BSI 21/30419771 DC:2021 Edition

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BS ISO 4821. Plain bearings. Dynamic adhesion test method for DLC coated parts under lubricated condition

Published By	Publication Date	Number of Pages
BSI	2021	21

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Categories: 21.100.10 - Plain bearings, BSI

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Description

This document specifies a procedure to measure the adhesion strength of diamond like carbon (DLC) coatings specified in ISO 20523 by detecting acoustic emission signals using ball-on-disk method under the lubricated condition. DLC is normally coated on metal or ceramic.

The test results are not applicable when the DLC coated parts operate in an unlubricated environment.

The positioning of this test method in the process of parts evaluation performed by automobile manufacturers is shown in Annex A, and the correlation between results obtained by the test method specified in this document and results obtained by the test method using conventional engine parts is described in Annex B.

Additional information

Status	Definitive
Pages	21
Publication Date	2021-05-11
Standard Number	21/30419771 DC
Title	BS ISO 4821. Plain bearings. Dynamic adhesion test method for DLC coated parts under lubricated condition
Identical National Standard Of	ISO/DIS 4821
Descriptors	Bearings, Plain bearings, Surface properties, Adhesion, Lubricating system components, Mechanical components
Publisher	BSI
Committee	MCE/12
ICS Codes	21.100.10 - Plain bearings

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BSI 21/30419771 DC:2021 Edition

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