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Newly Developed Friction Tester for in situ Soft X-Ray Absorption Measurements of Frictional Engine-Oil/Metals
Yasuji Muramatsu1, Masaru Okuyama2, Naoko Takahashi2
1Graduate School of Engineering, University of Hyogo.
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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