Tribological behavior and surface analysis of tribodeformed AI Alloy-50 Pet graphite particle composites
- 1 June 1991
- journal article
- Published by Springer Science and Business Media LLC in Metallurgical Transactions A
- Vol. 22 (6), 1435-1441
- https://doi.org/10.1007/bf02660675
Abstract
A low-pressure infiltration-casting technique was used to produce Al alloy (2014)-50 vol pct graphite particle composites. The tribological behavior of the worn surfaces of the above composites was investigated. It was found that the coefficient of friction was of the order of 0.2 as compared to over 0.4 for the matrix alloy and stabilized after a running distance of the order of 5 m. In addition, the wear rate for the composite alloys is lower and decreases after sliding distances of the order of 2 m under conditions of 10 N and 0.1 m/s. The reduced friction and wear rate of the composites as compared to the base alloy are presumably due to the formation of a solid lubricating film at the surface. Detailed X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) analyses show that this lubricating film is approximately 10 to 20-nm thick and is composed of a carbonaceous mixture of primarily graphitic carbon plus some carbon oxides and air-deposited hydrocarbons in the film. In addition, some aluminum-containing particles also are present in the film.Keywords
This publication has 9 references indexed in Scilit:
- A surface-analytical study of tribodeformed aluminum alloy 319-10 vol.% graphite particle compositeMaterials Science and Engineering: A, 1990
- Wetting of ceramic particulates with liquid aluminum alloys: Part I. Experimental techniquesMetallurgical Transactions A, 1989
- Solidification, structures, and properties of cast metal-ceramic particle compositesInternational Materials Reviews, 1986
- Production and evaluation of squeeze-cast graphitic AI–Si alloysMaterials Science and Technology, 1985
- Wear of cast Al-Si alloys containing graphiteWear, 1984
- Performance of aluminum alloy graphite bearings in a diesel engineTribology International, 1983
- ESCA applied to polymers. XXXI. A theoretical investigation of molecular core binding and relaxation energies in a series of prototype systems for nitrogen and oxygen functionalities in polymersJournal of Polymer Science: Polymer Chemistry Edition, 1981
- Dry wear of al-graphite particle compositesWear, 1981
- Seizure resistance of cast aluminium alloys containing dispersed graphite particles of various sizesWear, 1980