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Abrasion and reciprocating wear of hardmetals and ceramics.

Gee, M G; Gant, A; Byrne, W P; Roebuck, B (1999) Abrasion and reciprocating wear of hardmetals and ceramics. NPL Report. CMMT(A)166

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This report describes the results of three different wear tests that were performed on a range of hardmetal and ceramic materials. Two abrasion tests and one sliding (reciprocating) test were employed.
The ASTM B611 steel wheel test gave a singular relationship between wear volume and hardness for the hardmetal samples. This relationship held for hardmetals with differing binder phase compositions and volume fractions. Using silica abrasive instead of the normal alumina abrasive gave wear volumes about an order of magnitude lower, but with a very similar relationship. Ceramics gave higher wear rates than hardmetals with the same hardness.
Modified ASTM G65 tests with silica abrasive also showed a reduction in wear with an increase in hardmetal hardness. Tests were carried out with a wet rubber wheel, a dry rubber wheel and a wet steel wheel. Wear increased in the order wet rubber>dry rubber>wet steel. Ceramics again gave higher wear rates than hardmetals.
In the reciprocating tests there was only a small amount of wear. The friction coefficient for the tests at 40 N was about 0.25, and decreased slightly with increase in hardness for the hardmetals.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMMT(A)166
Subjects: Advanced Materials
Advanced Materials > Powder Route Materials
Last Modified: 02 Feb 2018 13:18
URI: http://eprintspublications.npl.co.uk/id/eprint/1132

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