Joint effect of surface microtopography and near-surface structure on microcontact conditions

progress report for period June-August 1988.

J. I. McCool, B. G. Bunting

Research output: Contribution to journalArticle

Abstract

A database of roughness measurements has been compiled for the ceramic test specimens to be wear tested in this program. The computation of the equivalent isotropic RMS profile slope is discussed and numerical values are given. Wear tests performed on alumina, silicon nitride and silicon carbide at ORNL show significant differences in wear coefficient due to both material and finish. Acoustic emission readings reflective of variations in the porosity and/or elastic modulus at near surface layers were performed on three differently finished silicon nitride flats, at the Argonne National Laboratory. The within specimen variability is believed to indicate real differences from location to location within a specimen. An alternative procedure for characterizing variations in elastic modulus using a nano-indenter is discussed.

Original languageEnglish (US)
Journal[No source information available]
StatePublished - 1988

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Surface structure
Wear of materials
Silicon nitride
Elastic moduli
Roughness measurement
Acoustic emissions
Silicon carbide
Alumina
Porosity

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "A database of roughness measurements has been compiled for the ceramic test specimens to be wear tested in this program. The computation of the equivalent isotropic RMS profile slope is discussed and numerical values are given. Wear tests performed on alumina, silicon nitride and silicon carbide at ORNL show significant differences in wear coefficient due to both material and finish. Acoustic emission readings reflective of variations in the porosity and/or elastic modulus at near surface layers were performed on three differently finished silicon nitride flats, at the Argonne National Laboratory. The within specimen variability is believed to indicate real differences from location to location within a specimen. An alternative procedure for characterizing variations in elastic modulus using a nano-indenter is discussed.",
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AB - A database of roughness measurements has been compiled for the ceramic test specimens to be wear tested in this program. The computation of the equivalent isotropic RMS profile slope is discussed and numerical values are given. Wear tests performed on alumina, silicon nitride and silicon carbide at ORNL show significant differences in wear coefficient due to both material and finish. Acoustic emission readings reflective of variations in the porosity and/or elastic modulus at near surface layers were performed on three differently finished silicon nitride flats, at the Argonne National Laboratory. The within specimen variability is believed to indicate real differences from location to location within a specimen. An alternative procedure for characterizing variations in elastic modulus using a nano-indenter is discussed.

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