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Title: HEAT TREATMENT OF ELECTROPLATED URANIUM

Abstract

A method is described for improving electroplated coatings on uranium. Such coatings are often porous, and in an effort to remedy this, the coatings are heat treated by immersing the coated specimen ln a bath of fused salt or molten methl. Since the hase metal, uranium, is an active metal, such a procedure often results in reactions between the base metal and the heating medium. This difficulty can be overcome by using liquid organopolysiloxanes as the heating medium.

Inventors:
Publication Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4287248
Patent Number(s):
US 2841539
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-13-000982
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
PATENTS; CHEMICAL REACTIONS; COATING; ELECTROPLATING; FUSED SALTS; HEAT TREATMENTS; LIQUID METALS; ORGANIC COMPOUNDS; POROSITY; SILICONES; SILOXANES; URANIUM

Citation Formats

Hoglund, P.F.. HEAT TREATMENT OF ELECTROPLATED URANIUM. United States: N. p., 1958. Web.
Hoglund, P.F.. HEAT TREATMENT OF ELECTROPLATED URANIUM. United States.
Hoglund, P.F.. 1958. "HEAT TREATMENT OF ELECTROPLATED URANIUM". United States. doi:.
@article{osti_4287248,
title = {HEAT TREATMENT OF ELECTROPLATED URANIUM},
author = {Hoglund, P.F.},
abstractNote = {A method is described for improving electroplated coatings on uranium. Such coatings are often porous, and in an effort to remedy this, the coatings are heat treated by immersing the coated specimen ln a bath of fused salt or molten methl. Since the hase metal, uranium, is an active metal, such a procedure often results in reactions between the base metal and the heating medium. This difficulty can be overcome by using liquid organopolysiloxanes as the heating medium.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1958,
month = 7
}
  • A heat treatment for U is proposed which reduces grain size of castings. It consists of heating in a salt bath to 735 C for 13 min followed by a quench in CaCl/sub 2/ brine at -30 C. Average grain size of macro 0.25 mm is obtained. (T.R.H.)
  • This patent describes an apparatus for forming the temperature gradient in environment of a workpiece arranged in a space of regulated temperature. The apparatus consists of: a. a furnace with housing having an input opening at one side, b. a heating element of regulatable power defining an inner zone of maximal temperature in the inner space of the furnace, c. an inner temperature sensing unit coupled with the inner zone for generating a signal corresponding to the temperature of the inner zone. d. a first regulating unit for adjusting power of the heating element according to the signals of themore » inner temperature sensing unit. e. an adaptor closing the inner space of the furnace by close connection with the input opening, the adaptor being pushable into the inner space through the input opening, having an outer zone of minimal temperature and including a housing made of material of high thermal conductivity surrounding the workpiece between the outer and inner zones, f. means for displacing the adaptor, g. an outer temperature sensing unit coupled with the outer zone, moving together with the adaptor for generating a signal corresponding to the temperature of the outer zone, h. a second regulating unit for adjusting displacement of the adaptor via the displacing means according to the signals of the outer temperature sensing unit and i. a steady cooling system for cooling the adaptor from the side of the outer zone by a cooling substance circulated, wherein the first regulating unit controls the temperature of the inner zone of the furnace by adjusting power of the heating element and the second regulating unit controls the temperature of the outer zone by adjusting displacement of the adaptor, for forming the temperature gradient.« less
  • The invention provides a process for forming a magnetic thin film on a base film, a heat treatment process of a thin film sheet consisting of the base film and the magnetic thin film, and an apparatus for performing heat treatment of the thin film sheet. Tension applied to the thin film sheet is substantially equal to that applied to the base film when the magnetic thin film is formed thereon. Then, the thin film sheet is treated with heat. The thin film sheet is heated with a given temperature gradient to a reactive temperature at which heat shrinkage occurs,more » while the tension is being applied thereto. Thereafter, the thin film sheet to which the tension is still applied is cooled with substantially the same temperature gradient as applied in heating. The heat treatment apparatus has a film driving unit including a supply reel, a take-up reel, a drive source and guide rollers; a heating unit including heating plates, heater blocks and a temperature controller for heating the sheet to the reactive temperature; and a heat insulating unit including a thermostat and another temperature controller for maintaining the sheet at the nonreactive temperature which is slightly lower than the reactive temperature.« less
  • A process is given for the recovery of U from U ores by dissolution, oxidation of the U to the soluble uranyl form, and separation of U by ion exchange or other means. In this process, the filtered pulp is divided into two streams, one of the streams is stirred to form a vortex, and O/sub 2/ and SO/sub 2/ are passed through the vortex to form ferric sulfate and sulfuric acid. This stream is recirculated to the ore for dissolution and oxidation, whlle the other stream is treated for U recovery. (D.L.C.)