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- Platinum-iridium_alloy abstract "Platinum-iridium alloys are alloys of the platinum group precious metals platinum and iridium.Typical alloy proportions are 90:10 or 70:30 (Pt:Ir). These have the chemical stability of platinum, but increased hardness. The Vickers hardness of pure platinum is 56 HV while platinum with 50% of iridium can reach over 500 HV. This improved hardness has also been considered as beneficial for use in platinum jewellery, particularly watch cases.Owing to their high cost, these alloys are rarely used. They have been used for spinnerets in the manufacture of synthetic fibres.Their well-known use is in metrology, where they are used to make the international prototype measures used by international standards bodies for mass standards such as the international prototype kilogram and the international prototype metre, although the latter has now been superseded by a standard based on the vacuum speed of light.The other extremely widespread use for Pt/Ir alloy is fabrication of metal microelectrodes for electrical stimulation of nervous tissue and electrophysiological recordings. Pt/Ir alloy has an optimal combination of mechanical and electrochemical properties for this application. Pure iridium is very difficult to pull into small diameter wires; at the same time, platinum has a low Young's modulus which makes pure platinum wires bend easily during the insertion in nervous tissue.".
- Platinum-iridium_alloy wikiPageID "38940991".
- Platinum-iridium_alloy wikiPageLength "3824".
- Platinum-iridium_alloy wikiPageOutDegree "13".
- Platinum-iridium_alloy wikiPageRevisionID "675197511".
- Platinum-iridium_alloy wikiPageWikiLink Category:Alloys.
- Platinum-iridium_alloy wikiPageWikiLink Category:Iridium.
- Platinum-iridium_alloy wikiPageWikiLink Category:Platinum.
- Platinum-iridium_alloy wikiPageWikiLink History_of_the_metre.
- Platinum-iridium_alloy wikiPageWikiLink Iridium.
- Platinum-iridium_alloy wikiPageWikiLink Kilogram.
- Platinum-iridium_alloy wikiPageWikiLink Metrology.
- Platinum-iridium_alloy wikiPageWikiLink Platinum.
- Platinum-iridium_alloy wikiPageWikiLink Platinum_group.
- Platinum-iridium_alloy wikiPageWikiLink Platinum_jewellery.
- Platinum-iridium_alloy wikiPageWikiLink Spinneret_(polymers).
- Platinum-iridium_alloy wikiPageWikiLink Synthetic_fiber.
- Platinum-iridium_alloy wikiPageWikiLink Vickers_hardness_test.
- Platinum-iridium_alloy wikiPageWikiLinkText "Platinum-iridium alloy".
- Platinum-iridium_alloy wikiPageWikiLinkText "platinum-iridium alloy".
- Platinum-iridium_alloy wikiPageWikiLinkText "platinum-iridium".
- Platinum-iridium_alloy wikiPageUsesTemplate Template:Reflist.
- Platinum-iridium_alloy subject Category:Alloys.
- Platinum-iridium_alloy subject Category:Iridium.
- Platinum-iridium_alloy subject Category:Platinum.
- Platinum-iridium_alloy hypernym Alloys.
- Platinum-iridium_alloy type ChemicalCompound.
- Platinum-iridium_alloy type Element.
- Platinum-iridium_alloy comment "Platinum-iridium alloys are alloys of the platinum group precious metals platinum and iridium.Typical alloy proportions are 90:10 or 70:30 (Pt:Ir). These have the chemical stability of platinum, but increased hardness. The Vickers hardness of pure platinum is 56 HV while platinum with 50% of iridium can reach over 500 HV. This improved hardness has also been considered as beneficial for use in platinum jewellery, particularly watch cases.Owing to their high cost, these alloys are rarely used.".
- Platinum-iridium_alloy label "Platinum-iridium alloy".
- Platinum-iridium_alloy sameAs Q4364570.
- Platinum-iridium_alloy sameAs m.0s8txt1.
- Platinum-iridium_alloy sameAs Платиноиридиевый_сплав.
- Platinum-iridium_alloy sameAs Q4364570.
- Platinum-iridium_alloy wasDerivedFrom Platinum-iridium_alloy?oldid=675197511.
- Platinum-iridium_alloy isPrimaryTopicOf Platinum-iridium_alloy.