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Nuclear reactor metallurgy

About: The article was published on 1958-01-01 and is currently open access. It has received 12 citations till now. The article focuses on the topics: Nuclear reactor.
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Journal ArticleDOI
TL;DR: In this article, a theory was developed to analyze the deformation produced in eutectic composites by temperature changes, and experimental determinations of the coefficient of expansion were used to test the predictions of that theory.
Abstract: In part I a theory was developed to analyze the deformation produced in eutectic composites by temperature changes. Experimental determinations of the coefficient of expansion are used here to test the predictions of that theory. Measurements of length versus temperature in the absence of external stresses were made for Al-Al3Ni, Al-CuAl2, and Sb-Cu2Sb eutectic composites, and for monolithic 6061 Al. Hysteresis loops in the graph of composite coefficient of expansion vs temperature are seen when the expansion coefficients of the phases are different and plastic deformation occurs. The nature of the hysteresis is shown to depend upon heating and cooling rates, prior history and the relative values of the matrix and reinforcement expansion coefficients. The theory correctly predicts these qualitative effects. In Al-Al3Ni the available component data justify a quantitative comparison of calculated and experimentally determined coefficient of expansion-temperature curves. The values compare well, further verifying the analytical approach.

40 citations

Journal ArticleDOI
TL;DR: In this paper, an overview of the properties of transuranium superconductors, but also of the non-superconducting (non-transuranium analogues of uranium supercondors) is presented.

19 citations

Patent
19 Nov 1991
TL;DR: In this paper, a low cost continuous process for separating and purifying zirconium and hafnium which eliminates liquid waste and facilitates the management of RCRA and LLW wastes is provided.
Abstract: A simple, low cost continuous process for separating and purifying zirconium and hafnium which eliminates liquid waste and facilitates the management of RCRA and LLW wastes is provided. An aqueous zirconium and hafnium - containing feed solution is prepared and fed to a continuously rotating annular chromatograph containing a bed of acid exchange resin. An acid eluant, such as hydrochloric acid, nitric acid, phosphoric acid or the like, is fed through the acid exchange bed while the chromatograph is rotating, which separates the feed into substantially pure zirconium and hafnium fractions and into RCRA and LLW waste fractions. The zirconium and hafnium are processed further into nuclear quality zirconium and hafnium metals. The acid eluant is recycled for reuse in the chromatograph, and the RCRA and LLW waste fractions are disposed of in solid form.

14 citations

Journal ArticleDOI
TL;DR: Levitation melting as a technique for melting metallic materials was proposed in 1923 but has not been widely applied for small quantities of material, because it is time-consuming and somewhat complicated as discussed by the authors.

8 citations

Journal ArticleDOI
TL;DR: In this article, the model of korrelativen stossprozesse eignet sich fur die Deutung des Strahlungswachstums von α-Uran and der damit in Verbindung stehenden Erscheinungen.

8 citations