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METROLOGICAL CHARACTERIZATION OF POLYMERIC BEARINGS AT THE NANOMETER LEVEL
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UNSPECIFIED (1992) METROLOGICAL CHARACTERIZATION OF POLYMERIC BEARINGS AT THE NANOMETER LEVEL. In: INTERNATIONAL CONF ON FRONTIERS OF TRIBOLOGY, CELEBRATING THE 10TH ANNIVERSARY OF THE TRIBOLOGY GROUP OF THE INST OF PHYSICS, STRATFORD AVON, ENGLAND, APR, 1991. Published in: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 25 (1A). A240-A248. ISSN 0022-3727.
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Abstract
The performance of polymeric bearings for metrological applications requiring nanometre-level precision is examined. An initial assessment of lubricated and dry polyacetal and PTFE/Pb composite bearings using a modified stylus measuring instrument is presented. Results of these tests indicate that smooth and repeatable motion of this precision is possible. Reducing the thickness of PTFE in the latter bearing resulted in both a lower stick-slip behaviour and a change in the friction coefficient from approximately 0.31 to 0.09. To further investigate these and other bearings, a dedicated test rig based on capacitance gauging has been produced. Being constructed almost entirely from the low-expansivity glass ceramic 'Zerodur', it has a low thermal susceptibility of 300-600 nm K-1 enabling the monitoring of long-term effects such as creep and wear. The precision gauging has subnanometre precision over a bandwidth of 1 kHz introducing the possibility of measuring transient effects such as film delamination and stick-slip. Initial results, indicating nanometre-level performance with PTFE thin film bearings, are presented.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | JOURNAL OF PHYSICS D-APPLIED PHYSICS | ||||
Publisher: | IOP PUBLISHING LTD | ||||
ISSN: | 0022-3727 | ||||
Official Date: | 14 January 1992 | ||||
Dates: |
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Volume: | 25 | ||||
Number: | 1A | ||||
Number of Pages: | 9 | ||||
Page Range: | A240-A248 | ||||
Publication Status: | Published | ||||
Title of Event: | INTERNATIONAL CONF ON FRONTIERS OF TRIBOLOGY, CELEBRATING THE 10TH ANNIVERSARY OF THE TRIBOLOGY GROUP OF THE INST OF PHYSICS | ||||
Location of Event: | STRATFORD AVON, ENGLAND | ||||
Date(s) of Event: | APR, 1991 |
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