中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 21 Special 1 March 2011 |
ion plating method for high temperature stud bolt
（1. Materials Processing Division, Korea Institute of Materials Science, Changwon, Gyeongnam 641-831, Korea;
2. National Core Research Center for Hybrid Materials Solution, Pusan National University, Busan 609-735, Korea）
Abstract:As a solid lubricant, silver-palladium (Ag-Pd) alloy coating was investigated for the application to high temperature stud bolt. A glue layer nickel (Ni) film was deposited on the surface of the hex bolt sample and then Ag-Pd alloy coating was performed on it using ion plating method. The friction coefficient of Ag-Pd alloy film coated bolt was lower than that of N-5000 oil coated bolt by the result of axial force measurement. The cyclic test of heat treatment was conducted to evaluate the durability of Ag-Pd alloy film coated bolt. In a cycle, sample was assembled into the block using torque wrench, followed by heating and disassembling. It was not successful to disassemble the N-5000 oil coated bolt from the block after only one cycle. However, the Ag-Pd alloy film coated bolt was able to be disassembled softly till 12 cycles.
Key words: solid lubricant; silver-palladium alloy; ion plating
