Noble Metal Alloys as Strain Gauge Materials

The development of materials which contain the noble metals for use in high temperature strain gauges is reviewed, with particular emphasis being placed upon work done by the Institute of Precious Metals, in China. Three alloy systems displaying excellent resistance to oxidation and good overall properties when used in high temperature strain gauges, are singled out for examination. These are platinum-tungsten-rhenium-nickel-chromium-yttrium, gold-palladium-chromium-platinum-iron-aluminium-yttrium and palladium-chromium. Their development and the suitability of these alloys for use in measuring high temperature static strain are discussed.