UNLUBRICATED OSCILLATING SLIDING WEAR OF C C-SIC FIBER-REINFORCED COMPOSITES/

Citation
B. Zimmerlin et al., UNLUBRICATED OSCILLATING SLIDING WEAR OF C C-SIC FIBER-REINFORCED COMPOSITES/, Materialwissenschaft und Werkstofftechnik, 25(11), 1994, pp. 442-450
Citations number
20
Categorie Soggetti
Material Science
ISSN journal
09335137
Volume
25
Issue
11
Year of publication
1994
Pages
442 - 450
Database
ISI
SICI code
0933-5137(1994)25:11<442:UOSWOC>2.0.ZU;2-E
Abstract
C/C-SiC fibre reinforced composites were produced by liquid infiltrati on technique. Porous C-fibre laminates containing carbonic resin were infiltrated with liquid silicon, leading to a SiC-matrix. Mechanical a nd thermal properties of the composites were measured. Tribological te sts were carried out on self-mated C/C-SiC and C/C-SiC mated with ZrO2 and steel, respectively, in unlubricated oscillating sliding contact using a ring-on-block tribometer. Environmental conditions such as rel ative humidity and testing temperature were varied. Microstructures of the composites as well as the worn surfaces were systematically analy sed using scanning electron microscopy. Experimental results showed a significant influence of the relative humidity and the testing tempera ture on tribological properties. Self-lubricating effects due to carbo n films occurred at sufficient humidity, contact temperatures < 90-deg rees-C and below a critical surface pressure.