Download or read book Synthesis and Fabrication of Refractory Uranium Compounds written by and published by . This book was released on 1959-05 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and fabrication of refractory uranium compounds summary report May 1959 through December 1960 written by K. M. Taylor and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS First Quarterly Report March 1 Through May 31 1961 written by and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Activities in a program to obtain UC pellets of maximum density for irradiation testing are described. A study was made of the effects of the UC powder thermal history, sintering time, sintering temperature, and additives on the UC sinterability. Preliminary results indicate that the UC powder synthesized under the most severe conditions of temperature and time (1740 deg C, 107 min) was less sinterable than powders prepared at lower temperatures, or at the same temperature for shorter time. It was also concluded that although both temperature and time of sintering pellets affect density, temperature is more important. Additions of Fe (0.1 to 1.0%) improve sinterability and promote grain growth. The final density obtained on sintering in a vacuum was about the same as that resulting from sintering in He at atmospheric pressure. (J.R.D.).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Summary Report for May 1959 Through December 1960 written by and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Activitiee are described in an investigation to develop refractory U materiala for superior reactor fuels. Uranium carbide was prepared by cold pressing in pellets with densitier of 92 to 96% of theoretical. Uranium nitride was synthesized, and it was found that dense specimens (95% of theoretical) could be obtained in N-deficient powder, however in stochiometric compositions the maximum density obtained was 85% of theoretical. In other work dense uranium silicide was prepared and several properties of UC, UN, and U3Si2 were studied. (J.R.D.).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Monthly Progress Report No 8 for April 1 Through April 31 1960 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effort on uranium silicide during the repent period was equally divided between synthesis and fabrication. The goal for the synthesizing effort was to make U38i2 of higher purity than that made in the past, and the goal for the fabrication effort was to make pellets of density higher than 93%. Both goals were achieved. Experiments in simultaneous synthesis and fabrication of uranium monocarbide are reported in which mixtures of uranium powder and carbon were hot pressed. Sintering experiments on uranium monocarbide produced pellets of 91 to 91% theoretical density; however, cracking and oxidation were observed. Further experiments are planned in which oxidation will be reduced to a minimum. (J.R.D.).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Quarterly Report No 5 August 1 Through October 31 1960 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Additional quantities of UC, UN, and U3Si2 were prepared to be used in fabrication of test specimens for property determinations. A reduction in oxygen contamination of UN and U3Si2as achieved by improved techniques of synthesis.>s Preliminary values for thermal expansion, modulus of elasticity, and corrosion in boiling water were also obtained for these materials. (For preceding period see TID-6591.) (J.R.D.).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Monthly Progress Report No 10 for September 1 Through September 30 1960 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Several synthesis experiments were carried out to provide a stock of U/ sub 3/Si2, powders for fabrication of test specimens. Initial thermal- expansion characteristics were determined on U3Si2 bars. High densities were obtained in the preparation of UN bodies. Thermal-expansion tests were made on bars of UN with a high-density silicon carbide tube dilatometer in a flowing argon atmosphere. (W.L.H.).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Monthly Progress Report No 11 November 1 November 30 1960 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Batches of UC were synthesized for use in fabrication of specimens for physical property determinations. This synthesis was carried out with mixed loose powders in a graphite crucible. Two and one-half pound batches of UN were synthesized using a stainless steel boat and an Inconel muffle furnace. Three batches of U3Si2 were synthesized with particular emphasis on controlling the rate of the reaction by limiting the maximum temperature to 1500 deg C. In addition, determinations were made of modulus of rupture, shear modulus, and Poisson's ratio of sintered UC, UN, and U3Si2 specimens. (M.C.G.).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Quarterly Report No 4 for March 1 to April 30 and July 31 1960 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Additional work on the synthesis and fabrication of uranium nitride produced an improved product free of oxide contamination as indicated by x-ray analysis. Further work to increase the density of the sintered pellets is needed. A stock of several pounds of stoichiometric uranium monocarbide was prepared by carbon reduction of uranium dioxide. Pellets having bulk densities ranging from 93 to 96% theoretical were obtained by cold pressing and sfntering. Initial experiments on the fabrication of bars, 3 by 1/2 by 1/4 in., by cold pressing and sintering, resulted in sound but somewhat low-density bodies. A few experiments were conducted on the production of uranium monocarbide from ammonium diuranate. The results indicate that considerable addftional work may be necessary to consistently produce a stoichiometric product. The simultaneous synthesis ard hot pressing of uranium monocarbide was funther studied and pellets with balk densities as high as 96.6% theoretical (based on 100% UC) were produced. However, metallographic examination disclosed the presence of some free uranium metal in all pellets. The synthesis of 1-lb batches of U3Si2 of improved quality was successfully carried out by a nonquench method. Using the U/ sub 3/Si2 so produced, sound pellets with bulk densities up to 98.5% theoretical were prepared by cold pressing and sintering. The sintering technique was also used to produce 3- by 1/2- by 1/4-in. bars for physical- property tests. (auth).
Download or read book SYNTHESIS AND FABRICATION OF REFRACTORY URANIUM COMPOUNDS Monthly Progress Report No 6 for January 1 Through January 31 1960 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Preparation of about 1200 g of uranium nitride powder is reported. Experiments indicated that synthesis of mononitride by decomposition of higher nitrides required pro longed heating at high temperature. Chemical analysis of uranium nitride for nitrogen was found to be difficult. Data from analysis of these compounds are tabulated for comparison with calculated composition. Sintering studies of uranium mononitride continued during the report period. Work on uranium silicide formation from the elements without quenching was continued, and effects of crucible material on the synthesis of the material were investigated. (For preceding period see ORC-254.) (J.R.D.).
Download or read book Reactor Core Materials written by and published by . This book was released on 1961 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactor Materials written by and published by . This book was released on 1962 with total page 370 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 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: NSA is a comprehensive collection of international nuclear science and technology literature for the period 1948 through 1976, pre-dating the prestigious INIS database, which began in 1970. NSA existed as a printed product (Volumes 1-33) initially, created by DOE's predecessor, the U.S. Atomic Energy Commission (AEC). NSA includes citations to scientific and technical reports from the AEC, the U.S. Energy Research and Development Administration and its contractors, plus other agencies and international organizations, universities, and industrial and research organizations. References to books, conference proceedings, papers, patents, dissertations, engineering drawings, and journal articles from worldwide sources are also included. Abstracts and full text are provided if available.
Download or read book U S Government Research Reports written by and published by . This book was released on 1961 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactor Technology written by and published by . This book was released on 1972 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Nitridation Rates of Uranium fissium Alloys written by J. P. LaPlante and published by . This book was released on 1962 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nitridation rates of uranium-5% fissium alloys were investigated at about 200 to 650 deg C and at nitrogen concentrations in argon from about 0.5 to 100%. The effects of Na coatings and irradiation of the alloy were examined. The nitridation rates of the alloys followed a parabolic law, with activation energies between 14 and 16 kcal/mole. The ignition behavior of irradiated alloy in nitrogen-argon mixtures was investigated briefly.
Download or read book Proceedings of the Uranium Carbide Meeting written by and published by . This book was released on 1961 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
