Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 21    Special 1    March 2011

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Lubrication properties of silver-palladium alloy prepared by
 ion plating method for high temperature stud bolt
Jung-Dae KWON1, Sunghun LEE1, Koo-Hyun LEE1, Jong-Joo RHA1, Kee-Seok NAN1, Se-Hun KWON2

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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