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Fabrication of aluminium matrix composites

Aluminium matrix compositesCeramic reinforcementPreformPressureless infiltrationWettability

Introduction

The proposed system concerns the production of aluminium matrix composites by infiltration, without the need to apply external pressure. The method has a great potential for different industrial applications because of its simplicity, the low cost and the possibility of obtaining end-products or semi-finished parts, with the desired size and shape, using a minimum number of mechanical processes.

Technical features

The proposed system concerns the production of aluminium matrix composites by infiltration, without the need to apply external pressure. The method entails preparing the preform of a mixture which contains at least one kind of ceramic reinforcement material along with aluminium powder. The wettability is obtained before infiltration owing to the mechanical mixing of components and there are not specific requirements on the composition of the alloy during the infiltration phase. The compound is spontaneously infiltrated by molten aluminium under a protective environment, in the temperature range of 700-1500 centigrade degrees.

Possible Applications

  • Automotive industry;
  • Aerospace industry;
  • Electronic and optical instruments;
  • Sports equipment.

Advantages

  • Simple;
  • Flexible;
  • Low cost;
  • No restriction on the type of aluminium alloy consituting the matrix;
  • Good control of the final characteristics of the compound.