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Machining of the advanced MMC and CMC composites

Włodzimierz S. Wilk 1Barbara Staniewicz-Brudnik Lucyna R. Jaworska 

1. Institute of Advanced Manufacturing Technology (IOS), Wrocławska 37A, Kraków 30-011, Poland

Abstract

Modern Metal Matrix Composites (MMC’s) and Ceramic Matrix Composites (CMC’s) for automotive and aviation applications will be discussed. The research works of CMC Composites manufacturing in the Institute of Advanced Manufacturing Technology, will be described.

The selection of tools, machine tools, conditions and parameters of machining aluminium composite castings with ceramic preforms of Al2O3 in AlSi9Mg alloy, formed by pressure squeeze infiltration, which imitates the piston head of internal combustion engine, will be described. The important role at the cast composite machining have cut-off processes (the castings gating system cutting-off, cutting-out and slicing the samples for investigation, grinding the final samples for the tensile tests, cutting-through of the worn parts at the recycling processes).

The results of carried out machining tests of aluminium composites reinforced with Al2O3 and Si3N4 particulates, will be given. The characteristic of the diamond grinding wheels, made in the Institute of Advanced Manufacturing Technology for this task, will be given.

The basic problem of machining MMC’s and CMC’s composite materials is intensive edge's wear, induced by hard ceramic phases with high abrasive properties. Only use of tools with diamond edges and diamond grinding wheels have resulted in long edges lives and short machining times, for such composites.
 

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Related papers

Presentation: Poster at E-MRS Fall Meeting 2008, Symposium I, by Włodzimierz S. Wilk
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-19 16:25
Revised:   2009-06-07 00:48