of these metals, this volume serves as a valuable reference source on reactive metals.

Download or read book Investigation of Thermal Shock Resistance of Zirconia with Metal Additions written by Alan Arias and published by . This book was released on 1964 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zirconium oxide or Zirconia has a melting point of about 27000, is resistant to chemical attack by acids and bases, is very stable at high temperatures in oxidizing atmospheres, and is inert when in contact with most metals at high temperatures. In addition, zirconia is relatively inexpensive and abundant. These characteristics of zirconia would make it a very satisfactory material for many high-temperature applications, were it not for the fact that pure zirconia undergoes an allotropic transformation from tetragonal to monoclinic on cooling through a temperature range in the neighborhood of 900 C. This transformation takes place with a volume increase of about 3 percent. During the reverse transformation near 11000 C on heating, zirconia shrinks by about the same amount. The large anisotropic volume changes associated with the transformation cause bodies made from pure zirconia to disintegrate during their manufacture or when in use. In practice, this difficulty is circumvented by adding small amounts of certain Oxides, such as calcia, magnesia, yttria, etc., to zirconia. Depending on the kind and amount of oxide added to the zirconia, the high-temperature crystal structure of the combination is totally or partially retained on cooling, and the allotropic transformation is also totally or partially suppressed. This so-called stabilized zirconia performs satisfactorily in many high-temperature applications, but the addition of stabilizing oxides also introduces some undesirable features, such as an increase in the thermal-expansion coefficient, a lowering of the melting point, and, for some types of stabilized zirconia, a tendency to disintegrate on prolonged thermal cycling. A zirconia-base material combining the high-temperature properties of pure zirconia without the disadvantages associated with the use of stabilizers would be highly desirable.