THE UNLUBRICATED SLIDING OF AL-SI ALLOYS AGAINST STEEL - MOSSBAUER-SPECTROSCOPY AND X-RAY-DIFFRACTION OF WEAR DEBRIS

Authors
ANTONIOU RA BROWN LJ CASHION JD
Citation
Ra. Antoniou et al., THE UNLUBRICATED SLIDING OF AL-SI ALLOYS AGAINST STEEL - MOSSBAUER-SPECTROSCOPY AND X-RAY-DIFFRACTION OF WEAR DEBRIS, Acta metallurgica et materialia, 42(10), 1994, pp. 3545-3553
Citations number
36
Categorie Soggetti
Material Science","Metallurgy & Mining
Journal title
Acta metallurgica et materialia → ACNP
ISSN journal
09567151
Volume
42
Issue
10
Year of publication
1994
Pages
3545 - 3553
Database
ISI
SICI code
0956-7151(1994)42:10<3545:TUSOAA>2.0.ZU;2-S
Abstract
The behaviour of iron atoms during the unlubricated sliding of Al-Si a lloys against a steel countersurface has been investigated. Mossbauer spectroscopy and X-ray diffraction have been used to identify the form of the iron that was present in the mostly aluminium surface layers t hat were formed by the wearing process. The iron was found to exist mo stly as elemental iron, 57-80 at.%, with a significant amount as Fe2+, 14-29 at. %. The Fe2+ was probably a finely dispersed amorphous iron oxide which, it is suggested, increases the stability of the surface l ayers by pinning the grain boundaries,