TY - JOUR
T1 - Casting platinum jewellery alloys
AU - Miller, Duncan
AU - Keraan, Tauriq
AU - Park-Ross, Penny
AU - Husemeyer, Victoria
AU - Brey, Ali
AU - Khan, Irshad
AU - Lang, Candy
PY - 2005/10
Y1 - 2005/10
N2 - Comparisons are made between platinum-copper and platinum-ruthenium alloys used for jewellery to evaluate the effects of casting variables. The effects of flask temperatures, investments, and centrifugal speeds on microstructure, percentage fill, and porosity were examined over a range of temperatures. Optimum conditions and materials for successful casting of high quality platinum jewellery alloys, using a Hot Platinum induction melting and casting machine, are described. Suitable choice of investment materials and rotational speeds produced good grid fills with Pt-5%Cu and Pt-5%Ru alloys. Metal porosity was more difficult to control, due to the inherently chaotic nature of the casting process, but casting into a relatively cool mould minimised the probability of bad porosity for both alloys. Pt-5%Ru was found to be successful as a casting alloy when used with induction melting technology. It displayed superior uniformity, hardness and colour, compared with cast Pt-5%Cu alloy.
AB - Comparisons are made between platinum-copper and platinum-ruthenium alloys used for jewellery to evaluate the effects of casting variables. The effects of flask temperatures, investments, and centrifugal speeds on microstructure, percentage fill, and porosity were examined over a range of temperatures. Optimum conditions and materials for successful casting of high quality platinum jewellery alloys, using a Hot Platinum induction melting and casting machine, are described. Suitable choice of investment materials and rotational speeds produced good grid fills with Pt-5%Cu and Pt-5%Ru alloys. Metal porosity was more difficult to control, due to the inherently chaotic nature of the casting process, but casting into a relatively cool mould minimised the probability of bad porosity for both alloys. Pt-5%Ru was found to be successful as a casting alloy when used with induction melting technology. It displayed superior uniformity, hardness and colour, compared with cast Pt-5%Cu alloy.
UR - http://www.scopus.com/inward/record.url?scp=27744492442&partnerID=8YFLogxK
U2 - 10.1595/147106705X70273
DO - 10.1595/147106705X70273
M3 - Article
AN - SCOPUS:27744492442
SN - 1471-0676
VL - 49
SP - 174
EP - 182
JO - Platinum Metals Review
JF - Platinum Metals Review
IS - 4
ER -