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https://www.technology.matthey.com/article/49/1/2-15/
17 rows · A patent on hard Pt alloys for jewellery application states the hard, high-purity Pt alloy ...
https://www.technology.matthey.com/wp-content/uploads/pdf/2-15-pmr-jan05.pdf
DOI: 10.1595/147106705X24409 The Hardening of Platinum Alloys for Potential Jewellery Application Pure platinum (Pt) is generally too soft (HV ~ 60) to be used for fabricating jewellery, so alloying additions are made to increase the hardness. Platinum jewellery alloys usually have platinum contents of 90 wt.% and higher.
https://www.ingentaconnect.com/content/matthey/pmr/2005/00000049/00000001/art00001
Jan 01, 2005 · In order to identify platinum alloys suitable for hardening, platinum with different alloying additions was studied. Platinum alloys with additions of less than 7 wt.% of Ag, Au, Cu, Co, Cr, Fe, Ga, Ge, In, Mg, Mn, Mo, Ni, Si, Sn, Ta, Ti, V, W or Zr were examined, and the merits of each system were assessed for commercial viability.
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.136.8654
BibTeX @MISC{Biggs05contentsthe, author = {T. Biggs and S. S. Taylor and E. Van Der Lingen and Reviewed Donald and S. Cameron}, title = {Contents The Hardening of Platinum Alloys for Potential Jewellery 2 Application}, year = {2005}}
https://core.ac.uk/display/20994540
Contents The Hardening of Platinum Alloys for Potential Jewellery 2 Application By T. Biggs, S. S. Taylor, E. Van Der Lingen, Reviewed Donald and S. Cameron Year: 2005
https://www.sciencedirect.com/science/article/pii/S0925838815011767
Oct 05, 2015 · Microalloys of platinum containing 0.3 or 0.5 wt% titanium (Pt–0.3Ti and Pt–0.5Ti, respectively) were studied to determine their solid solution hardening, age hardening, work hardening, and annealing softening behavior. The obtained results revealed that the solid solution hardening and work hardening effects are both quite significant.
https://www.freepatentsonline.com/5846352.html
Nov 22, 1996 · The invention also relates to a method for making a jewelry component, which comprises formulating one of the platinum alloys described above, heat-treating the alloy to-provide a Vickers hardness of at least about 300 or to at least increase the initial Vickers hardness of the alloy by about 25%, and then utilizing the heat-treated alloy as a component of jewelry.
https://link.springer.com/article/10.1111/j.1747-1567.2006.00084.x
Nov 29, 2017 · “The Hardening of Platinum Alloys for Potential Jewellery Application,” Platinum Metals Review 49(1):2–15 (2005). Article Google Scholar 3. Jackson, K.M., and Lang, C., “Mechanical Properties Data for Pt-5 wt. % Cu and Pt-5 wt. % Ru Alloys,” Platinum Metals Review 50:15–19 (2006).
https://patents.google.com/patent/WO2012150558A1/en
An article made of an alloy of the general formula Pt 1-a-b M a (B 1-x Md x ) b in which i) M stands for one or a mixture of metallic element(s) of the group Zr, Ti, Fe, Ni, Co, Cu, Pd, Ag, Al; ii) Md stands for one or a mixture of several metalloids of the group Si, P, C, S, As, Ge; iii) a is smaller than 0.2; iv) b is comprised between 0.2 and 0.5; v) x is comprised between 0 and 0.8; vi ...
https://en.wikipedia.org/wiki/Platinum-iridium_alloy
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.
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