Precious-metal-base advanced materials

The precious metals are basically known for their applications in jewelry, coins, bullions and catalysis. The reality is thas prcdous- 3tals constitute also the base of several advanced materials used in the industry in hundreds of metric tom. Since forties, platinum alloys have been used as structural materials for quipments in the glass industry. The essential reason for this is the excellent resistance of platinum doys to oxidation and elcmolytical corrosion in molten glasses at temperatures as high as l2fX-LWC. The major drawback is a weak creep resistance. In the case of all conventional platinum alloys, the 100 h aeep resistance at 1lWC is smallu than 10 h4F'a while the s t rw to cause rupture in 1000 h at 1100°C for superalloys is about 100 MPa The unique way for significant improvement of platinum base mate & aeep resistance is a strengthening by an oxide dispersion (011s). In the cas of CLAL's patented 'Plativef materials, 0.05 wt % of Y * is incorporated within the alloy matrix by the flame spraying process. The aeep behaviour of such ODs materials shows a 100 times creep rate reduction comparing to conventional platinum alloys. Th & to the fact that the mean size of oxide particles is included between 2000 and 4000 A, the obtained materials don't exihiiit any loss of plastiaty in comparison of conventional Pt alloys. Further improvement o