Newly Developed Friction Tester for in situ Soft X-Ray Absorption Measurements of Frictional Engine-Oil/Metals Interfaces

Yasuji MURAMATSU; Masaru OKUYAMA; Naoko TAKAHASHI; Toshihide OHMORI; Eric M. GULLIKSON

doi:10.2116/analsci.33.1465

Advancements in Instrumentation

Newly Developed Friction Tester for in situ Soft X-Ray Absorption Measurements of Frictional Engine-Oil/Metals Interfaces

Yasuji MURAMATSU, Masaru OKUYAMA, Naoko TAKAHASHI, Toshihide OHMORI, Eric M. GULLIKSON

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Keywords: Synchrotron radiation, soft X-ray absorption spectroscopy, friction, tribology

JOURNAL FREE ACCESS

2017 Volume 33 Issue 12 Pages 1465-1468

DOI https://doi.org/10.2116/analsci.33.1465

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Abstract

A novel friction tester has been developed to clarify the friction mechanism between engine oil and metals by in situ/operando measurements of the X-ray absorption near edge structure (XANES) using the total electron yield (TEY) method. The tester can perform frictional motion with engine oil and metals in a vacuum chamber under a vacuum of 10⁻⁷ Torr during TEY-XANES measurements in BL-6.3.2 at the Advanced Light Source (ALS). From in situ XANES measurements in the C K and Fe L regions, the organic molecule layers at the oil/metals interfaces have been successfully observed.

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