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Gold Bulletin

, Volume 35, Issue 3, pp 75–81

Received: 13 April 2002


A new gold alloy NSCGA was designed and prepared for light duty precision contacts. The microstructure, mechanical, electrical and applied properties of the NSCGA alloy were studied. The NSCGA alloy contains copper, palladium, platinum, nickel and rhodium as well as gold. The unique structure comprised of two phases, a gold-rich solid solution as the matrix and a platinum-rich solid solution as a strengthening phase. The matrix presents short-range ordering in the temperature range 200-900°C, which leads to the specific resistance of the alloy decreasing, and a modulated structure at low temperatures, which is responsible for age strengthening. The NSCGA alloy has low specific resistance, high tensile strength and high Vickers hardness. Various TO-5 type relays TO-5 relay is a sealed mini relay with magnetic preservation with NSCGA alloy as contacts were prepared and tested in a special relay factory under industrial conditions. NSCGA alloy contacts showed stable and low contact resistance, long loading life and high reliability, superior to that of an available conventional sixcomponent palladium alloy. The NSCGA alloy and the composites with NSCGA alloy as a covering layer and copper alloys as a base have been evaluated in various TO-5 type mini relays and other electric products.

Professor Yuantao Ning is a Research Fellow at the Kunming Precious Metals Institute in China, working on a variety of research projects related to alloying principles and new materials based on precious metals. He has gained considerable scientific achievements and published about two hundred papers in international and domestic academic periodicals. He has been awarded national prizes for his achievements in scientific research. His work has also been concerned with research into applications for gold and its alloys.

Mrs Ying Peng is a senior engineer in QY radio factory. She has been engaged in design, fabrication and testing of radio components and relays. She has been awarded national prizes for her research achievements

Mrs Hong Dai is a senior engineer in Kunming Institute of Precious Metals for research of new materials based on precious metals. She has published several papers and has been awarded national prizes.

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Autor: Yuantao Ning - Ying Peng - Hong Dai

Fuente: https://link.springer.com/

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