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New Design for Multi-purpose Tribological Specimens

IP.com Disclosure Number: IPCOM000060099D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Lee, EJ: AUTHOR

Abstract

The current design of lab specimens for tribological study utilizes a raw material in cylindrical form to produce a spherical contact surface. Due to the configuration of the cylindrical sample, supplementary technical information that is important in the analysis of tribological tests is not obtainable. A new design, having flat, polished surfaces on cylindrical sample, allows the measurement of critical information such as hardness of any coating, coating thickne adhesion of coating to its substrate, cohesion of the coating and chemical composition of the coating surface.

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New Design for Multi-purpose Tribological Specimens

The current design of lab specimens for tribological study utilizes a raw material in cylindrical form to produce a spherical contact surface. Due to the configuration of the cylindrical sample, supplementary technical information that is important in the analysis of tribological tests is not obtainable. A new design, having flat, polished surfaces on cylindrical sample, allows the measurement of critical information such as hardness of any coating, coating thickne adhesion of coating to its substrate, cohesion of the coating and chemical composition of the coating surface.

The current design is made from a cylindrical rod (Fig. 1) and fashioned with a dome (Fig. 2) for a contact surface. The new design has at least two flat surfaces (Fig. 3). One of the flat sides is polished for use in microhardness measurement, thickness determination and adhesion test. The other surfaces have smooth surfaces. The contact surface of the dome has a V4 finish.

The design also provides sharp corners for accurate locating positioning for the tracing of a profilometer to obtain accurate profiles of the dome before and after wear testing. The design also provides an accurate orientation for the specimen in a wear test.

Disclosed anonymously.

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