US2595924A - Quaternary bismuth alloy - Google Patents

Quaternary bismuth alloy Download PDF

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Publication number
US2595924A
US2595924A US132796A US13279649A US2595924A US 2595924 A US2595924 A US 2595924A US 132796 A US132796 A US 132796A US 13279649 A US13279649 A US 13279649A US 2595924 A US2595924 A US 2595924A
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United States
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bismuth
thallium
alloy
tin
lead
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US132796A
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Oscar N Carlson
Harley A Wilhelm
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US Atomic Energy Commission (AEC)
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US Atomic Energy Commission (AEC)
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S376/00—Induced nuclear reactions: processes, systems, and elements
    • Y10S376/90—Particular material or material shapes for fission reactors
    • Y10S376/904—Moderator, reflector, or coolant materials
    • Y10S376/906—Metal

Definitions

  • This invention deals with a bismuth alloy and, in particular, with a quaternary bismuth alloy containing lead, tin and thallium.
  • alloys of this invention consisted of 56.3% bismuth, 21.4% lead, 17.4% tin and 4.9% thallium and had a melting point of 91 C.
  • Another embodiment of this invention is the following alloy: 60.3% bismuth, 19.4% lead, 17.3% tin and 3.0% thallium; its melting point was found to be between 88 and 89 C.
  • the alloys of this invention are excellently usable as coolants. Due to their low thallium content, they have a. very low neutron capture cross-section so that they may be advantageously used as coolants for atomic power piles and the like.
  • the alloys may be prepared by any method customary in the art.
  • An alloy consisting substantially of from to bismuth, from 19 to 22% lead, from 17 to 18% tin and from 3 to 5% thallium.
  • OSCAR N CARLSON.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Description

Patented May 6, 1952 QUATERNARY BISMUTH ALLOY Oscar N. Carlson and Harley A. Wilhelm, Ames, Iowa, assignors to the United States of America as represented by the United States Atomic Energy Commission No Drawing. Application December 13, 1949, Serial No. 132,796
3 Claims. 1
This invention deals with a bismuth alloy and, in particular, with a quaternary bismuth alloy containing lead, tin and thallium.
It is an object of this invention to provide a bismuth alloy which is characterized by a low melting point.
It is another object of this invention to provide a bismuth alloy which is characterized by a high resistance to corrosion.
It is still another Object of this invention to provide a bismuth alloy which is characterized by a low'neutron capture cross-section.
These and. other objects are accomplished by providing an alloy containing from 55 to 65% by weight of bismuth, from 19 to 22% by Weight of lead, from 17 to 18% by weight of tin and from 3 to 5 by weight of thallium.
It has been found that while the ternary system, without thallium, has a eutectic composition of 50% bismuth, 32% lead and 18% tin with a melting point of 96 C., the same alloy with thallium added, when cooled from its molten condition, starts to solidify at 112 C. and is completely solidified at 95 C. From this, it seemed that thallium hardly had any reducing effect on the melting point of the ternary eutectic.
It was found by the inventors that the combination of a higher bismuth content than that of the quaternary alloy with a lower thallium content, namely, a mixture containing from 55 to 65% bismuth and from 3 to 5% thallium, had a still lower melting point than any of those experienced with the alloys previously made and investigated.
One example of the alloys of this invention consisted of 56.3% bismuth, 21.4% lead, 17.4% tin and 4.9% thallium and had a melting point of 91 C.
Another embodiment of this invention is the following alloy: 60.3% bismuth, 19.4% lead, 17.3% tin and 3.0% thallium; its melting point was found to be between 88 and 89 C.
The alloys of this invention, on account of their low melting point, are excellently usable as coolants. Due to their low thallium content, they have a. very low neutron capture cross-section so that they may be advantageously used as coolants for atomic power piles and the like.
The alloys may be prepared by any method customary in the art.
It will be understood that this invention is not to be limited to the details given herein but that it may be modified within the scope of the appended claims.
What is claimed is:
1. An alloy consisting substantially of from to bismuth, from 19 to 22% lead, from 17 to 18% tin and from 3 to 5% thallium.
2. An alloy consisting of 56.3% bismuth, 21.4% lead, 17.4% tin and 4.9% thallium.
3. An alloy consisting of 60.3% bismuth, 19.4% lead, 17.3% tin and 3.0% thallium.
OSCAR N. CARLSON. HARLEY A. WILHELM.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 2,117,282 Austin May 17, 1938 FOREIGN PATENTS Number Country Date 37,913 Norway Sept. 24, 1923

Claims (1)

1. AN ALLOY CONSISTING SUBSTANTIALLY OF FROM 55 TO 65% BISMUTH, FROM 19 TO 22% LEAD, FROM 17 TO 18% TIN AND FROM 3 TO 5% THALLIUM.
US132796A 1949-12-13 1949-12-13 Quaternary bismuth alloy Expired - Lifetime US2595924A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100219660A1 (en) * 2003-07-31 2010-09-02 Lippert Components, Inc. Strap Bed Lift

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2117282A (en) * 1935-09-17 1938-05-17 Frederick D Austin Fuse substance and art of producing same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2117282A (en) * 1935-09-17 1938-05-17 Frederick D Austin Fuse substance and art of producing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100219660A1 (en) * 2003-07-31 2010-09-02 Lippert Components, Inc. Strap Bed Lift

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