US2303404A - Alloy - Google Patents

Alloy Download PDF

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Publication number
US2303404A
US2303404A US423793A US42379341A US2303404A US 2303404 A US2303404 A US 2303404A US 423793 A US423793 A US 423793A US 42379341 A US42379341 A US 42379341A US 2303404 A US2303404 A US 2303404A
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US
United States
Prior art keywords
iridium
ruthenium
palladium
alloys
alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US423793A
Inventor
Sivil Cecil Spencer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker and Co Inc
Original Assignee
Baker and Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker and Co Inc filed Critical Baker and Co Inc
Priority to US423793A priority Critical patent/US2303404A/en
Priority to US446383A priority patent/US2303405A/en
Application granted granted Critical
Publication of US2303404A publication Critical patent/US2303404A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/04—Alloys based on a platinum group metal

Definitions

  • the alloys according to my invention comprise palladium, ruthenium, and iridium.
  • the palladium content may be as low as about 60% and as high as about 95%, the ruthenium content being as low as 0.5% and as high as about 20%, whereas the iridium content comprises at least 2.5% of the whole alloy.
  • the ruthenium content lies between about 1%? and a maximum of about
  • the alloys consist entirely of palladium, ruthenium, and iridium in the proportions specified herein, although, of course, minor quantities of other metals may be present so long as they do not substantially afl'ect the beneficial properties and characteris tics of my alloys.
  • alloys within the limits of 80% to as;% palladium, 1% to 10% ruthenium, and 2.5% to 10% iridium, such as alloys of 80% palladium 10% ruthenium and 10% iridium, or of 90% palladium 5% ruthenium and 5% iridium.
  • alloys comprising palladium, ruthenium and iridium may also contain advantageously a substantial content of rhodium, such as from 2.5% to 37% rhodium, in which case the maximum palladium content will be 94.5% and the maximum-iridium content will be 37%, such as alloys of 80% palladium 5% ruthenium 5% iridium and 10% rhodium, or 01 90% palladium 2.5% ruthenium 2.5% iridium and 5% rhodium.
  • rhodium such as from 2.5% to 37% rhodium, in which case the maximum palladium content will be 94.5% and the maximum-iridium content will be 37%, such as alloys of 80% palladium 5% ruthenium 5% iridium and 10% rhodium, or 01 90% palladium 2.5% ruthenium 2.5% iridium and 5% rhodium.
  • I may state that an alloy of 80% palladium 5% ruthenium 10% rhodium and 5% iridium has a tensile strength of 133,900 lbs. per square inch when hard, and of 94,200 lbs. per square inchwhen annealed, and an elongation of 27% on 2-inches when annealed. trical resistivity of 200 ohms/mil ft.
  • An alloy of palladium, ruthenium and iridium comprising to about 95% palladium, 0.5% to 20% ruthenium, and 2.5% to 39.5% iridium.
  • An alloy of palladium, ruthenium and iridium comprising to 96.5% palladium, 1% to 10% ruthenium, and 2.5% to 10% iridium.
  • An alloy of palladium, ruthenium and iridium comprising about palladium, about 5% ruthenium, and about 5% iridium.
  • the alloy likewise, possesses an elec-

Description

Patented Dec. 1, 1942 UNITED STATES PATENT OFFICE ALLOY Cecil Spencer Sivil, Roselle, N. 1.. assignor to Baker & Company, Inc
ration of New Jersey Application December 20, 1941, Serial No. 423,793
No Drawing.
., Newark, N. 3., a corpo-.
3 Claims. (Cl. 75-172) alloys of great electflcalresistance. It is a further object of my invention to provide suchalloys of low specific gravity and low cost.
This applicationis a continuation in part of my application Serial-No. 401,653 filed July 9, 1941, which in turnis a continuation in part of my application Serial No. 378,376, ,flled February 11, 1941.
The alloys according to my invention comprise palladium, ruthenium, and iridium. In such alloys the palladium content may be as low as about 60% and as high as about 95%, the ruthenium content being as low as 0.5% and as high as about 20%, whereas the iridium content comprises at least 2.5% of the whole alloy. I prefer alloys wherein the ruthenium content lies between about 1%? and a maximum of about In its best embodiments the alloys consist entirely of palladium, ruthenium, and iridium in the proportions specified herein, although, of course, minor quantities of other metals may be present so long as they do not substantially afl'ect the beneficial properties and characteris tics of my alloys.
Particularly advantageous are alloys within the limits of 80% to as;% palladium, 1% to 10% ruthenium, and 2.5% to 10% iridium, such as alloys of 80% palladium 10% ruthenium and 10% iridium, or of 90% palladium 5% ruthenium and 5% iridium. Likewise, alloys comprising palladium, ruthenium and iridium, according to my invention, may also contain advantageously a substantial content of rhodium, such as from 2.5% to 37% rhodium, in which case the maximum palladium content will be 94.5% and the maximum-iridium content will be 37%, such as alloys of 80% palladium 5% ruthenium 5% iridium and 10% rhodium, or 01 90% palladium 2.5% ruthenium 2.5% iridium and 5% rhodium. In order to illustrate the properties of the alloys according to this invention, I may state that an alloy of 80% palladium 5% ruthenium 10% rhodium and 5% iridium has a tensile strength of 133,900 lbs. per square inch when hard, and of 94,200 lbs. per square inchwhen annealed, and an elongation of 27% on 2-inches when annealed. trical resistivity of 200 ohms/mil ft.
What I claim is:
1. An alloy of palladium, ruthenium and iridium comprising to about 95% palladium, 0.5% to 20% ruthenium, and 2.5% to 39.5% iridium.
2. An alloy of palladium, ruthenium and iridium comprising to 96.5% palladium, 1% to 10% ruthenium, and 2.5% to 10% iridium.
3. An alloy of palladium, ruthenium and iridium comprising about palladium, about 5% ruthenium, and about 5% iridium.
CECIL S. SIVIL.
The alloy, likewise, possesses an elec-
US423793A 1941-12-20 1941-12-20 Alloy Expired - Lifetime US2303404A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US423793A US2303404A (en) 1941-12-20 1941-12-20 Alloy
US446383A US2303405A (en) 1941-12-20 1942-06-09 Alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US423793A US2303404A (en) 1941-12-20 1941-12-20 Alloy

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US2303404A true US2303404A (en) 1942-12-01

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092212B (en) * 1957-04-20 1960-11-03 Degussa Use of a noble metal alloy as a material for resistors, especially for potentiometer wires
DE1092213B (en) * 1957-04-20 1960-11-03 Degussa Use of a noble metal alloy as a material for resistors, especially for potentiometer wires
DE1758069B1 (en) * 1967-03-28 1971-11-04 Du Pont METALIZING AGENTS AND CONDENSER MADE FROM THEM
US3974001A (en) * 1966-04-22 1976-08-10 Institut Dr. Ing. Reinhard Straumann, A.G. Paramagnetic alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092212B (en) * 1957-04-20 1960-11-03 Degussa Use of a noble metal alloy as a material for resistors, especially for potentiometer wires
DE1092213B (en) * 1957-04-20 1960-11-03 Degussa Use of a noble metal alloy as a material for resistors, especially for potentiometer wires
US3974001A (en) * 1966-04-22 1976-08-10 Institut Dr. Ing. Reinhard Straumann, A.G. Paramagnetic alloy
DE1758069B1 (en) * 1967-03-28 1971-11-04 Du Pont METALIZING AGENTS AND CONDENSER MADE FROM THEM

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