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TECHNICAL PAPERS

Tribological Properties and Gear Performance of Polyoxymethylene Composites

[+] Author and Article Information
Masaya Kurokawa

Graduate School of Natural Science and Technology, Kanazawa University, 40-20, Kodatsuno 2-chome, Kanazawa-shi, Ishikawa 920-8667, Japan

Yoshitaka Uchiyama

Department of Mechanical Systems Engineering, Kanazawa University, 40-20, Kodatsuno 2-chome, Kanazawa-shi, Ishikawa 920-8667, Japan

Susumu Nagai

Tribosystem Laboratory Starlite Co. Ltd., 1-1-71 Tokuan, Tsurumi-ku, Osaka 538-0034, Japan

J. Tribol 122(4), 809-814 (Mar 01, 2000) (6 pages) doi:10.1115/1.1288773 History: Received October 05, 1999; Revised March 01, 2000
Copyright © 2000 by ASME
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References

Figures

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Injection molded pin specimen (a) and izod impact test specimen (b). (dimensions in mm)
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Geometry and specification of spur gear. Module=1.0, pressure angle=20 deg, NTeeth=30, face width=8 mm.
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Schematic view of the pin-on-disk wear apparatus
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Gear performance test apparatus
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Low magnification polarized micrographs of the skin area of unfilled POM and POM composites: (a) unfilled POM; (b) POM/SiC(0.1); (c) POM/SiC(1); (d) POM/SiC(0.1)/Ca-OCA(1).
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Low magnification polarized micrographs of the core area of unfilled POM and POM composites: (a) unfilled POM; (b) POM/SiC(0.1); (c) POM/SiC(1); (d) POM/SiC(0.1)/Ca-OCA(1).
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Changes in the spherulite size of POM/SiC(0, 0.1, 1)/Ca-OCA composites on the core area as a function of Ca-OCA content: SiC 0 wt.% (○); SiC 0.1 wt.% (□); SiC 1 wt.% (▵).
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Variations in the coefficient of friction with sliding distance for POM/Ca-OCA (0, 0.25, 0.5, 1) composites. Contact pressure=0.7 MPa; sliding velocity=0.5 m/s; room temperature; dry condition.
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Variations in wear depth with sliding distance for POM/Ca-OCA (0, 0.25, 0.5, 1) composites. Contact pressure=0.7 MPa; sliding velocity=0.5 m/s; room temperature; dry condition.
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Changes in the coefficient of friction (○) and specific wear rate (□) for POM/SiC(0.1)/Ca-OCA composites as a function of Ca-OCA content. The maximum and minimum value, respectively, obtained from measurements of five specimens were plotted. Contact pressure=0.7 MPa; sliding velocity=0.5 m/s; room temperature; dry condition.
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Changes in the coefficient of friction (○) and specific wear rate (□) for POM/SiC(1)/Ca-OCA composites as a function of Ca-OCA content. The maximum and minimum value, respectively, obtained from measurements of five specimens were plotted. Contact pressure=0.7 MPa; sliding velocity=0.5 m/s; room temperature; dry condition.
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Variations in the coefficient of friction (○) and the specific wear rate (□) of POM composites: (a) unfilled POM; (b) POM/PTFE(24); (c) POM/Ca-OCA(1); (d) POM/SiC(0.1); (e) POM/SiC(0.1)/Ca-OCA(1). The minimum value obtained from measurements of five specimens was plotted. Contact pressure=0.7 MPa; sliding velocity=0.5 m/s; room temperature; dry condition.
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Changes in tooth temperature of the POM gears with running time. Test conditions: bending stress=26 MPa; rotational speed=200 rpm (pitch line velocity=0.314 m/s); dry running; room temperature.
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Load bearing characteristics of unfilled POM (•); POM/SiC(0.1)/Ca-OCA(1) (□); and POM/PTFE(24) (▵). Test conditions: rotational speed=200 rpm (pitch line velocity=0.314 m/s); dry, room temperature.
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Comparison of qualitative noise generation during running: (a) unfilled POM; (b) POM/SiC(0.1)/Ca-OCA(1). Test conditions: dry, room temperature.

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