EVALUATION OF TRIBOLOGICAL CHARACTERISTICS OF PTFE COMPOSITE TRANSFER FILMS IN ULTRA-HIGH VACUUM

被引：19

作者：

MINAMI, M ^{[1
]}

SUZUKI, M ^{[1
]}

NISHIMURA, M ^{[1
]}

机构：

[1] NATL AEROSP LAB,CHOFU,TOKYO,JAPAN

来源：

TRIBOLOGY TRANSACTIONS | 1993年 / 36卷 / 01期

关键词：

PTFE COMPOSITE; TRANSFER FILM; XPS; EPMA; ULTRA-HIGH VACUUM; METAL FLUORIDE;

D O I：

10.1080/10402009308983137

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Tribological characteristics of transfer films from polytetrafluoroethylene (PTFE)-based, glass-fiber reinforced composites to 440C stainless steel disks were evaluated in an ultra-high vacuum, using a dual-pin-on-disk friction tester. The transfer film was formed by rubbing a composite pin against a 440C stainless steel disk. A friction test was then carried out using the other 440C stainless steel pin. Three types of composites with the additives, Mo, Ag or MoS2 were tested. Outstanding tribological performance was obtained with the composite containing molybdenum. X-ray photoelectron spectroscopy (XPS) analysts of the transfer film showed both PTFE and metal fluoride to exist on the disks for all the composites tested. Therefore, metal fluoride is not the reason for the outstanding performance observed using the composite with the molybdenum additive. Electron probe micro analysis (EPMA) studies showed that, for the case of the composite containing molybdenum, considerable transferred fluorine was found in the center portion of the rubbing path and the distribution of fluorine coincided with that of molybdenum, while for the other composites, little fluorine existed in the center portion. The authors suppose this was caused by the catalytic action of molybdenum.

引用

页码：95 / 103

页数：9

共 10 条

[1] ADHESION AND FRICTION OF PTFE IN CONTACT WITH METALS AS STUDIED BY AUGER SPECTROSCOPY, FIELD-ION AND SCANNING ELECTRON-MICROSCOPY [J].