US2074996A - Palladium nickel alloy - Google Patents
Palladium nickel alloy Download PDFInfo
- Publication number
- US2074996A US2074996A US117150A US11715036A US2074996A US 2074996 A US2074996 A US 2074996A US 117150 A US117150 A US 117150A US 11715036 A US11715036 A US 11715036A US 2074996 A US2074996 A US 2074996A
- Authority
- US
- United States
- Prior art keywords
- palladium
- alloy
- nickel
- nickel alloy
- palladium nickel
- 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
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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
- I provide a commercially hard palladium alloy by the addition of the base metal nickel to palladium.
- Nickel is comparatively very cheap and has substantially the same color as palladium.
- -I have 30 found that by proper proportioning of the nickel content, a hard palladium alloy-is produced, having the white appearance of palladium, and being resistant to oxidation and discoloration. 1
- the relatively high fusion point of the palladium-nickel alloy of my invention, together with the white appearance and workability of the metal renders it widely useful.
- the elasticity and springiness of the alloy make it suitable for optical frames and other uses. It is accordingly an object of my present invention to provide a novel alloy of palladium.
- Another object of my present invention is to provide a novel palladium alloy of commercial hardness. 5 A further object of my present invention is to provide a novel palladium alloy hardened by the base metal nickel.
- a still further object of my present invention is to provide a novel palladium nickel alloy go having the appearance of palladium and being resistant to oxidation and tarnishing.
- the alloy has a tendency to crack and can be wofked satisfactorily only when hot. Beyond this percentage of nickel, the alloy begins to present considerable 55 Sixteen per cent nickel may therefore be considered the upper limit of the palladium-nickel composition of this invention.
- Nickel having a color similar to palladium, does not affect the color of the palladium alloy in the proportions used.
- the alloy is cold-rolled to suitable shape in a manner well known in the art and is annealed by heating to a temperature of 800 to 1000" C. and permitted to cool slowly under atmospheric conditions. -In order to prevent the formation of oxide coatings on the palladium alloy, I water quench the alloy.
- P 1 An alloyconsisting of approximately ninetyfive percent palladium and approximatelyv five percent nickel.
Description
Patented Mar. 23,. 1937 UNITED STATES YPATENT OFFICE PALLADIUM NICKEL ALLQY Sidney 001m,- New rm, N. Y., assignor m v Sigmund (John, New York, N. Y.
No Drawing. Application December 22, 1986, Serial No. 117,150
4 Claims. (01. 75-112) by alloying it with costly or rare metals such as:
ruthenium, rhodium, platinum, etc.
In accordance with my present invention, I provide a commercially hard palladium alloy by the addition of the base metal nickel to palladium. Nickel is comparatively very cheap and has substantially the same color as palladium. -I have 30 found that by proper proportioning of the nickel content, a hard palladium alloy-is produced, having the white appearance of palladium, and being resistant to oxidation and discoloration. 1 The relatively high fusion point of the palladium-nickel alloy of my invention, together with the white appearance and workability of the metal, renders it widely useful. The elasticity and springiness of the alloy make it suitable for optical frames and other uses. It is accordingly an object of my present invention to provide a novel alloy of palladium.
Another object of my present invention is to provide a novel palladium alloy of commercial hardness. 5 A further object of my present invention is to provide a novel palladium alloy hardened by the base metal nickel.
A still further object of my present invention is to provide a novel palladium nickel alloy go having the appearance of palladium and being resistant to oxidation and tarnishing.-
Other objects and advantages of my present invention will be evident from the following description.
5 I have discovered that by alloying palladium with four to sixper cent of nickel produces the qualities in palladium hereinabove described. In practice, I have found that as the percentage of nickel content is increased up tosixteen per cent, 5othehardnessrisesrapidly. 1
- At sixteen per cent nickel. the alloy' has a tendency to crack and can be wofked satisfactorily only when hot. Beyond this percentage of nickel, the alloy begins to present considerable 55 Sixteen per cent nickel may therefore be considered the upper limit of the palladium-nickel composition of this invention. Nickel, having a color similar to palladium, does not affect the color of the palladium alloy in the proportions used. The alloy is cold-rolled to suitable shape in a manner well known in the art and is annealed by heating to a temperature of 800 to 1000" C. and permitted to cool slowly under atmospheric conditions. -In order to prevent the formation of oxide coatings on the palladium alloy, I water quench the alloy.
I have found that the addition of a small quan tity of flux when the alloy is first prepared from its elementary constituents, prevents the formation of nickel oxide. This is important, inasmuch as nickel oxide inclinm the alloy to be brittle.
After the nickel has been melted in the palladium,
the standard technique as used in melting pure palladium can be followed ingof the alloy. I
Rockwell'hardness measurements on pure palladium using the B scale range from -40 to -50.
Similar hardness measurements on the palladiumfour per cent nickel alloy of my present invention showed +30 to measurements on'the palladium-five per cent nickel composition yielding +53 to +55; six per cent yieldin for subsequent melt- The resultant palladium-nickel alloy has the l white appearance of-palladiumand suitable commercial hardness for jewelry, watch-cases, rings and the like, serving as a good and economical substitute for. white gold and/or platinum. This alloy is resistant .to oxidation, acids, and dis-' malleability and workability of the alloy renders it, as stated, suitable for a wide variety of uses and produces a springiness' or elasticity and malleability making it useful for jewelry generally.
' I claim: I
P 1. An alloyconsisting of approximately ninetyfive percent palladium and approximatelyv five percent nickel.
2.- An alloy constituted principally of pailadium, ninety-seven to ninety two percent having a corresponding nickel content of three to eight percent.
3. Analloycomposed of and nickel having from five to sixteen percent nickel content. 4. An alloy constitutedprlncipally of palladium of approximately ninety-five percent, hardened with nickel to a Rockwell-hardness of the-order'of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US117150A US2074996A (en) | 1936-12-22 | 1936-12-22 | Palladium nickel alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US117150A US2074996A (en) | 1936-12-22 | 1936-12-22 | Palladium nickel alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2074996A true US2074996A (en) | 1937-03-23 |
Family
ID=22371213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US117150A Expired - Lifetime US2074996A (en) | 1936-12-22 | 1936-12-22 | Palladium nickel alloy |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2074996A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2793423A (en) * | 1954-04-19 | 1957-05-28 | Baker & Co Inc | Compound metal stock |
| US4261744A (en) * | 1979-10-10 | 1981-04-14 | Boyajian Ben K | Palladium-based dental alloy containing indium and tin |
| US4319877A (en) * | 1979-10-10 | 1982-03-16 | Boyajian Benjamin K | Palladium-based dental alloy containing indium and tin |
| WO2013085420A1 (en) * | 2011-12-06 | 2013-06-13 | Kostin Sergey Alexeevich | Palladium-based alloy and method for hardening palladium alloys used for the manufacture of items of jewellery |
-
1936
- 1936-12-22 US US117150A patent/US2074996A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2793423A (en) * | 1954-04-19 | 1957-05-28 | Baker & Co Inc | Compound metal stock |
| US4261744A (en) * | 1979-10-10 | 1981-04-14 | Boyajian Ben K | Palladium-based dental alloy containing indium and tin |
| US4319877A (en) * | 1979-10-10 | 1982-03-16 | Boyajian Benjamin K | Palladium-based dental alloy containing indium and tin |
| WO2013085420A1 (en) * | 2011-12-06 | 2013-06-13 | Kostin Sergey Alexeevich | Palladium-based alloy and method for hardening palladium alloys used for the manufacture of items of jewellery |
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