It is a platinum-based binary alloy containing iridium, which is a continuous solid solution at high temperature. The solid phase decomposition occurs when the temperature reaches 975 ~ 700℃, but the phase equilibrium process is very slow. Iridium is volatile and oxidized and can significantly improve the corrosion resistance of platinum. There are Ptlrl0, Ptlr17.5, Ptlr25, Ptlr30 and other alloys with high hardness, high melting point, high corrosion resistance and low contact resistance. The chemical corrosion rate was 58% of pure platinum, and the oxidation weight loss was 2.8mg/g. Shielded by argon in an induction furnace, the ingot must be hot-unrolled before cold working, and the 0.008 MMP-TIR25 alloy filaments have been pulled. Alloys containing up to 60% iridium are smelted and processed in an arc furnace. It is a classic electrical contact material, used for ignition contacts of aero-engines, high sensitivity relays and electrical contacts of micromotors. Potentiometers and conducting rings and brushes for precision sensors such as aircraft, missiles and gyroscopes. Thermocouple materials, thick film resistors, hairspring for precision instruments, standard resistors and weights, dental materials and injection needles. Precious metal brush material.
Precious metal brush materials: gold alloy (Au), silver alloy (Ag), platinum alloy (Pt), palladium alloy (Pd), rhodium alloy (Rh), iridium alloy (Ir) and other specifications and properties of conventional brush wire materials. At the same time for quality customers to provide a very competitive precious metal composite brush wire.
In order to improve the product cost performance of the customer's slip ring system, our company has launched a series of noble metal composite brush wire products with completely independent intellectual property rights. The composite brush wire has high conductivity, good thermal conductivity, high melting point and small resistance temperature coefficient. It is resistant to oxidation, vulcanization and corrosive gases. It has the advantages of adjustable hardness, high elasticity, good wear resistance, etc. Good resistance to fusion welding, arc corrosion and burn. On the premise of meeting customers' requirements, it can significantly reduce customers' raw material procurement cost and save 30%-70% of the cost of brushwire materials.
