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ISO
ISO 4821:2022

ISO 4821:2022

Plain bearings — Dynamic adhesion test method for DLC coated parts under lubricated condition

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General Information

Status : Active

Standard Type : Main

Document No : ISO 4821:2022

Document Year : 2022

Pages : 13

Edition : 1

Section Volume : Special types of plain bearings (ISO/TC 123/SC 7.)

ICS : Plain bearings (21.100.10)

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.